Periodic hangs/high cpu usage
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned |
Bug Description
My computer goes into a soft hang every few seconds. A key press or mouse movement wakes the system up but causes high cpu load >50%. No errors are displayed in dmesg or other logs. The last kernel which worked well for me was feisty 2.6.20-16. This seems to be due to cpu frequency scaling in newer kernels. With the latest hardy kernel, the system is able to boot completely. The problem still occurs in X and during shutdown. Booting with "nohz=off" seems to stop the problem from occurring. With gutsy kernels, the system hangs multiple times during boot or shutdown requiring a key press to continue.
Hardware:
Samsung R20 laptop, Core Duo T2250 1.73GHz, 768MB, Ati X1250 IGP
This problem has been reported in the forums before but I didn't find any bug report, e.g.
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Changed in linux: | |
assignee: | nobody → ubuntu-kernel-team |
importance: | Undecided → Medium |
status: | New → Triaged |
Please Check this upstream bug: bugzilla. kernel. org/show_ bug.cgi? id=9339
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