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Old 10-27-07, 01:40 PM   #1
fca
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Join Date: Oct 2007
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Default (probably) SOLVED ...screen resolution with 8600gts, 100.14.19, VX2025WM, Ubuntu 7.10

Hi,

I'm having a screen resolution issue with a 8600GTS, under Ubuntu 7.10 (Gusty Gibbon), and the 100.14.19 driver: when the nvidia driver is activated, my resolution is stuck at 640x480.
My monitor is a Viewsonic VX2025wm, flat panel, wide screen. It's connected via DVI, directly, and it's native resolution is 1680x1050@60Hz.

It looks like the 8600gts can't find a valid resolution, then defaults to 640x480.

I've tried to modify xorg.conf and do the following:
- specified HorizSync & VertRefresh,
- added a gtf-generated modeline for 1680x1050,
- disabled EDID stuff.
Nothing works.

What is strange is that when I change the driver to VESA, the 1680x1050 resolution works.

Does anyone have a clue on what prevents the nvidia driver from using 1680x1050 ?
Does anyone have a similar configuration that works ?

Thanks.

fab

(nvidia log file attached)
Attached Files
File Type: bz2 nvidia-bug-report.log.bz2 (30.2 KB, 200 views)
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Old 10-27-07, 02:06 PM   #2
netllama
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Default Re: Can't set proper screen resolution with 8600gts, 100.14.19, VX2025WM, Ubuntu 7.10

The problem is here:
(WW) NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

Without being able to read the EDID, no native modes can be determined, and the driver is going to fall back to a safe mode.
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Old 10-28-07, 01:19 AM   #3
fca
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Default Re: Can't set proper screen resolution with 8600gts, 100.14.19, VX2025WM, Ubuntu 7.10

Thanks for your answer, netllama.

I've turned "UseEDID" to false, and all I get is :

(WW) NVIDIA(0): No valid modes for "1680x1050_61.00"; removing.
(WW) NVIDIA(0): No valid modes for "1680x1050@60"; removing.


I've played around with some others EDID-related options, such as ModeValidation and DPI stuff, but still no luck (attached log file).

Is EDID mandatory for the nvidia driver to run ? Should I use a custom EDID file ?

fab
Attached Files
File Type: bz2 nvidia-bug-report.log.bz2 (30.2 KB, 125 views)
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Old 10-28-07, 01:23 AM   #4
netllama
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Default Re: Can't set proper screen resolution with 8600gts, 100.14.19, VX2025WM, Ubuntu 7.10

Setting UseEDID to false isn't going to help, as there isn't an EDID anyway. You need to figure out why the EDID isn't being detected. Perhaps your DVI cable is damaged?
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Old 10-28-07, 03:18 AM   #5
fca
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Default (probably) SOLVED ...screen resolution with 8600gts, 100.14.19, VX2025WM, Ubuntu 7.10

Quote:
Perhaps your DVI cable is damaged?
...or something is wrong between 100.14.19 drivers and the VX2025WM's DVI interface.
I'm running WinXP on the same machine (same DVI cable) with the latest drivers, and there's no such problem.

Anyway, I've connected the monitor with a VGA cable, turned EDID options back on, then it worked !
My DFP is being labeled CRT, but the resolution is now OK.

(in case that may help anyone, working xorg.conf attached)

Thanks for your support, netllama !

fab
Attached Files
File Type: bz2 xorg.conf_8600gts_vx2025wm.bz2 (1.2 KB, 301 views)
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