I have exactly the same problem in both an Ubuntu 14.04 that I use at work and a Debian Jessie that I use at home, and the software is up to date. Both systems have a "VGA compatible controller: NVIDIA Corporation GF119 [NVS 310] (rev a1)" and two monitors. After the problem shows up, I can login into my system through ssh, but the console is dead.
The problem never happens when I am using the system, only when the screen saver takes control and monitors turn off. I am not familiar with the guts of the screen saver and why the monitors turns off: one possibility is the video signal going away during the screen save operation; another is the computer explicitly asking the monitor to turn off. Anyway, the fact is that the monitor turns off and that may cause the problem. I found a work around at work which virtually made the problem go away: I have the option (on the special monitors I use at work) to never turn them off, even when there is no video signal coming from the computer. When I activate this monitor feature, the problem goes away. At home, however, my monitors do not have this feature and I have the dead console problem every few days. At work, in the last 6 months (and after never turning my monitors off) I have had the dead console problem just once, and that could be a different problem. So, my conclusion is that the problem happens exactly when the screen saver takes control and the monitor turns off. Hope that help you guys solve the problem. My current Debian kernel version is “Linux version 3.16.0-4-amd64 (debian-ker...@lists.debian.org) (gcc version 4.8.4 (Debian 4.8.4-1) ) #1 SMP Debian 3.16.7-ckt20-1+deb8u2 (2016-01-02)” -- 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/1526657 Title: desktop freeze, htop shows kernel thread at 100% cpu Status in linux package in Ubuntu: Incomplete Bug description: 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. 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