I have tested with 4.10 (linux- image-4.10.0-041000-generic_4.10.0-041000.201702191831_amd64) and can confirm that the lockup can be reproduced in this kernel as well.
Some additional information that may help: 1. This is a multiboot machine and I have Arch and Manjaro installed. I can reproduce the lockup on both (kernel 4.9x) so this definitely appears to be something to do with kernel. 2. The problem seems to also be network related as the lockups occur most frequently with streaming video. Kernel 4.4x LTS is rock-solid and does not exhibit this behavior. Let me know what else I can do to help troubleshoot and identify the issue. Thanks. ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => 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/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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