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**neiby** · Dec 13, 2008, 06:49 PM

Re: Can't increase resolution or refresh rate

It appears that much of my display config is missing. Here is my xorg.conf:

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
EndSection

Section "Module"
Load "glx"
EndSection

Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
Option "NoLogo" "True"
EndSection

**neiby** · Dec 13, 2008, 06:54 PM

Re: Can't increase resolution or refresh rate

Okay, I ran sudo nvidia-xconfig and it seemed to add a few new sections to xorg.conf. I restarted X but it hasn't added any options, so I still can't raise my resolution higher than 1024x768 and my refresh rate is stuck at 50. Here is the xorg.conf that that utility generated:

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection

Section "Module"
Load "glx"
EndSection

Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "keyboard"
EndSection

Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Configured Video Device"
Monitor "Configured Monitor"
DefaultDepth 24
Option "NoLogo" "True"
SubSection "Display"
Depth 24
Modes "nvidia-auto-select"
EndSubSection
EndSection

**neiby** · Dec 13, 2008, 07:11 PM

Re: Can't increase resolution or refresh rate

After reading another thread, I thought I found a solution. From the command line I used the gtf utility to generate some new settings for my xorg.conf file. I added the following to the Monitor section:

# 1280x960 @ 85.00 Hz (GTF) hsync: 85.68 kHz; pclk: 149.43 MHz
Modeline "1280x960_85.00" 149.43 1280 1376 1512 1744 960 961 964 1008 -HSync +Vsync

I restarted X but I don't see any change and those settings are still not available in System Settings. Do I need to do something else to make those settings available to me?

**neiby** · Dec 13, 2008, 07:19 PM

Re: Can't increase resolution or refresh rate

I realized that I needed to reference that display mode in another section, so I added it here:

Section "Screen"
Identifier "Default Screen"
Device "Configured Video Device"
Monitor "Configured Monitor"
DefaultDepth 24
Option "NoLogo" "True"
SubSection "Display"
Depth 24
Modes "1280x960_85.00"
EndSubSection
EndSection

The Modes section used to say something about autoselecting a mode. However, still no luck. Something is overriding my xorg.conf file and setting me to 1024x768.

**neiby** · Dec 13, 2008, 08:17 PM

Re: Can't increase resolution or refresh rate

After reading the post by LinuxRocks, I added the following to the beginning of xorg.conf:

Section "ServerFlags"
Option "AutoAddDevices" "False"
EndSection

I restarted X, but I'm still stuck in 1024x768. I just don't understand how that could be. The ONLY mode I have listed in there is 1280x960.

Should I try using the non-proprietary drivers? If so, how do I do that?

**LinuxRocks** · Dec 13, 2008, 08:41 PM

Re: Can't increase resolution or refresh rate

Try this:

Modes "1280x1024"

Or

Modes "1280x1024" "1152x864" "1024x768" "800x600" "640x480"

**neiby** · Dec 13, 2008, 08:44 PM

Re: Can't increase resolution or refresh rate

I can try that, but the resolution I want is 1280x960.

I saw a suggestion elsewhere to look in /var/log for the Xorg logs Here is something I noticed:

(WW) NVIDIA(GPU-0): The EDID read for display device CRT-1 is invalid:
(WW) NVIDIA(GPU-0): unrecognized EDID Header.

Apparently, this means that the system is not able to recognize my monitor, a Dell E991.

(II) NVIDIA(0): NVIDIA GPU GeForce 7900 GS (G71) at PCI:1:0:0 (GPU-0)
(--) NVIDIA(0): Memory: 262144 kBytes
(--) NVIDIA(0): VideoBIOS: 05.71.22.42.04
(II) NVIDIA(0): Detected PCI Express Link width: 4X
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(--) NVIDIA(0): Connected display device(s) on GeForce 7900 GS at PCI:1:0:0:
(--) NVIDIA(0): CRT-1
(--) NVIDIA(0): CRT-1: 400.0 MHz maximum pixel clock
(II) NVIDIA(0): Assigned Display Device: CRT-1
(WW) NVIDIA(0): No valid modes for "1280x960_85.00"; removing.
(WW) NVIDIA(0):

This seems to mean that my Modes line is wrong. I generated it using the gtf utility. Should I have done something different?

