Thank you stuart. I'm afraid your solution does not apply to me. My freezes are instant, without any sluggish or strange mouse or keyboard behavior, and the system locks completely, including low-level functions such as Ethernet pings. I'm also not using an Nvidia card, nor any proprietary driver, and my PCI express slot is empty.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1228109 Title: [Lenovo ThinkCentre M91p] System freezes Status in “linux” package in Ubuntu: Expired Bug description: * Problem description: The system freezes completely. This includes screen, mouse, and keyboard including numlock light. Even after several weeks of testing I was not able to tie the freezes to a specific event, program, or behavior. There seem to be a few scenarios where freezes are more likely (see below), but they can essentially occur at any time. I have updated my bios and the system; this did not solve the problem. I have not yet tried the mainline kernel, since I am unsure which version to select. * Steps to reproduce: Run long-term measurement device remote control in Matlab (data collection; SCPI, low cpu load, some network, a couple GB RAM usage). The system typically freezes within 24 to 48 hours. I have also tried several other scenarios: - normal work with KDE (Kile, Thunderbird, Firefox, Inkscape, VLC, Dolphin): RARELY (~ once a month) - measurement device remote control in Matlab (memory, network). The following didn't seem to reproduce the problem: - running date + sleep in a bash loop. - running date + sleep in a bash loop within screen. - running ping constantly. - idle loop in Matlab (do nothing). - random data copying loop in Matlab (memory only). * Keeping CPU load high by inverting a some matrix in the data collection loop seems to prevent this problem. * Last working version: Kubuntu 11.10 * Additional information: - memory test came back negative (no problems) - crash is reproducible on a text console - could not obtain trace dump (system does not react to keyboard) Neither of the following fixed the problem: xserver-xorg-lts-quantal libgl1-mesa-dri-lts-quantal:i386 libgl1-mesa-glx-lts-quantal:i386 or fixing the "*BAD*gran_size" issue described in: http://my-fuzzy-logic.de/blog/index.php?/archives/41-Solving-linux-MTRR-problems.html ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.5.0-40-generic 3.5.0-40.62~precise1 ProcVersionSignature: Ubuntu 3.5.0-40.62~precise1-generic 3.5.7.20 Uname: Linux 3.5.0-40-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25. ApportVersion: 2.0.1-0ubuntu17.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: arnitz 2208 F.... pulseaudio /dev/snd/controlC0: arnitz 2208 F.... pulseaudio CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xfe520000 irq 44' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:10ec0662,17aa3070,00100101 HDA:80862805,17aa3070,00100000' Controls : 36 Simple ctrls : 16 Card1.Amixer.info: Card hw:1 'Audio'/'Plantronics Wireless Audio Plantronics Wireless Audio at usb-0000:00:1d.0-1.4, ' Mixer name : 'USB Mixer' Components : 'USB047f:d955' Controls : 4 Simple ctrls : 2 Date: Fri Sep 20 08:13:34 2013 HibernationDevice: RESUME=UUID=2f562564-0248-4280-a46b-9cd0f0e8e5e6 InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. MachineType: LENOVO 4524-AN4 MarkForUpload: True ProcEnviron: LANGUAGE= TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-40-generic root=UUID=af77f384-9007-4d2b-8395-5ada0dcfb93e ro quiet splash enable_mtrr_cleanup mtrr_spare_reg_nr=1 mtrr_gran_size=64K mtrr_chunk_size=256M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.5.0-40-generic N/A linux-backports-modules-3.5.0-40-generic N/A linux-firmware 1.79.6 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to precise on 2013-06-20 (91 days ago) dmi.bios.date: 10/16/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 9HKT54AUS dmi.board.vendor: LENOVO dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnLENOVO:bvr9HKT54AUS:bd10/16/2012:svnLENOVO:pn4524-AN4:pvrThinkCentreM91p:rvnLENOVO:rn:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: 4524-AN4 dmi.product.version: ThinkCentre M91p dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1228109/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
