Public bug reported: Every few hours the desktop freezes. I can still login via ssh, htop shows one process running at 100%. The process is shown in red, indicating a kernel thread. No response to ctrl-alt-f1 or to service lightdm restart.
Graphics card is NVIDIA NVS 310. I've tried the NVIDIA drivers in various versions up to nvidia-current, and also nouveau (current bug report is with logfiles etc generated after a crash while running nouveau). Xorg.log shows a seg fault: [171809.988] (EE) [171809.988] (EE) Backtrace: [171809.988] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7fc8b9ccd848] [171809.988] (EE) 1: /usr/bin/X (0x7fc8b9b24000+0x1ad539) [0x7fc8b9cd1539] [171809.988] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fc8b8c20000+0x10340) [0x7fc8b8c30340] [171809.988] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7fc8b763f000+0x97ff0) [0x7fc8b76d6ff0] [171809.988] (EE) 4: /usr/lib/xorg/modules/libexa.so (0x7fc8b295f000+0x5356) [0x7fc8b2964356] [171809.988] (EE) 5: /usr/lib/xorg/modules/libexa.so (0x7fc8b295f000+0x57fb) [0x7fc8b29647fb] [171809.988] (EE) 6: /usr/lib/xorg/modules/libexa.so (0x7fc8b295f000+0x7e22) [0x7fc8b2966e22] [171809.988] (EE) 7: /usr/lib/xorg/modules/libexa.so (0x7fc8b295f000+0x1186a) [0x7fc8b297086a] [171809.988] (EE) 8: /usr/lib/xorg/modules/libexa.so (0x7fc8b295f000+0xe236) [0x7fc8b296d236] [171809.988] (EE) 9: /usr/lib/xorg/modules/libexa.so (0x7fc8b295f000+0xc028) [0x7fc8b296b028] [171809.988] (EE) 10: /usr/bin/X (0x7fc8b9b24000+0x133f56) [0x7fc8b9c57f56] [171809.988] (EE) 11: /usr/bin/X (0x7fc8b9b24000+0x12a3fe) [0x7fc8b9c4e3fe] [171809.988] (EE) 12: /usr/bin/X (0x7fc8b9b24000+0x55f0e) [0x7fc8b9b79f0e] [171809.988] (EE) 13: /usr/bin/X (0x7fc8b9b24000+0x59d9a) [0x7fc8b9b7dd9a] [171809.988] (EE) 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7fc8b7660ec5] [171809.988] (EE) 15: /usr/bin/X (0x7fc8b9b24000+0x451ee) [0x7fc8b9b691ee] [171809.988] (EE) [171809.988] (EE) Segmentation fault at address 0x0 [171809.988] (EE) Fatal server error: [171809.988] (EE) Caught signal 11 (Segmentation fault). Server aborting [171809.988] (EE) ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-71-generic 3.13.0-71.114 ProcVersionSignature: Ubuntu 3.13.0-71.114-generic 3.13.11-ckt29 Uname: Linux 3.13.0-71-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p', '/dev/snd/pcmC1D7p', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Wed Dec 16 08:30:46 2015 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-precise-amd64-20130203-1 InstallationDate: Installed on 2015-10-17 (59 days ago) InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50 IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. Precision Tower 7910 ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-71-generic root=UUID=8fb5292d-6961-420e-ac9b-3f468520a7de ro plymouth:debug splash quiet drm.debug=0xe PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.13.0-71-generic N/A linux-backports-modules-3.13.0-71-generic N/A linux-firmware 1.127.19 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2015-11-02 (43 days ago) dmi.bios.date: 09/26/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 0215PR dmi.board.vendor: Dell Inc. dmi.board.version: A03 dmi.chassis.type: 7 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA09:bd09/26/2015:svnDellInc.:pnPrecisionTower7910:pvr:rvnDellInc.:rn0215PR:rvrA03:cvnDellInc.:ct7:cvr: dmi.product.name: Precision Tower 7910 dmi.sys.vendor: Dell Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug nvs-310 trusty xorg ** Attachment added: "xorg log showing seg fault" https://bugs.launchpad.net/bugs/1526657/+attachment/4535496/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1526657 Title: desktop freeze, htop shows kernel thread at 100% cpu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1526657/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
