** Description changed: 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. + 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 + 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 + 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 + 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 + #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:
-- Timer interrupt freezes, system becomes sluggish https://bugs.launchpad.net/bugs/665796 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
