Bug 756323

Summary: SNB crawling pixels bug with GL apps using alpha-test (such as Minecraft)
Product: [Fedora] Fedora Reporter: Chris Lord <chrislord.net>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 16CC: ajax, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
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Hardware: Unspecified   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2012-02-06 16:58:05 UTC Type: ---
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Description Chris Lord 2011-11-23 09:45:30 UTC 
When playing Minecraft, after a very short while (usually seconds), the window is filled with crawling pixels that show the colour of opaque background elements.

The same effect can be witnessed in other games, such as Super Tux Kart.

This affects all Sandybridge GPUs (Intel HD Graphics).

This is filed, detailed and fixed in fd.o Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=39730

It would be good to get this fix into the F16 kernel.
Comment 1 Josh Boyer 2011-11-23 12:45:54 UTC 
The two patches pointed to in the fdo bug are:

http://lkml.indiana.edu/hypermail/linux/kernel/1111.0/02876.html
http://lkml.indiana.edu/hypermail/linux/kernel/1111.0/02877.html

Neither one of them is in Linus' tree yet, and they don't appear to be in linux-next either.

I'll keep an eye on them.  In the meantime, Adam, what do you think?
Comment 2 Josh Boyer 2011-11-23 13:27:14 UTC 
OK.  I see they are included in Dave's latest pull request for Linus now
Comment 3 Dave Jones 2012-01-30 18:45:15 UTC 
These patches are in the 3.2 kernel, so this can probably be closed out ?