HDMI xsever settings are wrong for my 720P Vizo TV.

[steve7233]

I saw this

xrandr --output VGA --mode 1920x1080 --rate 50

and thought it might help. Maybe give a clue.

[steve7233]

I missed the letter r:

steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$ xrandr --output HDMI --mode 1366X768 --rate  50
warning: output HDMI not found; ignoring
steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$

Hmm, I guess replacing VGA with HDMI didn't work.

[steve7233]

I was close. I just needed to add a 1 right after HDMI. Unfortunately:

steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$ xrandr --output HDMI1 --mode 1366X768 --rate  50
xrandr: cannot find mode 1366X768
steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$

I still need to figure this out.

[oshunluvr]

The problem is 1366 isn't divisible by 8 and many parts of xorg desire this. You usually end up with 1360 and six blank pixels or 1368 and 2 pixels off-screen. My experience shows that if the EDID of the subject device is good then xorg usually detects and sets the resolution correctly. Otherwise, you have to build your own modeline and see how close you can get. 1280x720 is the 720p standard and most non-1080p TVs auto-stretch 720p to 1366x768 - which is why xorg doesn't get it. My plasma TV does this and I could never get *buntu to display 1366x768 properly. Some other distros did though. Notably, MythTV and Sabayon.

I can't imagine why all this came about, but it's a royal PITA. If 720p (1280x720) doesn't work for you, start searching the 'net for solutions for your particular set up and see what other have done to get it to work.

BTW, xrandr -q should show all your outputs and their currently supported resolutions. Reading your /var/log/Xorg.0.log file may shed some light as well.

[claydoh]

I am going to see if I can do a write-up, retrace the steps I took to get hdmi resolution correct for my Vizio 32 inch tv which was a similar model to your VX32, but I no longer own, and have since discarded the data I used to have it run nicely. Might take me a little while to get it together, a few days or so (working retail means working holidays ). It is not actually difficult, but is mostly command-line and trial-and-error.

[claydoh]

Ok, delving back into old territory for me, here is what I did to get the resolution close on my very similar Vizio 720p TV (1368x768, as mentioned above by oshunluvr):

Warning: this could be incorrect information, though I have tried to see if it is current. It should not do any harm to your system, but all caveats and lack of guarantees are in effect

this is from the relevant parts of this wiki page:
https://wiki.ubuntu.com/X/Config/Res...ed_resolutions

I'd suggest running each step one at a time to check for any errors so that you can report back here

run the xrandr command to see what your video outputs are named.
mine looks lile this (note I do not have hdmi on this laptop):

Screen 0: minimum 320 x 200, current 1280 x 800, maximum 32767 x 32767
LVDS1 connected primary 1280x800+0+0 (normal left inverted right x axis y axis) 304mm x 19000mm
   1280x800       60.0*+
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
DVI1 disconnected (normal left inverted right x axis y axis)
TV1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

What we need to see is what the hdmi connection is called, probably HDMI1, but it could be different.




Now, run the cvt command to generate the modelines:

cvt 1366 768 60

You will get an output similar to this:

Modeline "1366x768_60.00" 85.5 1366 1494 1624 1798 768 770 776 795 -hsync +vsync

You might even get this exact output, the xbmc wiki page I linked to above lists this as the modeline for the VX32L. You can try using this, or the one you generated yourself.


Next we tell xrandr that we have created a new:

xrandr --newmode "1366x768" 85.5 1366 1494 1624 1798 768 770 776 795 -hsync +vsync

You may have to have the hdmi connected for these next steps


Then we add the mode to a specific output, substituting the actual name of your hdmi output :

xrandr --addmode HDMI1 1366x768

If there are no errors, run xrandr again to see if the new mode was added to the list (with the hdmi connected I believe)


A thing you can use to use to help switch video modes is the krandrtray tool, which is in the package kde-workspace-randr. You can run this, and it puts a system tray applet to quickly switch resolutions. You can also switch resolutions from within System Settings' Display and Monitor section without having to add tis extra and mostly redundant software. You should see the new resolution in the listing, so feel free to try that, and see what happens. If it fails for some reason, disconnecting the hdmi cable should reset things, if not a logoff/login should get you back to where you were before.

if for some reason, these steps work, and the resolution works, the next steps will be setting a script to activate it on login or boot somewhere, which we will try an tackle after we debug these steps.

