I downgraded the nvidia driver to nvidia-current-updates (304). The system locked-up again while playing videos but this time around it came back for a few seconds. While the mouse and keyboard were not responsive, I was able to see the video move rapidly and my conky scripts were updating for the same period. The logs above are from the session immediately following the hard reset. The only interesting info in the logs is reproproduced below:
Feb 18 10:10:37 rsk4 kernel: [ 459.762852] ohci-pci 0000:00:13.0: HC died; cleaning up Feb 18 10:10:37 rsk4 kernel: [ 459.972980] clocksource: timekeeping watchdog on CPU2: Marking clocksource 'tsc' as unstable because the skew is too large: Feb 18 10:10:37 rsk4 kernel: [ 459.972984] clocksource: 'hpet' wd_now: 2cf1234a wd_last: 882f4fcf mask: ffffffff Feb 18 10:10:37 rsk4 kernel: [ 459.972986] clocksource: 'tsc' cs_now: 1c80b7be591 cs_last: 1c797b32b32 mask: ffffffffffffffff Feb 18 10:10:37 rsk4 kernel: [ 459.973151] clocksource: Switched to clocksource hpet Feb 18 10:10:38 rsk4 kernel: [ 460.648506] snd_hda_intel 0000:00:14.2: spurious response 0x0:0x0, last cmd=0x10a0000 Feb 18 10:10:38 rsk4 kernel: [ 460.648515] snd_hda_intel 0000:00:14.2: spurious response 0x0:0x0, last cmd=0x10a0000 Feb 18 10:10:38 rsk4 kernel: [ 460.648831] snd_hda_intel 0000:00:14.2: spurious response 0x800:0x0, last cmd=0x10a0000 Feb 18 10:10:38 rsk4 kernel: [ 460.649108] snd_hda_intel 0000:00:14.2: spurious response 0x0:0x0, last cmd=0x10a0000 Feb 18 10:11:54 rsk4 gnome-session[6450]: message repeated 95 times: [ ERROR: Error querying target relations] Feb 18 10:11:56 rsk4 ntpd[1673]: Soliciting pool server 132.163.4.101 Feb 18 10:11:57 rsk4 ntpd[1673]: Soliciting pool server 138.236.128.112 Feb 18 10:11:58 rsk4 ntpd[1673]: Soliciting pool server 199.241.184.162 Feb 18 10:12:04 rsk4 gnome-session[6450]: ERROR: Error querying target relations -- 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/1665911 Title: Linux 4.8 hangs system when playing video Status in linux package in Ubuntu: Confirmed Bug description: I recently updated to the 16.04.2 LTS release and installed the new HWE stack which installed kernel 4.8. Ever since, my machine completely freezes when playing video (eg. Youtube). I have to power off or hard reset using physical buttons to recover. Nothing seems to be written to the logs. Please let me know how to get additional information to help diagnose the issue. Thanks. Release: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11 System: Host: rsk4 Kernel: 4.8.0-36-generic x86_64 (64 bit gcc: 5.4.0) Desktop: Unity 7.4.0 (Gtk 2.24.30) Distro: Ubuntu 16.04 xenial Machine: Mobo: ASUSTeK model: M5A99FX PRO R2.0 v: Rev 1.xx Bios: American Megatrends v: 2501 date: 04/07/2014 CPU: Quad core AMD FX-8350 Eight-Core (-HT-MCP-) cache: 8192 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 32107 clock speeds: max: 4000 MHz 1: 1400 MHz 2: 1400 MHz 3: 1400 MHz 4: 1400 MHz 5: 1400 MHz 6: 1400 MHz 7: 1400 MHz 8: 1400 MHz Graphics: Card: NVIDIA GK106 [GeForce GTX 650 Ti] bus-ID: 01:00.0 Display Server: X.Org 1.18.4 driver: nvidia Resolution: 1920x1080@60.00hz, 1920x1080@59.93hz GLX Renderer: GeForce GTX 650 Ti/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 378.13 Direct Rendering: Yes Audio: Card-1 NVIDIA GK106 HDMI Audio Controller driver: snd_hda_intel bus-ID: 01:00.1 Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA) driver: snd_hda_intel bus-ID: 00:14.2 Sound: Advanced Linux Sound Architecture v: k4.8.0-36-generic Network: Card-1: Intel 82541PI Gigabit Ethernet Controller driver: e1000 v: 7.3.21-k8-NAPI port: d000 bus-ID: 05:05.0 IF: eth1 state: up speed: 1000 Mbps duplex: full mac: <filter> Card-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169 v: 2.3LK-NAPI port: b000 bus-ID: 09:00.0 IF: eth0 state: down mac: <filter> Drives: HDD Total Size: 740.2GB (42.4% used) ID-1: /dev/sda model: SPCC_Solid_State size: 240.1GB temp: 30C ID-2: /dev/sdb model: ST500DM002 size: 500.1GB temp: 27C Partition: ID-1: / size: 34G used: 13G (40%) fs: ext4 dev: /dev/sda1 RAID: No RAID devices: /proc/mdstat, md_mod kernel module present Sensors: System Temperatures: cpu: 28.0C mobo: 19.4C gpu: 0.0:35C Fan Speeds (in rpm): cpu: 0 fan-1: 1308 fan-2: 1028 fan-3: 0 Info: Processes: 284 Uptime: 6 min Memory: 1564.9/32075.1MB Init: systemd runlevel: 5 Gcc sys: 5.4.0 Client: Shell (bash 4.3.461) inxi: 2.2.35 --- ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: rehan 3527 F.... pulseaudio /dev/snd/controlC0: rehan 3527 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=796bfa06-20c4-4486-b4b3-6ea3ed8e0a7b InstallationDate: Installed on 2012-11-12 (1558 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328) IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. MachineType: To be filled by O.E.M. To be filled by O.E.M. NonfreeKernelModules: nvidia Package: linux (not installed) ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-36-generic root=UUID=6cbf5176-699e-40cd-8119-3e1802a1e70a ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11 RelatedPackageVersions: linux-restricted-modules-4.8.0-36-generic N/A linux-backports-modules-4.8.0-36-generic N/A linux-firmware 1.157.8 RfKill: Tags: xenial Uname: Linux 4.8.0-36-generic x86_64 UpgradeStatus: Upgraded to xenial on 2016-09-04 (167 days ago) UserGroups: adm cdrom dip lp lpadmin mythtv plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/07/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2501 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: M5A99FX PRO R2.0 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: To Be Filled By O.E.M. 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:bvnAmericanMegatrendsInc.:bvr2501:bd04/07/2014:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A99FXPROR2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: To be filled by O.E.M. 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