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[BTRFS] [GRUB] Problem with GRUB recognizing my two installations

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  • oshunluvr
    replied
    Excellent work and thanks for detailing it and your solution.
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  • SimonAndric
    replied
    hello!

    im just writing to say i managed to SOLVE it!

    the problem was with my "FOR" sentence.... The right way to do it is like this:

    Code:
    sudo mkdir /mnt
sudo mount -o subvol=@ /dev/sdaX /mnt
[COLOR=#ff0000]for i in /dev /dev/pts /proc /run /sys; do sudo mount -B /$i /mnt/$i; done[/COLOR]
sudo chroot /mnt
sudo grub-install /dev/sdX
sudo update-grub

[COLOR=#ff0000]for i in /dev /dev/pts /proc /run /sys; do sudo umount -B /$i /mnt/$i; done[/COLOR]
sudo umount /mnt
exit
    thank you for your help! much appriciated!

    nice day!

    Simon
    Last edited by SimonAndric; Jan 08, 2016, 08:26 PM. Reason: typos... :)
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  • oshunluvr
    replied
    My setup is different than yours so I can't answer that last part. I see why you might want to do that, but I have no ideas at the moment. You might consider that you're going through more work than really necessary considering the value of skipping a reboot to upgrade grub. Of course, learning how to do it could be useful down the road.

    What I do is install ALL my versions and distros to the same btrfs flesystem by changing the default subvolume names to unique names. My btrfs root looks like this:
    Code:
    stuart@office:~$ ll /mnt/samsung/
total 0
drwxr-xr-x 1 root   root   382 May 28  2015 @Kubuntu_14_04
drwxr-xr-x 1 root   root    48 Jan 25  2015 @Kubuntu_14_04_home
drwxr-xr-x 1 root   root   306 Dec 19 12:47 @Kubuntu_15_04
drwxr-xr-x 1 stuart stuart  86 Jul 27 09:51 @Kubuntu_15_04_home
drwxr-xr-x 1 root   root   248 Dec 19 13:25 @Kubuntu_15_10
drwxr-xr-x 1 root   root    52 Dec 19 13:13 @Kubuntu_15_10_home
drwxr-xr-x 1 root   root   126 Dec 19 12:55 snapshots
drwxr-x--- 1 stuart stuart 732 Nov  3 11:34 @stuart
    Then I use a dedicated grub install that uses the grub.cfg of each install to boot. IMO, there's little reason to upgrade grub often as it's not really a security issue.
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  • SimonAndric
    replied
    Originally posted by oshunluvr View Post
    Lots of data in there, but at first glance I have a question: Did you use the default install setup for btrfs when you installed (K)Ubuntu? What I mean is; when installing - you used the installer and selected a btrfs file system as the target to install to?

    If yes, the default (K)Ubuntu btrfs install creates two subvolumes on the target btrfs partition: @ for / and @home for /home. This means that, for example, the file system on 821f7ab0-4351-45f1-b870-1a4b33db1b5c contains these two subvolumes - @ and @home. Therefore, grub is not finding the configfile grub.cfg because it's in /@/boot/grub/ not /boot/grub/. Your 40_custom grub stanzas need to reflect the subvolume /@/ in the configfile statements.

    If you did something non-standard during install, please detail what.

    After booting, the two subvolumes are transparent to you because in your fstab mounts the subvolumes are stated as options like this: subvol=@. In fact, you should see two separate fstab lines that are nearly identical for both the root and home mounts - the only differences being the mount points and subvolume names.
    Hello!

    first let me say, your help is much appriciated, even more so, because IT WORKED! Thank you so much! By "it worked" i mean, i just had to minimally edit both of my "40_custom" files, to look like this:

    plasma 5 (etc/grub.d/40_custom):

    Code:
    #!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'kde4' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
configfile [COLOR=#ff0000][B]/@[/B][/COLOR]/boot/grub/grub.cfg
}
    and my kde4 (etc/grub.d/40_custom):

    Code:
    #!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'Plasma5' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
configfile [COLOR=#ff0000][B]/@[/B][/COLOR]/boot/grub/grub.cfg
}
    Let me also say both of my installations i used the default installation BTRFS settings (it means i selected btrfs partitions in the kubuntu installation menu), therefore my fstabs look like this:

    plasma5:

