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Old 10-03-09, 03:34 PM   #1
ercoppa
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Default [Regression] Wrong resolution on external monitor from >185.19

I have problem with an external monitor (LG M227WD) on VGA & Nvidia 9400M. Before 185.19 no problem to set the max resolution (1920x1080), but with every release >185.19 I can set as max only 1680x1050.

Greets, ercoppa.
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Old 10-04-09, 04:26 PM   #2
AaronP
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Please see the forum sticky posts about how to generate a bug report with a verbose mode validation log.
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Old 10-05-09, 04:19 AM   #3
ercoppa
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

I am sorry. I have attached the log.

More info: problem occurred on Ubuntu Jaunty, Ubuntu Karmic beta, ArchLinux 2.6.30

Greets, ercoppa.
Attached Files
File Type: gz nvidia-bug-report.log.gz (45.3 KB, 76 views)
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Old 10-05-09, 12:01 PM   #4
AaronP
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

I'm afraid your bug report is missing the verbose mode validation log that I requested. Please make sure you started X with the command "startx -- -logverbose 6" or enabled the "ModeDebug" option before generating the bug report.

However, there is one clue in your bug report file: the driver first started with the mode "nvidia-auto-select" mode, and then later switched to the metamode "DFP-0:1280x800+0+0,DFP-2:1920x1080+1280+0". Did you do that intentionally? If not, it's possible that your desktop environment is changing the screen resolution after you log in. This is typically a problem with GNOME desktops.
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Old 10-05-09, 01:32 PM   #5
ercoppa
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Thanks for your help.

If I attached the VGA cable to TV, in nvidia-settings I have only:

But from disper:
Code:
ercoppa@ercoppa-laptop:~$ disper -l
display DFP-0: Apple
 resolutions: 320x240, 400x300, 512x384, 576x432, 680x384, 640x480, 720x450, 640x512, 700x525, 800x512, 840x525, 800x600, 960x540, 1024x768, 1280x800
display DFP-2: LG M227WD
 resolutions: 320x240, 400x300, 416x312, 512x384, 576x432, 680x384, 640x480, 720x450, 640x512, 700x525, 800x512, 840x525, 800x600, 960x540, 832x624, 960x600, 896x672, 1024x768, 1152x864, 1360x768, 1280x960, 1280x1024, 1400x1050, 1680x1050, 1920x1080
Quote:
Did you do that intentionally?
Yes, I do that with:
Code:
disper -e
but disper return an error:
Code:
unrecognised scaling value for DFP-0 from nvidia-settings: 131073
Some minutes and I give you the verbose log
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Old 10-05-09, 02:06 PM   #6
ercoppa
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Verbose log (I hope).

Greets, ercoppa.
Attached Files
File Type: gz nvidia-bug-report.log.gz (65.4 KB, 80 views)
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Old 10-05-09, 02:21 PM   #7
AaronP
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Some of those resolutions exceed your hardware's capabilities:
Code:
(WW) Oct 05 20:58:20 NVIDIA(GPU-0):     BestFit Centered ViewPort 1920x1080 exceeds hardware
(WW) Oct 05 20:58:20 NVIDIA(GPU-0):         capabilities.
Does disabling DFP-0 or lowering the screen resolution allow the 1920x1080 mode on DFP-2? You could also try adding Option "ModeValidation" "NoExtendedGPUCapabilitiesCheck" to /etc/X11/xorg.conf, but please be aware that that option is not officially supported.

Last edited by AaronP; 10-05-09 at 02:22 PM. Reason: Fix typo
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Old 10-05-09, 02:41 PM   #8
ercoppa
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Quote:
Does disabling DFP-0 or lowering the screen resolution allow the 1920x1080 mode on DFP-2?
Yes, if I disable DFP-0 (I use disper -S), I can have 1920x1080 on the external monitor without problems.

Quote:
You could also try adding Option "ModeValidation" "NoExtendedGPUCapabilitiesCheck" to /etc/X11/xorg.conf, but please be aware that that option is not officially supported.
Can be dangeorous?

The strange thing is with <=185.19 I have no problem

Greets, ercoppa.
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Old 10-05-09, 03:26 PM   #9
AaronP
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Not dangerous -- it can't damage your hardware --, it's just possible that the screen might flicker or display the wrong thing sometimes. That check was added in recent drivers, so that might explain why older drivers allowed that mode.
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Old 10-05-09, 04:17 PM   #10
ercoppa
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Default Re: [Regression] Wrong resolution on external monitor from >185.19

Thanks AaronP, you are very helpful, I appreciate. I try this option

Greets, ercoppa.
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