It looks like this has been fixed upstream. I will close it. If the
problem still occurs, please reopen it.
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/665796
Title:
Intel Core i7 - Timer interrupt freezes, high CPU usage, system
becomes sluggish
Status in linux package in Ubuntu:
Invalid
Bug description:
Since upgrading to Maverick, I'm frequently observing instances of the
timer interrupts suddenly stopping being processed (or even produced?)
for a few minutes. The system becomes sluggish as a whole, all CPU
cores go high on Sys% usage. This continues for 3-5 minutes, then
suddenly goes back to normal, just like how it started.
It is certainly related to the timer interrupt: If I continuously 'cat
/proc/interrupts' (or just run it under 'watch') during the time the
system is affected, interrupt 0 (IR-IO-APIC-edge timer) stays frozen
until the problem goes away. No messages appear on dmesg or in
/var/log/kern.log.
The problem always starts at random, with no particular cause, but it
seems more frequent when making heavy use of both sound and graphics
at the same time. It is very common to happen when I start playing
some game on Wine. It seems to also vanish at random after 3-5 minutes
have passed, but zapping the X server seems to a way to restore the
normal behaviour (it happened twice until now, I need more tests to
confirm).
The system is:
Processor: Intel Core i7 930 (2.8 GHz, 4 cores × 2 threads)
Mainboard: Intel DX58SO Extreme
Memory: 6 GiB
Storage: 3 × 1 TB Samsung HardDisks on a RAID 5 array, LVM on top.
Video: nVidia GTX 460 (with proprietary drivers)
I don't know what more I can say about this issue, but feel free to
ask; I'm willing to provide as much information as possible to have
this fixed.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.35
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: juliano 2781 F.... kmix
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf0000000 irq 22'
Mixer name : 'Realtek ALC889'
Components : 'HDA:10ec0889,80860022,00100004'
Controls : 42
Simple ctrls : 24
Date: Sun Oct 24 04:25:13 2010
Frequency: I don't know.
HibernationDevice: RESUME=UUID=4f433bf6-748e-432d-b93f-de4d0e693b91
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic
root=/dev/mapper/Nagisa1-Root ro rootdelay=5
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
RelatedPackageVersions: linux-firmware 1.38
RfKill:
SourcePackage: linux
UserAsoundrc:
#pcm.!default plug:hw:0
#ctl.!default hw:0
dmi.bios.date: 08/30/2010
dmi.bios.vendor: Intel Corp.
dmi.bios.version: SOX5810J.86A.5456.2010.0830.0013
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DX58SO
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE29331-703
dmi.chassis.type: 2
dmi.modalias:
dmi:bvnIntelCorp.:bvrSOX5810J.86A.5456.2010.0830.0013:bd08/30/2010:svn:pn:pvr:rvnIntelCorporation:rnDX58SO:rvrAAE29331-703:cvn:ct2:cvr:
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