Bug 14881 - NV44 (GeForce 6200) fails to detect panel size via DVI
Summary: NV44 (GeForce 6200) fails to detect panel size via DVI
Status: RESOLVED WONTFIX
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nVidia (open) (show other bugs)
Version: 7.3 (2007.09)
Hardware: x86-64 (AMD64) Linux (All)
: low normal
Assignee: Aaron Plattner
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-03-07 10:05 UTC by Peter Samuelson
Modified: 2008-03-07 14:53 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
xorg.conf (1.71 KB, text/plain)
2008-03-07 10:05 UTC, Peter Samuelson 		no flags Details
Xorg.0.log using DVI (92.21 KB, text/plain)
2008-03-07 10:06 UTC, Peter Samuelson 		no flags Details
Xorg.0.log using VGA (101.62 KB, text/plain)
2008-03-07 10:06 UTC, Peter Samuelson 		no flags Details
View All

Description Peter Samuelson 2008-03-07 10:05:05 UTC 
Created attachment 14916 [details]
xorg.conf

nv 2.1.7 - Debian package 1:2.1.7-1.

When using DVI-D, my GeForce 6200 (NV44) detects the panel size as "1 x 1", which leads it to believe that all of the available modes are unsuitable.  Or this may be a symptom of it being unsure of which CRTC to use.  The same card and monitor work fine with a VGA cable.

I'm attaching xorg.conf and the two Xorg.0.log files, first with the VGA, second with DVI-D.  The device in question is NV(0).  I'm happy to test patches.
Comment 1 Peter Samuelson 2008-03-07 10:06:17 UTC 
Created attachment 14917 [details]
Xorg.0.log using DVI
Comment 2 Peter Samuelson 2008-03-07 10:06:57 UTC 
Created attachment 14918 [details]
Xorg.0.log using VGA
Comment 3 Peter Samuelson 2008-03-07 14:32:43 UTC 
Well ... everything works beautifully if the DVI cable is plugged in at boot time and the VGA cable is not.  When I reported the bug, I had booted the machine with the VGA cable and later switched to a DVI cable, and that is what failed.  Apparently the only problem is that the nv driver can't switch the CRTC 0 between VGA and DFP.

I'm happy now, so feel free to close this bug if you wish.
Comment 4 Aaron Plattner 2008-03-07 14:53:34 UTC 
Ah yeah, that explains it.  For chips prior to to the GeForce 8 series, the driver relies on the VBIOS to set up the display at boot.  Switching cables around for pre-G80 is outside the scope of the nv driver.  Marking WONTFIX.

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