crash during login, punted back to login screen

[goertzenator]

My 15.04 comes up normally to the login screen. I login, the splash progress bar gets about 1/3 of the way across and then I get punted back to the login screen. dmesg says:

...
[    5.414778] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled
[    8.273629] r8169 0000:05:00.0 eth0: link up
[   14.622977] show_signal_msg: 30 callbacks suppressed
[   14.622982] kscreen_backend[1613]: segfault at 10 ip 00007f7f66993c40 sp 00007ffcd95c86b8 error 4 in KSC_XRandR.so[7f7f6697e000+22000]
[   15.479575] kactivitymanage[1604]: segfault at 18 ip 00007feedf6c3f00 sp 00007ffecfaf9d48 error 4 in libqxcb.so[7feedf695000+b9000]
[   15.480019] ksplashqml[1535]: segfault at 8 ip 00007f69bbf3d690 sp 00007ffc1354bd48 error 4 in libQt5Gui.so.5.4.1[7f69bbe2b000+52b000]
[   15.499968] kscreen_backend[1633]: segfault at 18 ip 00007f7477fcc059 sp 00007ffe521b8b40 error 4 in libqxcb.so[7f7477f82000+b9000]
[   15.635942] kaccess[1646]: segfault at 18 ip 00007fc173d31059 sp 00007ffc8da11b90 error 4 in libqxcb.so[7fc173ce7000+b9000]
[   15.635948] ksmserver[1645]: segfault at 18 ip 00007fe0589d8059 sp 00007fff22f488d0 error 4
[   15.635952]  in libqxcb.so[7fe05898e000+b9000

Two unusual things from the last working session:

1. Some updates were performed. They looked innocuous; nothing kde or qt related IIRC.

2. I unplugged the external monitor at which point the laptop display also went black. The only thing I could do was hit the power button for an orderly shutdown (the Kubuntu splash appeared on the screen while shutting down). Things usually screw up to some degree when unplugging the monitor, but I can normally still logout from plasma.


I'm not worried about the lesser external monitor issues because I know some Qt fixes will eventually arrive to improve things. But I would like to actually login and get some work done.

Suggestions?
Thanks,
Dan.



Other details:
- Laptop is Asus G550JK (nvidia and intel video)
- Nouveau nvidia driver
- kubuntu-ppa/backports are enabled (an effort to improve the external monitor situation)

[vinnywright]

see if you can login to a TTY (text console) ,,,,,,,,,at the GUI login screen press ctrl+alt+F6 ,,,,you should get a TTY ,,,login (type your user name and press enter ,,,enter your password ,,press enter ),,,,,,,can you ?

VINNY

[goertzenator]

I was able to login with Ctrl alt F1, and also through ssh.

[vinnywright]

I was able to login with Ctrl alt F1, and also through ssh.

go there ,,,,,,,login and do a

        [FONT=monospace][COLOR=#000000]find ~/ -user root[/COLOR]
[/FONT]

if you get any results then some files in your /home/you/ are owned by root and can keep you out of your system ...........all files in /home/you need to be owned by you ,,,,,,,,
so do a

sudo chown -R you:you /home/you

where "you" is your user name.

if the first command dose not turn up any results you may have some messed up settings or configs in /home/you/.kde or .config or .cache you could rename them IE:

mv .config .config.old

and on login new default ones will be re-created

VINNY

[goertzenator]

I did try moving the ~/.kde dir out of the way but that did not help. I blew away this Kubuntu installation a few hours ago, but thanks for trying to help. I'll have to keep the root-owned file check in mind in case anything like this happens again.