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Old 11-15-06, 12:53 AM   #11
longshot
Registered User
 
Join Date: Jun 2006
Posts: 17
Default Re: Twinview fails + missing 'wfb' module

I was having a similar problem, but now things are working.

Previously, one of the monitor's edid seemed to be corrupted like yours


(--) NVIDIA(0): Connected display device(s) on GeForce 6600 GT at PCI:3:0:0:
(--) NVIDIA(0): HP 7650 (CRT-0)
(--) NVIDIA(0): @@@ (CRT-1)
(--) NVIDIA(0): HP 7650 (CRT-0): 400.0 MHz maximum pixel clock
(--) NVIDIA(0): @@@ (CRT-1): 400.0 MHz maximum pixel clock
...
(II) NVIDIA(0): Virtual screen size determined to be 1600 x 1200


Now with things working I get

(--) NVIDIA(0): Connected display device(s) on GeForce 6600 GT at PCI:3:0:0:
(--) NVIDIA(0): HP 7650 (CRT-0)
(--) NVIDIA(0): HP 7650 (CRT-1)
(--) NVIDIA(0): HP 7650 (CRT-0): 400.0 MHz maximum pixel clock
(--) NVIDIA(0): HP 7650 (CRT-1): 400.0 MHz maximum pixel clock
...
(II) NVIDIA(0): Virtual screen size determined to be 3200 x 1200


In investigating the problem I tried a lot of different things, including backing down through several driver versions (9742, 9629, 8776), changing settings in xorg.conf, checking physical connections etc.

I have a suspicion the problem may have been due to the physical connection not engaging the ddc pins properly ... but cant reproduce. On the dvi-vga adapter if I have it right the ddc pins are short ones next to the blade and when the connector is not screwed in they may not connect properly/intermittently.

However, I still had the problem even when I turned off use of edids
Option "UseEdidFreqs" "false"
although I just noticed I didnt set
# Option "ModeValidation" "NoEdidModes"

Anyhow, I'm now using the edids but with MetaModes to give resolutions (specifically 1600x1200), otherwise a lower resolution gets selected. All my Modes are commented out, so they dont seem to be required.
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