Bug 28382

Summary: Dithering regression on Intel graphics with .38 kernels
Product: Drivers Reporter: Eric Appleman (erappleman)
Component: Video(DRI - Intel)Assignee: drivers_video-dri-intel (drivers_video-dri-intel)
Status: RESOLVED CODE_FIX    
Severity: normal CC: chris
Priority: P1    
Hardware: All   
OS: Linux   
URL: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/711568
Kernel Version: Subsystem:
Regression: No Bisected commit-id:
Attachments: Notice the distinct color bands on the background

Description Eric Appleman 2011-02-06 16:01:07 UTC 
When using the 2.6.38-rc kernels, there is session-wide color banding where gradients would otherwise appear.
Comment 1 Eric Appleman 2011-02-06 16:02:17 UTC 
See launchpad entry for logs.
Comment 2 Chris Wilson 2011-02-06 16:04:10 UTC 
commit 72389a33b8878e6091f7ab8080f5ed07054c7c39
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Sun Feb 6 15:50:52 2011 +0000

    drm/i915/lvds: Restore dithering on native modes for gen2/3
    
    A regression introduced in bee17e5 cleared the dithering bit for native
    modes on gen2/3.
    
    Bugzilla: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/711568
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Comment 3 Eric Appleman 2011-02-06 16:05:11 UTC 
Created attachment 46622 [details]
Notice the distinct color bands on the background