Bug 23368 - [915GM] Screen flickers in 2.6.31-rc6
Summary: [915GM] Screen flickers in 2.6.31-rc6
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: 7.4 (2008.09)
Hardware: Other All
: high major
Assignee: Jesse Barnes
QA Contact: Xorg Project Team
Keywords: NEEDINFO
: 23398 (view as bug list)
Depends on:
Reported: 2009-08-17 10:20 UTC by Sven Arvidsson
Modified: 2009-09-11 14:44 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

dmesg output (39.14 KB, text/plain)
2009-08-17 10:20 UTC, Sven Arvidsson
no flags Details
xorg log (33.74 KB, text/plain)
2009-08-17 10:20 UTC, Sven Arvidsson
no flags Details
Assume higher latency (533 bytes, patch)
2009-08-18 09:46 UTC, Jesse Barnes
no flags Details | Splinter Review

Description Sven Arvidsson 2009-08-17 10:20:02 UTC
Created attachment 28705 [details]
dmesg output

The screen on my Eee is flickering any time large parts of the screen is redrawn, such as when windows are moved around. This worked fine in -rc5.

The behaviour is similar to what I described here, but I have no idea if that's relevant or not:

System environment:
-- chipset: 910GML 
-- system architecture: 32-bit
-- Linux distribution: Debian unstable
-- Machine or mobo model: Asus Eee PC 701 4G (using latest BIOS from Asus)
-- Display connector: LVDS
-- xf86-video-intel: 926c7e7d30458078f8185d4e0b9b32b40102b3d5
-- mesa: 7.5
-- xserver: 1.6.3
-- drm: f7996165fffe0a835752e8b9bb6b4d81bba5c91d
-- kernel: 2.6.31-rc6
Comment 1 Sven Arvidsson 2009-08-17 10:20:22 UTC
Created attachment 28706 [details]
xorg log
Comment 2 Jesse Barnes 2009-08-18 09:46:11 UTC
Created attachment 28751 [details] [review]
Assume higher latency

Can you give this patch a try?
Comment 3 Sven Arvidsson 2009-08-18 11:55:23 UTC
With the patch, everything is back to normal. Thanks for solving the problem so fast! :)
Comment 4 Jesse Barnes 2009-08-24 15:42:01 UTC
*** Bug 23398 has been marked as a duplicate of this bug. ***
Comment 5 Sven Arvidsson 2009-08-28 07:21:30 UTC
Will the patch make it for 2.6.31?
Comment 6 Jesse Barnes 2009-08-28 10:17:10 UTC
I'll ping Eric and ask him to include it.
Comment 7 Sven Arvidsson 2009-09-06 06:58:32 UTC
This didn't make it for -rc9 did it? 

(If not, I'll ask the debian maintainers to add it.)
Comment 8 Jesse Barnes 2009-09-06 09:50:02 UTC
Yeah, doesn't look like it...
Comment 9 Jesse Barnes 2009-09-11 14:44:35 UTC
Fix in 2.6.31:

commit bcc24fb42585dc9f490cf7789a917358414bdab5
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Mon Aug 31 10:24:31 2009 -0700

    drm/i915: increase default latency constant (v2 w/comment)

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