Bug 11727

Summary: Latest Mesa + DRI is terrible slow on Intel i915
Product: Mesa Reporter: Lukas Hejtmanek <xhejtman>
Component: Drivers/DRI/i915Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED NOTABUG QA Contact:
Severity: normal    
Priority: medium    
Version: git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments: Output of LIBGL_DEBUG=verbose

Description Lukas Hejtmanek 2007-07-26 05:04:18 UTC
Latest Mesa and DRI (dri head 4175dd818110bd10d6d09190d30c271e89202b18 and mesa head 03ec41ddc51e539c989a546f33d22daa2af69095) is terrible slow on Intel. (glxgears is about 200FPS, ppracer runs at 3.6FPS, used to run on 1000FPS and 35FPS, resp.)
Comment 1 Michel Dänzer 2007-07-26 05:36:58 UTC
Maybe you're not getting hardware acceleration. Please attach (as opposed to paste) the output of

LIBGL_DEBUG=verbose glxgears 2>&1
Comment 2 Lukas Hejtmanek 2007-07-26 05:39:43 UTC
Created attachment 10886 [details]
Output of LIBGL_DEBUG=verbose
Comment 3 Michel Dänzer 2007-07-26 06:00:14 UTC
Looks fine... can you try isolating the problem with git-bisect?
Comment 4 Lukas Hejtmanek 2007-07-26 07:12:40 UTC
I will give a try this weekend.
Comment 5 Lukas Hejtmanek 2007-07-26 13:39:59 UTC
OK, the problem is that the latest Intel driver disables Tiling on i915 (due to XV corruption and lockup). Disabled tiling of depth and back buffers causes terrible slow down. So this bug can be closed.
Comment 6 Adam Jackson 2009-08-24 12:27:26 UTC
Mass version move, cvs -> git

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