Bug 25223 - LVDS detected, but disabled on GeForce Go 7300
Summary: LVDS detected, but disabled on GeForce Go 7300
Status: RESOLVED INVALID
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: 7.5 (2009.10)
Hardware: Other All
: highest blocker
Assignee: Nouveau Project
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-11-22 05:23 UTC by Martin Holec
Modified: 2011-03-31 03:23 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:


Attachments
dmesg (48.13 KB, text/plain)
2009-11-22 05:24 UTC, Martin Holec
no flags Details
Xorg log (10.78 KB, text/plain)
2009-11-22 05:24 UTC, Martin Holec
no flags Details
Forcibly try DDC on LVDS if i2c table index valid (645 bytes, patch)
2009-11-23 15:23 UTC, Ben Skeggs
no flags Details | Splinter Review
Force the use of strap-based FP mode if present, and fp_no_ddc is true (1.18 KB, patch)
2009-11-23 15:24 UTC, Ben Skeggs
no flags Details | Splinter Review
log with modeset=0 (12.36 KB, text/plain)
2009-12-25 07:08 UTC, 67b0226d
no flags Details
log with modeset=1 (22.88 KB, text/plain)
2009-12-25 07:09 UTC, 67b0226d
no flags Details

Description Martin Holec 2009-11-22 05:23:36 UTC
Xorg doesn't start after boot. Internal display connected to LVDS fails, but external display with D-Sub works.
Tested on Fedora 12 LiveCD with nouveau.modeset=1.

Hardware: http://www.smolts.org/client/show/pub_63cc826b-b57b-401b-ad0c-a27b0cb5b5d3
Comment 1 Martin Holec 2009-11-22 05:24:22 UTC
Created attachment 31382 [details]
dmesg
Comment 2 Martin Holec 2009-11-22 05:24:47 UTC
Created attachment 31383 [details]
Xorg log
Comment 3 Ben Skeggs 2009-11-22 14:03:38 UTC
Does the display work with nouveau.modeset=0?  And, what resolution does your panel have?
Comment 4 Martin Holec 2009-11-23 07:29:26 UTC
No it doesn't. Resolution is 1024x768.
Comment 5 Ben Skeggs 2009-11-23 15:22:18 UTC
The info in the VBIOS about your panel is confusing for nouveau, we end up with *no* valid method for detecting your panel's mode.

Your VBIOS has a 1024x768 mode listed for your panel, and nouveau detects that it should use it if it's using those mode tables.  However, another VBIOS table tells nouveau to *not* use those mode tables.  I'll attach panel-strap-mode.diff to force the use of the tables.

Now, the entry for your panel gives a valid index into the DDC table so it's possible it reports an EDID that we should use.  I suspect this is probably the case here, and we make a bad decision on when to use DDC on your card.  I'll attach panel-ddc-mode.diff for this.

Can you try each patch separately and report which (if any) work for you.

Thanks!
Comment 6 Ben Skeggs 2009-11-23 15:23:09 UTC
Created attachment 31425 [details] [review]
Forcibly try DDC on LVDS if i2c table index valid
Comment 7 Ben Skeggs 2009-11-23 15:24:06 UTC
Created attachment 31426 [details] [review]
Force the use of strap-based FP mode if present, and fp_no_ddc is true
Comment 8 Ben Skeggs 2009-12-03 02:59:42 UTC
Any update?  This should be fixed in latest git too..
Comment 9 67b0226d 2009-12-25 07:00:20 UTC
(In reply to comment #8)
> Any update?  This should be fixed in latest git too..
I have a similar, if not the same problem. Your second patch already seems to be in git, and I also tried applying your first patch, but nothing changes. I have tried with both modeset=0 and modeset=1, Xorg.0.log and dmesg attached respectively.
Comment 10 67b0226d 2009-12-25 07:08:46 UTC
Created attachment 32292 [details]
log with modeset=0
Comment 11 67b0226d 2009-12-25 07:09:35 UTC
Created attachment 32293 [details]
log with modeset=1
Comment 12 Lucas Stach 2011-02-15 02:53:37 UTC
This report seems to be against a very old version of nouveau. Is this still an issue with recent nouveau?

If we get no status update within one month I will close this bug as unreproducible.
Comment 13 Lucas Stach 2011-03-31 03:23:44 UTC
Closing as we got no new info from reporter and the bug is against ancient version of nouveau.


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