[i915gm] [i915] Major performance regression in Karmic

[Matthew Pirocchi]

Binary package hint: xserver-xorg-video-intel

I installed the Karmic beta on my laptop, and performance is now very choppy. In particular, Gnome-Do's "Docky" and compiz effects are extremely choppy.

In Jaunty, I was able to fix this by adding 'Option "MigrationHeuristic" "greedy"' under the 'Device' section in xorg.conf. This no longer works in Karmic (as far as I can tell from google, this is because of the switch to UXA mode). Is there any UXA parallel to greedy MigrationHeuristics?

ProblemType: Bug
Architecture: i386
Date: Fri Oct 2 19:13:52 2009
DistroRelease: Ubuntu 9.10
MachineType: Dell Inc. Inspiron 1200
Package: xserver-xorg-video-intel 2:2.8.1-1ubuntu2
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   3.3V 32-bit PC Card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-11-generic root=UUID=8abe333a-ee72-4293-bf94-1e3451540d70 ro quiet splash
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.38-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu6
 libdrm2 2.4.13-1ubuntu1
 xserver-xorg-video-intel 2:2.8.1-1ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090825.fc74e119-0ubuntu2
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-11-generic i686
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 03/10/2005
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A02
dmi.board.name: 0C8864
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA02:bd03/10/2005:svnDellInc.:pnInspiron1200:pvr:rvnDellInc.:rn0C8864:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1200
dmi.sys.vendor: Dell Inc.
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.31-11-generic

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03)
     Subsystem: Dell Device [1028:01a6]

[Bryce Harrington (bryce)]

Can you check if you're also seeing 100% CPU on Xorg when experiencing this performance regression? If so, perhaps you are actually seeing bug 439138

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

[Matthew Pirocchi (matthew-pirocchi)]

Oops, sorry about that. My System Monitor wasn't working for a while. No, I'm not seeing 100% CPU on Xorg--in fact, CPU seems to be more or less unaffected by this performance regression. Let me know if you need anything else.

[Matthew Pirocchi (matthew-pirocchi)]

This bug seems to occur when surfaces between 1009 and 1024 pixels in either width or height are drawn. See this bug for reference:
https://bugs.launchpad.net/docky/+bug/480267

This comment in particular:
https://bugs.launchpad.net/docky/+bug/480267/comments/6

[Geir Ove Myhr (gomyhr)]

This bug report has been inactive for quite some time and in the meantime Ubuntu has moved along. I hope the reported problem has been resolved in the current version of Ubuntu. If it has not and there are people willing to follow up with information collecting and testing, it is best to file a new bug report with the latest Ubuntu development version (currently 10.04, but soon 10.10), using the ubuntu-bug command if possible. Feel free to mention the bug number of this bug.

We are sorry that we are not always have the capacity to look at all reported bugs in a timely manner. Occationally we have to purge old bug reports where no progress has been made, whether it is due to reporter not being able to respond or lack of manpower on the Ubuntu side, in order to keep our list of "active" bugs current. Sorry for the inconvenience this may cause.

Here are a few tips that will increase the chances that your bug gets priority:
* Read https://wiki.ubuntu.com/X/Reporting
* Browse https://wiki.ubuntu.com/X and see if there is some relevant information for you problem
* Respond quickly to questions from triagers
* Try changing things to see if the behaviour changes, e.g.
  * A new mainline kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D (more information at https://wiki.ubuntu.com/KernelTeam/MainlineBuilds)
  * The xorg-edgers PPA: https://launchpad.net/~xorg-edgers/+archive/ppa
  * Various options in `/etc/X11/xorg.conf` (see `man intel`)
* Browse other bug reports to see if you find a similar one and provide the information that is being asked for there.