Bug 24444

Summary:

Low indexes in gamma table garbaged (with xserver 1.7)

Product:

DRI

Reporter:

maximlevitsky

Component:

DRM/Intel

Assignee:

Eric Anholt <eric>

Status:

CLOSED FIXED

QA Contact:

Severity:

normal

Priority:

high

Version:

XOrg git

Hardware:

Other

OS:

All

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
screenshot that I forgot...	none

Description maximlevitsky 2009-10-10 09:10:24 UTC

After updating to git master of vanilla kernel, bd381934bf13ccb1af2813ae26c6fe00ec85d254 (2.6.32-rc3+)

Screen color output look bizarre (screen shot with camera attached).
In fact normal screen-shots (within computer) don't show any problem, when viewing them in older 2.6.31 kernel.

It looks like gamma table got corrupted.
This isn't related to 3D, and even GDM shows that behavior.
More than that, even during shutdown, usplash shows corrupted colors.

Note that during boot colors are normal, thus I assume that during X startup gamma table gets corrupted.

Comment 1 maximlevitsky 2009-10-10 11:06:05 UTC

I had reverted two suspicious commits in kernel tree, and problem gone.

068143d38804825d59d951a192cfadd2e22f457d.
drm/fb: add setcmap and fix 8-bit support.


drm/fb: add more correct 8/16/24/32 bpp fb support.
b8c00ac5b50b54491657f8b6740db1df50149944.

Comment 2 maximlevitsky 2009-10-10 14:28:35 UTC

In fact the first commit is the source of the bug. I tested this, and also confirmed on mailing list.


068143d38804825d59d951a192cfadd2e22f457d drm/fb: add setcmap and fix 8-bit support.

Comment 3 maximlevitsky 2009-10-10 16:34:56 UTC

Created attachment 30263 [details]
screenshot that I forgot...

Comment 4 Gordon Jin 2009-10-11 18:07:06 UTC

According to intel-gfx mailing list discussion, this only happens with xserver 1.7, and fine with 1.6.

A fix from Dave: http://lists.freedesktop.org/archives/intel-gfx/2009-October/004488.html

Comment 5 maximlevitsky 2009-10-16 22:08:53 UTC

This fix indeed helps for the xserver. however, usplash still shows in wrong colors, and doesn't depend on x startup:


Testcase:
If run the system without splash, and break with init=/bin/bash, then I start the splash with 'usplash' command, and see wrong colors.

Comment 6 maximlevitsky 2009-11-07 11:21:52 UTC

Fixed in drm-intel-next

Comment 7 maximlevitsky 2010-06-29 13:22:58 UTC

This was fixed long time ago.
I mark it such now

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