[steve7233]

steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$ xrandr
Screen 0: minimum 320 x 200, current 2732 x 768, maximum 32767 x 32767
LVDS1 connected 1366x768+1366+0 (normal left inverted right x axis y axis) 353mm x 198mm
   1366x768       60.0*+
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 700mm x 390mm
   1366x768       59.8*+
   1280x1024      60.0  
   1024x768       75.1     60.0  
   800x600        72.2     75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$

[steve7233]

steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$ cvt 1366 768 60
# 1368x768 59.88 Hz (CVT) hsync: 47.79 kHz; pclk: 85.25 MHz
Modeline "1368x768_60.00"   85.25  1368 1440 1576 1784  768 771 781 798 -hsync +vsync
steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$

[steve7233]

I went ahead and tried the rest since no one was posting. I have two new options 1368X768 and 1360X768. Neither one is quit right. but cvt 1366X768 60 doesn’t work as the program changes 1366 to 1368.

[steve7233]

Here is what I have now.

steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$ xrandr
Screen 0: minimum 320 x 200, current 2734 x 768, maximum 32767 x 32767
LVDS1 connected primary 1366x768+1368+0 (normal left inverted right x axis y axis) 353mm x 198mm
   1366x768       60.0*+
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1368x768+0+0 (normal left inverted right x axis y axis) 700mm x 390mm
   1280x720       60.0 +   50.0     59.9  
   1920x1080i     60.1     50.0     60.0  
   1440x576i      50.1  
   720x576        50.0  
   720x480        60.0     59.9  
   640x480        60.0     59.9  
   1368X768       59.9* 
   1360X768       59.8  
   1366x768       60.0  
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
  1360x768_60.00 (0x221)   84.8MHz
        h: width  1360 start 1432 end 1568 total 1776 skew    0 clock   47.7KHz
        v: height  768 start  771 end  781 total  798           clock   59.8Hz
  1366X768 (0x30d)   85.5MHz
        h: width  1366 start 1494 end 1624 total 1798 skew    0 clock   47.6KHz
        v: height  768 start  770 end  776 total  795           clock   59.8Hz
steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$

Since cvt won't generate a mode line for 1366x768 60 then I just copied what you showed but when I switch to that resolution the TV displays its blue no signal screen.

[steve7233]

I am pretty sure the problem now is that the aspect ratio is wrong.

[claydoh]

Sorry, been away/distracted.

I had the same problem, but I cannot remember what I used that fixed the issue, though it did lean to which driver. At the time I was using some nvidia thing, (this was in 2010ish, maybe 2011), but I do not recall if I had success with it, or even tried connecting to the TV. Then I was using the on-board Ati RadeonHD 3200. I think I tried the open source Radeon driver, the open RadeonHD variant available at the time, and the closed ati driver. I for the life of me remember which combo of things actually worked.

The problem is that 1366 is a funky resolution number (not divisible by 8), so some drivers can't easily cope with it. I think this even happens (or happened) on windows drivers.

[steve7233]

You are right about Windows driver as I get the same problem in Windows.

I rebooted and my monitor is set to 1280x720. I output xrandr command:

steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$ xrandr
Screen 0: minimum 320 x 200, [COLOR="#FF0000"]current 1366 x 1488[/COLOR], maximum 32767 x 32767
LVDS1 connected 1366x768+0+720 (normal left inverted right x axis y axis) 353mm x 198mm
   1366x768       60.0*+
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected primary 1280x720+43+0 (normal left inverted right x axis y axis) 700mm x 390mm
   1280x720       60.0 +   50.0*    59.9  
   1920x1080i     60.1     50.0     60.0  
   1440x576i      50.1  
   720x576        50.0  
   720x480        60.0     59.9  
   640x480        60.0     59.9  
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
steve7233@steve7233-HP-Pavilion-dv6-Notebook-PC:~$

Notice the second line where it says current? I thought it stretched to 1366x768! No wonder it doesn’t display right.

[steve7233]

I just updated Kubuntu and noticed that the Intel driver updated. Unfortunately the update didn't fix my problem. I have been trying to understand how the rest of xrandr works but haven't figured out any thing new that might help.

[steve7233]

When I use xrandr to add and switch to 1360X768 It looks like the desktop is a bit larger than the screen! If I open Firefox and maximize it cuts off the file menu and the KDE menu doesn’t show and the clock only shows the hour and minutes and doesn't show the bottom of the number in the clock. How do I shrink the screen and desktop?