    Code:
    # /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda5 during installation
UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de /               btrfs   defaults,subvol=@ 0       1
# /home was on /dev/sda5 during installation
UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de /home           btrfs   defaults,subvol=@home 0       2
# swap was on /dev/sda1 during installation
UUID=d2ad0990-78e3-464e-8ac9-1dc67be49963 none            swap    sw              0       0


# kde4 on /dev/sda6
LABEL=kde4    /media/original/kde4root/               btrfs    defaults 0       1
/media/original/kde4root/@/ /media/fani/kde4/   none  bind     0   0
/media/original/kde4root/@home/ /media/fani/kde4_home/   none  bind     0   0

# disk on /dev/sda7
LABEL=disk    /media/original/diskroot/               btrfs    defaults 0       1
/media/original/diskroot/disk/ /media/fani/disk/   none  bind     0   0
    and kde4:

    Code:
    # /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda6 during installation
UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c /               btrfs   defaults,subvol=@ 0       1
# /home was on /dev/sda6 during installation
UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c /home           btrfs   defaults,subvol=@home 0       2
# swap was on /dev/sda1 during installation
UUID=d2ad0990-78e3-464e-8ac9-1dc67be49963 none            swap    sw              0       0
/dev/sdb        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0


# plasma5 on /dev/sda5
LABEL=plasma5    /media/original/plasma5root/               btrfs    defaults 0       1
/media/original/plasma5root/@/ /media/fani/plasma5/   none  bind     0   0
/media/original/plasma5root/@home/ /media/fani/plasma5_home/   none  bind     0   0

# disk on /dev/sda7
LABEL=disk    /media/original/diskroot/               btrfs    defaults 0       1
/media/original/diskroot/disk/ /media/fani/disk/   none  bind     0   0
    The only thing which i cannot right now still do is run "grub-install" when i chroot into another instalaltion. I know, now i can simply boot the other installation and "grub-install" from there, but i would like to know in case one day it might come in handy, if i find myself in situation that i cannot access the other installation other way than to chroot in it. Thats also the reason i (for now) wont mark this as solved just yet

    so if i do this:

    Code:
    fani@avatar:~$ sudo mount[COLOR=#ff0000][B] -o subvol=@[/B][/COLOR] /dev/sda5 /media/fani/plasma5

fani@avatar:~$ for i in dev/pts sys proc run; do sudo mount --bind /$i /media/fani/plasma5/$i; done

fani@avatar:~$ sudo chroot /media/fani/plasma5

root@avatar:/# sudo grub-install /dev/sda
Installing for i386-pc platform.
grub-install: napaka: failed to get canonical path of `/dev/sda5'.
    then i tried this (without setting the "subvol"):

    Code:
    fani@avatar:~$ sudo mount /dev/sda5 /media/fani/plasma5

fani@avatar:~$ for i in dev/pts sys proc run; do sudo mount --bind /$i /media/fani/plasma5/$i; done

fani@avatar:~$ sudo chroot /media/fani/plasma5

root@avatar:/# sudo grub-install /dev/sda
Installing for i386-pc platform.
grub-install: napaka: failed to get canonical path of `/dev/sda5'.
    same thing.... what am i doing wrong here?

    and..again thank you!

    nice day

    Simon
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  • oshunluvr
    replied
    Lots of data in there, but at first glance I have a question: Did you use the default install setup for btrfs when you installed (K)Ubuntu? What I mean is; when installing - you used the installer and selected a btrfs file system as the target to install to?

    If yes, the default (K)Ubuntu btrfs install creates two subvolumes on the target btrfs partition: @ for / and @home for /home. This means that, for example, the file system on 821f7ab0-4351-45f1-b870-1a4b33db1b5c contains these two subvolumes - @ and @home. Therefore, grub is not finding the configfile grub.cfg because it's in /@/boot/grub/ not /boot/grub/. Your 40_custom grub stanzas need to reflect the subvolume /@/ in the configfile statements.

    If you did something non-standard during install, please detail what.

    After booting, the two subvolumes are transparent to you because in your fstab mounts the subvolumes are stated as options like this: subvol=@. In fact, you should see two separate fstab lines that are nearly identical for both the root and home mounts - the only differences being the mount points and subvolume names.
    Last edited by oshunluvr; Jan 03, 2016, 08:01 AM.
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  • SimonAndric
    started a topic [SOLVED] [BTRFS] [GRUB] Problem with GRUB recognizing my two installations

    [BTRFS] [GRUB] Problem with GRUB recognizing my two installations

    Hello!

