Bug 25223

Summary:

LVDS detected, but disabled on GeForce Go 7300

Product:

xorg

Reporter:

Martin Holec <martix.cz>

Component:

Driver/nouveau

Assignee:

Nouveau Project <nouveau>

Status:

RESOLVED INVALID

QA Contact:

Xorg Project Team <xorg-team>

Severity:

blocker

Priority:

highest

CC:

67b0226d, piotrdrag

Version:

7.5 (2009.10)

Hardware:

Other

OS:

All

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
dmesg	none
Xorg log	none
Forcibly try DDC on LVDS if i2c table index valid	none
Force the use of strap-based FP mode if present, and fp_no_ddc is true	none
log with modeset=0	none
log with modeset=1	none

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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