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pneula n00b
Joined: 16 Jan 2009 Posts: 37
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Posted: Wed May 29, 2013 8:53 am Post subject: [SOLVED] Intel graphics performance drop with kernel 3.8 |
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Hello gentoo people,
Maybe some of you could help to solve a considerable graphics performance drop from kernel 3.7.10-r1 to 3.8.13 using "Intel Corporation 2nd Generation Core Processor Famility Integrated Graphics Controller (rev 09)" with i965 driver. The outputs of glxinfo and xdriinfo don't change between the two kernels, but still even the glxgears performance drops from the usual 60 FPS to 15. I can't see any changes in kernel configuration which could cause this. Any ideas? Which diagnostics could help to get the usual graphics performance back?
Best wishes.
Last edited by pneula on Mon Sep 02, 2013 3:18 pm; edited 1 time in total |
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Hypnos Advocate
Joined: 18 Jul 2002 Posts: 2889 Location: Omnipresent
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Posted: Wed May 29, 2013 9:06 am Post subject: |
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Verify that direct rendering is working
Code: | # glxinfo | grep direct
direct rendering: Yes |
. Look for error messages from Xorg:
Code: | # grep EE /var/log/Xorg.0.log |
and from the kernel,
. My output from dmesg:
Code: | [drm] Initialized drm 1.1.0 20060810
[drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[drm] Driver supports precise vblank timestamp query.
fbcon: inteldrmfb (fb0) is primary device
i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 |
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pneula n00b
Joined: 16 Jan 2009 Posts: 37
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pneula n00b
Joined: 16 Jan 2009 Posts: 37
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Posted: Mon Sep 02, 2013 3:18 pm Post subject: |
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Eventually,
I understood to change my rendering to use UXA and got the former acceleration performance back:
Code: | USE="uxa -sna" emerge xf86-video-intel |
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