    First again thank you for helping me with a similar thread ( https://www.kubuntuforums.net/showth...oot-info-both& ), on forunatelly the help on that thread somehow doesnt work for the current problem i have, even though i thought it should. Let me explain my problem.

    I made three partitions (ok four is i also count swap area) on my hard drive. One is kde4 btrfs partition, one is plasma 5 btrfs partition and the rest is my data (disk) btrfs partition.

    sudo blkid reveals this:

    Code:
    fani@avatar:~$ sudo blkid
[sudo] password for fani: 
/dev/sda1: UUID="d2ad0990-78e3-464e-8ac9-1dc67be49963" TYPE="swap" 
/dev/sda5: LABEL="plasma5" UUID="3af2cb3c-34d8-4f4e-94be-4e7138e331de" UUID_SUB="ee92358e-4e0d-4b63-994e-aa697f36c1b8" TYPE="btrfs" 
/dev/sda6: LABEL="kde4" UUID="821f7ab0-4351-45f1-b870-1a4b33db1b5c" UUID_SUB="22361e2c-49cf-453e-ae0e-1b6cead244be" TYPE="btrfs" 
/dev/sda7: LABEL="disk" UUID="da357d7a-0b07-4cf4-913b-bf401349c598" UUID_SUB="896321ca-6656-4e07-b6aa-21cdf31671f6" TYPE="btrfs"
    i wanted to do the same thing as i did with my previous disk partitions - and what the previous thread has helped me with, but this time i dont know why it doesnt work. First i installed kde4, and then plasma5. When i installed plasma5 i remembered i forgot to create already a menu entry in kde4, so (after i made them menu entry in plasma5 for kde4) i chrooted and ran grub-install /dev/sda in my plasma5 system and in the next reboot the grub menu came for kde4.... i went in the kde4 and it booted fine... then i restarted the system and tried to select the plasma 5 entry and the *same* kde4 menu reappeared alsmost instantly...if i selected "plasma5" multiple times, same thing happened. So i went to kde4 and i tried to chroot into plasma5 system and ran grub-install /dev/sda there, but the command had an error. After reboot, if i selected the Plasma5 menu entry the computer immediately rebooted this time. It means the behaviour is now different. But i dont know if the behaviour is now better or worse... the main thing is, i cannot boot back in the plasma 5.

    Here is how i chrooted in both systems:

    Code:
    fani@avatar:~$ sudo mount -o subvol=@ /dev/sda5 /media/fani/plasma5

fani@avatar:~$ for i in dev/pts sys proc run; do sudo mount --bind /$i /media/fani/plasma5/$i; done

fani@avatar:~$ sudo chroot /media/fani/plasma5

root@avatar:/# sudo grub-install /dev/sda
Installing for i386-pc platform.
grub-install: napaka: failed to get canonical path of `/dev/sda5'.
    i also tried to do this (in chrooted plasma5):

    Code:
    fani@avatar:~$ sudo mount -o subvol=@ /dev/sda5 /media/fani/plasma5

fani@avatar:~$ for i in dev/pts sys proc run; do sudo mount --bind /$i /media/fani/plasma5/$i; done

fani@avatar:~$ sudo chroot /media/fani/plasma5

root@avatar:/# sudo grub-mkconfig -o /boot/grub/grub.cfg
/usr/sbin/grub-probe: napaka: failed to get canonical path of `/dev/sda5'.
    and

    Code:
    fani@avatar:~$ sudo mount -o subvol=@ /dev/sda5 /media/fani/plasma5

fani@avatar:~$ for i in dev/pts sys proc run; do sudo mount --bind /$i /media/fani/plasma5/$i; done

fani@avatar:~$ sudo chroot /media/fani/plasma5

root@avatar:/# sudo grub-install --recheck --root-directory=/media/fani/plasma5 /dev/sda
Installing for i386-pc platform.
grub-install: napaka: failed to get canonical path of `/dev/sda5'.

    my "40_custom" in kde4 (/etc/grub.d/40_custom):

    Code:
    #!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'Plasma5' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
configfile /boot/grub/grub.cfg
}
    my "40_custom" in plasma5 (/etc/grub.d/40_custom):

    Code:
    #!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'kde4' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
configfile /boot/grub/grub.cfg
}
    my grub.cfg in kde4 (/boot/grub/grub.cfg):

