The issue was lack of bo caching for the video frames, causing clflush
every frame.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/618755
Title:
[i915gm] Intel Performance Regression on Xvideo on Lucid
Status in “xserver-xorg-video-intel” package in Ubuntu:
Fix Released
Bug description:
Binary package hint: xserver-xorg-video-intel
I see a significant performance degradation on Xorg/Xvideo on Lucid
compared with Karmic. I see the same issue on two Pentium Laptops, one
with Intel 915GM chipset, the other with a 855GME chipset.
In both cases on 1080 video, the cpu shown for Xorg increases
drastically. For example on the 915GM, Xorg goes from 5% on Karmic to
35% on Lucid.
In both cases, xvinfo shows the "Intel(R) Video Overlay" adapter.
The extra Xorg cpu makes 1080 marginal on one laptop, and unuseable on
the other, while both worked ok on Karmic.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-video-intel 2:2.9.1-3ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
Architecture: i386
Date: Mon Aug 16 12:12:21 2010
MachineType: FUJITSU LifeBook S7020
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcCmdLine: root=/dev/sda2
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: xserver-xorg-video-intel
dmi.bios.date: 09/16/2005
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.07
dmi.board.name: FJNB19C
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: AUUBE1AAA3322010
dmi.modalias:
dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.07:bd09/16/2005:svnFUJITSU:pnLifeBookS7020:pvr:rvnFUJITSU:rnFJNB19C:rvr:cvnAUUBE1AAA3322010:ct10:cvr:
dmi.product.name: LifeBook S7020
dmi.sys.vendor: FUJITSU
system:
distro: Ubuntu
codename: lucid
architecture: i686
kernel: 2.6.32-24-generic
[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile
915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03)
Subsystem: Fujitsu Limited. Device [10cf:12de]
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