OK, I've spent hours testing various options. The bug is much harder to
reproduce in Ubuntu 12.10 because the default rendering method in Compiz 0.9.8
is the same as the workaround (1) listed at the top of the bug. To reproduce
the bug I had to force the rendering method that Compiz 0.9.7 uses:
CCSM > OpenGL >
Framebuffer object = OFF
Vertex buffer object = OFF
Always use buffer swapping = OFF
Then I could reproduce the bug. And this time I noticed that
glXWaitVideoSyncSGI is not returning. The spin is happening below
glXWaitVideoSyncSGI, but above uki_firegl_WaitVBlank (which returns
constantly). And because glXWaitVideoSyncSGI is never returning it means
we have little hope of even working around the bug in compiz. It's
happening 100% inside the fglrx driver, out of reach of compiz.
Interestingly even with the native compiz 0.9.8 rendering method I could
reproduce a similar spin in the glxgears process (not compiz). So again,
the problem applies to any OpenGL application.
If neither of the workarounds listed at the top of the bug work for you,
then please consider uninstalling fglrx and using the default radeon
driver instead. And if you haven't already, then upgrading to Ubuntu
12.10 might help, but you don't really need to because that's equivalent
to the workaround at the top of the bug.
Finally, I have contacted AMD directly and asked them to review the bug
because even their copy has not been touched since it was logged 5
months ago: http://ati.cchtml.com/show_bug.cgi?id=535
** Changed in: compiz
Status: Triaged => Invalid
** Changed in: compiz/0.9.8
Status: Triaged => Invalid
** Changed in: compiz-core
Status: Triaged => Invalid
** Changed in: fglrx-installer (Ubuntu)
Importance: Undecided => Critical
** Changed in: fglrx-installer-updates (Ubuntu)
Importance: Undecided => Critical
** Changed in: compiz (Ubuntu)
Status: Triaged => Invalid
** Changed in: gnome-shell (Ubuntu)
Status: Confirmed => Invalid
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to fglrx-installer in Ubuntu.
https://bugs.launchpad.net/bugs/969860
Title:
fglrx uses 100% CPU when screen turns off (spinning in
glXWaitVideoSyncSGI or glXSwapBuffers)
Status in Compiz:
Invalid
Status in Compiz 0.9.8 series:
Invalid
Status in Compiz Core:
Invalid
Status in AMD fglrx video driver:
Unknown
Status in The Ubuntu Power Consumption Project:
Fix Released
Status in “compiz” package in Ubuntu:
Invalid
Status in “fglrx-installer” package in Ubuntu:
Confirmed
Status in “fglrx-installer-updates” package in Ubuntu:
Confirmed
Status in “gnome-shell” package in Ubuntu:
Invalid
Bug description:
WORKAROUND (1):
1. Open Catalyst Control Center.
2. Go to 3D > More Settings.
3. Set "Wait for vertical refresh" to "On, unless application specifies".
And if that doesn't work, then also do:
4. Run "ccsm"
5. In Workarounds, enable "Force full screen redraw (buffer swap) on repaint".
WORKAROUND (2):
1. Run ccsm (from package compizconfig-settings-manager)
2. In OpenGL > Sync To VBlank = OFF
TEST CASE:
1. Monitor compiz CPU usage (from /proc/<pid of compiz>/stat or top in batch
mode)
2. In "brightness and lock" settings set "Turn screen off when inactive" to 1
minute
3. Wait until screen turns off
4. Move mouse or press a key to turn screen back on
5. Check the CPU usage from the monitor
ACTUAL RESULT:
When screen turns off compiz goes to 100%
When the screen turns back on, cpu usage drops immediately to a normal value
The graph attached shows %CPU of compiz with a sample per second. The graph
has been captured on a system with a Radeon HD5770 and fglrx if that matter
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:0.9.7.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: fglrx
.tmp.unity.support.test.0:
ApportVersion: 2.0-0ubuntu1
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Sat Mar 31 10:17:48 2012
DistUpgraded: 2012-02-01 00:15:24,616 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
MachineType: Gigabyte Technology Co., Ltd. GA-890GPA-UD3H
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-21-generic
root=UUID=cf89ba34-108b-404d-9804-32d54a1df2ea ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: Upgraded to precise on 2012-01-31 (59 days ago)
dmi.bios.date: 07/23/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: FD
dmi.board.name: GA-890GPA-UD3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrFD:bd07/23/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-890GPA-UD3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-890GPA-UD3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-890GPA-UD3H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.7.2-0ubuntu4
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu8
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
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