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[Bug 851667] [NEW] compiz crashes when high CPU load and window decorations are lost/strange window behaviour


Public bug reported:

When I have high I/O and CPU load - pls also see following top output -,
for example a complicated MySQL query, compiz crashes, mostly when
switching between workspaces, but sometimes also under other conditions.
The window decorations are lost, strange foreground/background bahaviour
of the windows, etc. (pls also see the attached screenshot).

top - 09:58:48 up 57 min,  4 users,  load average: 2.81, 2.87, 2.41
Tasks: 207 total,   4 running, 203 sleeping,   0 stopped,   0 zombie
Cpu(s):  4.9%us,  0.8%sy,  0.0%ni, 37.0%id, 57.2%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   3355048k total,  3245488k used,   109560k free,   121804k buffers
Swap:  9871900k total,        0k used,  9871900k free,  1433404k cached

I found some suggestions to e.g. run compiz --replace from a terminal,
but what in the end really worked for me is to choose
System/Settings/Layout (hope this is the correct english term for
that...), observe that under Visual Effects "None" is set and change it
back to "Normal". Sometimes compiz successfully restarts, sometimes it
won't do so on the first try, but at least everything will go back to
"normal", without compiz. Of course, in some cases, I can't use the
panel anymore and therefore only restarting gdm from the command line
solves the problem.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+5ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-33.72-generic
Uname: Linux 2.6.32-33-generic i686
NonfreeKernelModules: fglrx
Architecture: i386
Date: Fri Sep 16 09:51:35 2011
MachineType: System manufacturer System Product Name
ProcCmdLine: root=UUID=836a5f3c-13c4-4176-b045-c0a9d53c1f6f ro quiet splash
SourcePackage: xorg
Symptom: display
dmi.bios.date: 11/26/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1611
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5Q
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1611:bd11/26/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5Q:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
 distro:             Ubuntu
 codename:           lucid
 architecture:       i686
 kernel:             2.6.32-33-generic

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: apport-bug corruption i386 lucid

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  compiz crashes when high CPU load and window decorations are
  lost/strange window behaviour

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