Bug 14760 - "AVIVO: disable dithering on DFPs" introduces color banding. (xf86-video-ati)
Summary: "AVIVO: disable dithering on DFPs" introduces color banding. (xf86-video-ati)
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/Radeon (show other bugs)
Version: 7.3 (2007.09)
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: xf86-video-ati maintainers
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-02-29 15:17 UTC by Brian
Modified: 2008-02-29 19:36 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
lvds panels may require dithering (468 bytes, patch)
2008-02-29 15:27 UTC, Alex Deucher 		no flags Details | Splinter Review
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Description Brian 2008-02-29 15:17:10 UTC 
The commit named "AVIVO: disable dithering on DFPs"(46547ae8bdbc5c10f1fd028b95ec4c5c31a5b318  I believe) on xf86-video-ati introduced improper color output on my LVDS display. 

A gradient image, will show discrete bands going from the start color to the end color. 

That's the commit I traced it back to; The problem is on the current git as well. 

Chip: R500 x1400 mobility on a Dell e1505. 

Thanks.
Comment 1 Alex Deucher 2008-02-29 15:27:29 UTC 
Created attachment 14725 [details] [review]
lvds panels may require dithering

Does this patch fix it?
Comment 2 Brian 2008-02-29 15:59:41 UTC 
Yes works great. 

Thanks for the fix.
Comment 3 Alex Deucher 2008-02-29 19:36:52 UTC 
pushed: b069aadaa63a95d7a71b5cfbab83577b49501094

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