Public bug reported: Since updating to Ubuntu 10.10 (Maverick), my 5 y/o Sony VAIO Laptop experiences periodic short lockups (<1s) every 10 seconds.
During the lockup, everything stands still. No kind of output (mouse cursor movement, text output in console etc.) takes place, further evidenced by the fact that if sound is playing, the soundcard stutters on what seems to be the last sample in the buffer. Then everything resumes and works normally until the next lockup. I wrote a small python script that constantly outputs the current system time to a file and Matlab to draw a plot of the reported time differences. The plot can be found attached to this bug or here: http://dl.dropbox.com/u/6617799/hangplot.png (the python script that generates the data can be found at http://dl.dropbox.com/u/6617799/dumptime.py) Assuming that system time is unaffected by the problem, you can see that the time between soft lockups is about 10 seconds. Here are the exact differences: 10.5005 10.7519 10.5282 10.7829 10.5291 10.7840 10.4960 10.8160 10.4640 10.8840 Duration of a lockup seems to alternate between (very roughly) 0.25s and 0.5s: 0.2539 0.4277 0.3080 0.4437 0.2969 0.4394 0.2817 0.4602 0.2723 0.4935 0.2259 Please note that this is not an exact measurement, may contain sampling errors and that it works on the assumption that the system time as returned by the system call is unaffected. I just wanted a quick way to estimate intervals and duration of the lockups. Let me know if I can provide anything else! ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: linux-image-2.6.35-22-generic 2.6.35-22.33 Regression: Yes Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4 Uname: Linux 2.6.35-22-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ejelly 3139 F.... pulseaudio /dev/snd/pcmC0D0p: ejelly 3139 F...m pulseaudio /dev/snd/timer: ejelly 3139 f.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with AD1981B at irq 9' Mixer name : 'Analog Devices AD1981B' Components : 'AC97a:41445374' Controls : 28 Simple ctrls : 20 Date: Sun Oct 10 17:15:39 2010 HibernationDevice: RESUME=UUID=96440400-451e-0100-0000-000002000000 MachineType: Sony Corporation PCG-TR5MP(CH) PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=UUID=b93066f0-fe9a-4af0-9a57-d6b0b45e6f44 ro splash quiet ProcEnviron: LANGUAGE=en PATH=(custom, user) LANG=de_DE.UTF-8 SHELL=/bin/zsh RelatedPackageVersions: linux-firmware 1.38 SourcePackage: linux dmi.bios.date: 11/28/2003 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: R0111G1 dmi.chassis.asset.tag: 4B1M0000000000000000001a0000 dmi.chassis.type: 10 dmi.chassis.vendor: Sony Corporation dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR0111G1:bd11/28/2003:svnSonyCorporation:pnPCG-TR5MP(CH):pvrJ000BNDH:cvnSonyCorporation:ct10:cvrN/A: dmi.product.name: PCG-TR5MP(CH) dmi.product.version: J000BNDH dmi.sys.vendor: Sony Corporation ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 kernel-uncat maverick needs-upstream-testing regression-release -- Periodic machine lockups, every 10 seconds https://bugs.launchpad.net/bugs/657744 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
