Daniel Arnitz, thanks for the remote capture. However, no crashing that I saw. I'll mark Confirmed for now so someone else may review. Have you had a chance to test the Saucy enablement stack as per https://wiki.ubuntu.com/Kernel/LTSEnablementStack to see if things improve for you?
** Changed in: linux (Ubuntu) Status: Expired => Confirmed -- 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: Confirmed 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