system freezes on high CPU load
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Undecided
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Unassigned |
Bug Description
It happened a few times now, when there's a process that requires high CPU usage after about a minute the system freezes completely. I see activity on hdd and hear the cpu working at full load, but the system does not respond to any command. The mouse freezes and if I try to move it I can only see some little movements after a while. No response to commands keyboard shortcuts to restart X server or to change to other consoles or Alt-Sys magic combinations.
It seems to only happen when both CPUs are at full load. (I think there is a priority on processes so the system doesn't freeze)
It happened the first time during a compiling, some time after giving the command "make".
Then it happened again during a bad command (too much high parameter in "change tempo" dialog) in Audacity.
Now it happened again loading a virtual Linux machine in VirtualBox, just after (virtual) login. Well, this time I was also playing music in Amarok, and downloading a torrent from Transmission! ;) But I always have at least these two applications running along a virtual machine, and other times it didn't froze!
Anyway, these are my specs:
Hardware:
Asus a6jc laptop with Intel Centrino Core Duo T2500 @ 2,00 GHz
RAM 1024 Mb
Nvidia GeForce Go 7300 - 512 Mb dedicated
OS:
lsb_release:
Distributor ID: Ubuntu
Release: 8.10
uname:
Linux daniele 2.6.27-11-generic #1 SMP Fri Dec 19 16:29:52 UTC 2008 i686 GNU/Linux
Hi i recommend you check the system temperature. The laptop might be overheating and then automatically shutting down. Additionally (to the below), you might want to try disabling / turning off cpu frequency scaling.
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Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.
Please include the following additional information, if you have not already done so (pay attention to lspci's additional options), as required by the Ubuntu Kernel Team:
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2. Please run the command "dmesg > dmesg.log" after a fresh boot and attach the resulting file "dmesg.log" to this bug report.
3. Please run the command "sudo lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.
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