Bug 24750

Summary: [i915 bisected] X only has sw rasterization on 945GM/945GME caused by a mesa commit
Product: Mesa Reporter: zhao jian <jian.j.zhao>
Component: Drivers/DRI/i915Assignee: Eric Anholt <eric>
Status: VERIFIED DUPLICATE QA Contact:
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments: xorg.0.log

Description zhao jian 2009-10-27 03:19:18 UTC 
Created attachment 30734 [details]
xorg.0.log

System Environment:
--------------------------
Arch    i386
Platform        945GM 945GME
Libdrm:		(master)0d7ad7e43ca212b1e9f16cd18f36493cab455e61
Mesa:		(master)5241b9568c1f97eb9aca8be5eb7a3ef659d9917f
Xserver:		(master)9a2f6135bfb0f12ec28f304c97917d2f7c64db05
Xf86_video_intel:	(master)751e0a3e4576bbf4bffa56bbd6d4de28f10db98e
Kernel:       (master)012abeea669ea49636cf952d13298bb68654146a

Bug detailed description:
-------------------------
With the newest commits in mesa, when start X there is only software rasterization, I bisected it and found it was caused by commit in mesa. But it works well on GM45 and G45.
commit 2d17dbfb5346b6d75e87c839148cbe125bf5cd6d
Author: Eric Anholt <eric@anholt.net>
Date:   Thu Jul 9 09:32:21 2009 -0700

    intel: Keep track of x,y offsets in miptrees and use them for blitting.

    By just using offsets, we confused the hardware's tiling calculations,
    resulting in failures in miptree validation and blit clears.

    Fixes piglit fbo-clearmipmap.

    Bug #23552. (automatic mipmap generation)

Reproduce steps:
----------------
1.xinit&
2.glxinfo
Comment 1 Ian Romanick 2009-10-27 10:41:09 UTC 

*** This bug has been marked as a duplicate of bug 24734 ***
Comment 2 zhao jian 2009-10-29 19:14:57 UTC 
It now works well with the newest code. 
Libdrm:         (master)0d7ad7e43ca212b1e9f16cd18f36493cab455e61
Mesa:           (master)59b29516af2d4d8f83723559921a3709eb77a7d2
Xserver:                (master)fab74d1081270fb8f1d231e6e10d10aa33e164da
Xf86_video_intel:       (master)10946118dd3a63f1375a1bfde0b2f0542a93c1c2

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