    Code:
    #
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}
function recordfail {
  set recordfail=1
  # GRUB lacks write support for btrfs, so recordfail support is disabled.
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod btrfs
set root='hd0,msdos6'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
else
  search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
fi
    font="/@/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=sl_SI
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=10
  fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
#set_background_image "images/tile.png";

set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 0,0,0; then
  clear
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
    set gfxpayload="${1}"
    if [ "${1}" = "keep" ]; then
        set vt_handoff=vt.handoff=7
    else
        set vt_handoff=
    fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-821f7ab0-4351-45f1-b870-1a4b33db1b5c' {
    recordfail
    load_video
    gfxmode $linux_gfx_mode
    insmod gzio
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos6'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
    else
      search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
    fi
    linux    /@/boot/vmlinuz-3.19.0-42-generic root=UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c ro rootflags=subvol=@  quiet splash $vt_handoff
    initrd    /@/boot/initrd.img-3.19.0-42-generic
}
submenu 'Napredne možnosti za Ubuntu' $menuentry_id_option 'gnulinux-advanced-821f7ab0-4351-45f1-b870-1a4b33db1b5c' {
    menuentry 'Ubuntu, z Linuxom 3.19.0-42-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-42-generic-advanced-821f7ab0-4351-45f1-b870-1a4b33db1b5c' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
        else
          search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
        fi
        echo    'Nalaganje Linuxa 3.19.0-42-generic ...'
        linux    /@/boot/vmlinuz-3.19.0-42-generic root=UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c ro rootflags=subvol=@  quiet splash $vt_handoff
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-3.19.0-42-generic
    }
    menuentry 'Ubuntu, with Linux 3.19.0-42-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-42-generic-recovery-821f7ab0-4351-45f1-b870-1a4b33db1b5c' {
        recordfail
        load_video
        insmod gzio
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
        else
          search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
        fi
        echo    'Nalaganje Linuxa 3.19.0-42-generic ...'
        linux    /@/boot/vmlinuz-3.19.0-42-generic root=UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c ro recovery nomodeset rootflags=subvol=@ 
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-3.19.0-42-generic
    }
    menuentry 'Ubuntu, z Linuxom 3.19.0-25-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-25-generic-advanced-821f7ab0-4351-45f1-b870-1a4b33db1b5c' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
        else
          search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
        fi
        echo    'Nalaganje Linuxa 3.19.0-25-generic ...'
        linux    /@/boot/vmlinuz-3.19.0-25-generic root=UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c ro rootflags=subvol=@  quiet splash $vt_handoff
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-3.19.0-25-generic
    }
    menuentry 'Ubuntu, with Linux 3.19.0-25-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-25-generic-recovery-821f7ab0-4351-45f1-b870-1a4b33db1b5c' {
        recordfail
        load_video
        insmod gzio
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
        else
          search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
        fi
        echo    'Nalaganje Linuxa 3.19.0-25-generic ...'
        linux    /@/boot/vmlinuz-3.19.0-25-generic root=UUID=821f7ab0-4351-45f1-b870-1a4b33db1b5c ro recovery nomodeset rootflags=subvol=@ 
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-3.19.0-25-generic
    }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry 'Memory test (memtest86+)' {
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos6'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
    else
      search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
    fi
    knetbsd    /@/boot/memtest86+.elf
}
menuentry 'Memory test (memtest86+, serial console 115200)' {
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos6'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6  821f7ab0-4351-45f1-b870-1a4b33db1b5c
    else
      search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
    fi
    linux16    /@/boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Ubuntu Xenial Xerus (development branch) (16.04) (na /dev/sda5)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos5'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
    else
      search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
    fi
    linux /boot/vmlinuz-4.3.0-5-generic root=/dev/sda5
    initrd /boot/initrd.img-4.3.0-5-generic
}
submenu 'Napredne možnosti za Ubuntu Xenial Xerus (development branch) (16.04) (na /dev/sda5)' $menuentry_id_option 'osprober-gnulinux-advanced-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
    menuentry 'Ubuntu Xenial Xerus (development branch) (16.04) (na /dev/sda5)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-4.3.0-5-generic--3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
        else
          search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
        fi
        linux /boot/vmlinuz-4.3.0-5-generic root=/dev/sda5
        initrd /boot/initrd.img-4.3.0-5-generic
    }
    menuentry 'Ubuntu Xenial Xerus (development branch) (16.04) (na /dev/sda5)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-4.4.0-0-generic--3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
        else
          search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
        fi
        linux /boot/vmlinuz-4.4.0-0-generic root=/dev/sda5
        initrd /boot/initrd.img-4.4.0-0-generic
    }
}

set timeout_style=menu
if [ "${timeout}" = 0 ]; then
  set timeout=10
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'Plasma5' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
configfile /boot/grub/grub.cfg
}

### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
    my grub.cfg in plasma5 (/boot/grub/grub.cfg):

    Code:
    #
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}
function recordfail {
  set recordfail=1
  # GRUB lacks write support for btrfs, so recordfail support is disabled.
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod btrfs
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
else
  search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
fi
    font="/@/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=sl_SI
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=10
  fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
    set gfxpayload="${1}"
    if [ "${1}" = "keep" ]; then
        set vt_handoff=vt.handoff=7
    else
        set vt_handoff=
    fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
    recordfail
    load_video
    gfxmode $linux_gfx_mode
    insmod gzio
    if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos5'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
    else
      search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
    fi
    linux    /@/boot/vmlinuz-4.4.0-0-generic root=UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de ro rootflags=subvol=@  quiet splash $vt_handoff
    initrd    /@/boot/initrd.img-4.4.0-0-generic
}
submenu 'Napredne možnosti za Ubuntu' $menuentry_id_option 'gnulinux-advanced-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
    menuentry 'Ubuntu, z Linuxom 4.4.0-0-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-0-generic-advanced-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
        else
          search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
        fi
        echo    'Nalaganje Linuxa 4.4.0-0-generic ...'
        linux    /@/boot/vmlinuz-4.4.0-0-generic root=UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de ro rootflags=subvol=@  quiet splash $vt_handoff
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-4.4.0-0-generic
    }
    menuentry 'Ubuntu, with Linux 4.4.0-0-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-0-generic-recovery-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
        recordfail
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
        else
          search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
        fi
        echo    'Nalaganje Linuxa 4.4.0-0-generic ...'
        linux    /@/boot/vmlinuz-4.4.0-0-generic root=UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de ro recovery nomodeset rootflags=subvol=@ 
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-4.4.0-0-generic
    }
    menuentry 'Ubuntu, z Linuxom 4.3.0-5-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.3.0-5-generic-advanced-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
        else
          search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
        fi
        echo    'Nalaganje Linuxa 4.3.0-5-generic ...'
        linux    /@/boot/vmlinuz-4.3.0-5-generic root=UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de ro rootflags=subvol=@  quiet splash $vt_handoff
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-4.3.0-5-generic
    }
    menuentry 'Ubuntu, with Linux 4.3.0-5-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.3.0-5-generic-recovery-3af2cb3c-34d8-4f4e-94be-4e7138e331de' {
        recordfail
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod btrfs
        set root='hd0,msdos5'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
        else
          search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
        fi
        echo    'Nalaganje Linuxa 4.3.0-5-generic ...'
        linux    /@/boot/vmlinuz-4.3.0-5-generic root=UUID=3af2cb3c-34d8-4f4e-94be-4e7138e331de ro recovery nomodeset rootflags=subvol=@ 
        echo    'Nalaganje začetnega ramdiska ...'
        initrd    /@/boot/initrd.img-4.3.0-5-generic
    }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry 'Memory test (memtest86+)' {
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos5'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
    else
      search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
    fi
    knetbsd    /@/boot/memtest86+.elf
}
menuentry 'Memory test (memtest86+, serial console 115200)' {
    insmod part_msdos
    insmod btrfs
    set root='hd0,msdos5'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  3af2cb3c-34d8-4f4e-94be-4e7138e331de
    else
      search --no-floppy --fs-uuid --set=root 3af2cb3c-34d8-4f4e-94be-4e7138e331de
    fi
    linux16    /@/boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'KDE4' {
insmod part_msdos
insmod btrfs
search --no-floppy --fs-uuid --set=root 821f7ab0-4351-45f1-b870-1a4b33db1b5c
configfile /boot/grub/grub.cfg
}

### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
    so,... i dont know what im doing wrong. one thing maybe i did wrong when installing... in both installations i named my computer name as "avatar" --- before i didnt do that, but i figured that maybe that doesnt matter because is a computer name... and the installations exist on different partitions...

    anyway,...please help

    thank you!

    nice day!

    Simon
    Tags: btrfs, dual-boot, grub, kde, plasma5
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