(WW) NVIDIA(0): Unable to validate any modes; falling back to the default mode
(WW) NVIDIA(0): "nvidia-auto-select".
(WW) NVIDIA(0):
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0): "nvidia-auto-select"
(II) NVIDIA(0): Virtual screen size determined to be 1024 x 768
(WW) NVIDIA(0): Unable to get display device CRT-1's EDID; cannot compute DPI
(WW) NVIDIA(0): from CRT-1's EDID.
(==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
(==) NVIDIA(0): Enabling 32-bit ARGB GLX visuals.
(--) Depth 24 pixmap format is 32 bpp

**LinuxRocks** · Dec 13, 2008, 08:45 PM

Re: Can't increase resolution or refresh rate

Oh and make sure you alt+e to restart your x server after making changes to your conf file...

**neiby** · Dec 13, 2008, 08:46 PM

Re: Can't increase resolution or refresh rate

Originally posted by LinuxRocks

Oh and make sure you alt+e to restart your x server after making changes to your conf file...

I've been doing ctrl-alt-backspace. Is that wrong?

**LinuxRocks** · Dec 13, 2008, 08:54 PM

Re: Can't increase resolution or refresh rate

Well, I suppose if it restarts the xserver then that is ok, but when I do that, it kills it completely and drops me to a terminal screen :-P. So I use alt+e which does the same thing.

Did those suggestions I listed help at all?

**neiby** · Dec 13, 2008, 08:56 PM

Re: Can't increase resolution or refresh rate

I didn't try them yet. Wouldn't I have to have corresponding modelines? I thought the Modes section was a pointer to modes that had been defined in the Monitor section.

**LinuxRocks** · Dec 13, 2008, 09:05 PM

Re: Can't increase resolution or refresh rate

Originally posted by neiby

I didn't try them yet. Wouldn't I have to have corresponding modelines? I thought the Modes section was a pointer to modes that had been defined in the Monitor section.

Nope.. Here is an example of mine...

Code:

Section "Screen"
  Identifier   "Default Screen"
  Device     "nVidia Corporation G80 [GeForce 8800 GTX]"
  Monitor    "Generic Monitor"
  DefaultDepth  24
  Option     "AddARGBGLXVisuals" "True"
  SubSection   "Display"
    Depth    24
    Modes   "1920x1200" "1600x1200" "1280x1024" "1152x864" "1024x768" "800x600" "640x480"
   EndSubSection
#    Modes   "nvidia-auto-select"
#  EndSubSection
EndSection

Doesn't matter what video driver you are using, this will work with nvidia, ATI, Intel, any of them. Its standard syntax for xorg.

Give it a try. If it barfs, you have a back up

**neiby** · Dec 13, 2008, 09:14 PM

Re: Can't increase resolution or refresh rate

Okay, after adding those lines, I was able to get 1152x864 as an additional option, but I don't like that resolution. Interestingly, I found the manual for this monitor and it doesn't list 1280x960 as an available mode, but I'd swear that's what I have it set to in Windows XP and it looks perfect. Hmm.... I'll boot into windows to verify that.

Also, I checked the logs and I see the following now:

(WW) NVIDIA(0): No valid modes for "1920x1200"; removing.
(WW) NVIDIA(0): No valid modes for "1600x1200"; removing.
(WW) NVIDIA(0): No valid modes for "1280x1024"; removing.
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0): "1152x864"
(II) NVIDIA(0): "1024x768"
(II) NVIDIA(0): "800x600"
(II) NVIDIA(0): "640x480"
(II) NVIDIA(0): Virtual screen size determined to be 1152 x 864
(WW) NVIDIA(0): Unable to get display device CRT-1's EDID; cannot compute DPI
(WW) NVIDIA(0): from CRT-1's EDID.
(==) NVIDIA(0): DPI set to (75, 75); computed from built-in default

**LinuxRocks** · Dec 13, 2008, 09:20 PM

Re: Can't increase resolution or refresh rate

Yeah, the 1920x1200 and 1600x1200 modes were specific to my monitor. I would have just started at the 1280x1024 for your setup.

Its quite possible that your monitor only supports the 1152x864 max setting in xorg. Windows XP might have better hardware support for your monitor (Which is not unusual seeing as Windows is the defacto standard desktop).

If you still cant get it to 1280x1024 and you are sure Windows uses that setting, you can post a bug report on the xorg site to let them know. Might want to include xorg.conf, Xorg.0.log and what ever else you can think of to see if they can help ya.

Good luck, and I am glad you got it at least to the next level

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