This issue did not start after an upgrade. The system however was upgraded from Ubuntu 15.10. Yes, there were various kernels where this issue was not present.
-- 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/1604313 Title: Ubuntu 16.04: system freezes instead of suspend after undocking Status in linux package in Ubuntu: Incomplete Bug description: I'm using a Lenovo ThinkPad T450s. When the system was docked and then undocked, suspend won't work. Instead, the screen goes black, the system freezes and the fan runs on high speed. This problem persists with the (as of today) most recent kernel 4.4.0-31-generic #50. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-31-generic 4.4.0-31.50 ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: buerger 3534 F.... pulseaudio /dev/snd/pcmC1D0p: buerger 3534 F...m pulseaudio /dev/snd/controlC1: buerger 3534 F.... pulseaudio CurrentDesktop: Unity Date: Tue Jul 19 11:13:41 2016 HibernationDevice: RESUME=UUID=21eeaf61-c437-45dc-80e3-e581eb6f795c InstallationDate: Installed on 2015-09-15 (307 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: LENOVO 20BX000XGE ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic root=UUID=93fc15f9-4090-40ff-a3ac-a642833f1da2 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-31-generic N/A linux-backports-modules-4.4.0-31-generic N/A linux-firmware 1.157.2 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-04-22 (87 days ago) dmi.bios.date: 03/23/2016 dmi.bios.vendor: LENOVO dmi.bios.version: JBET57WW (1.22 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BX000XGE dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET57WW(1.22):bd03/23/2016:svnLENOVO:pn20BX000XGE:pvrThinkPadT450s:rvnLENOVO:rn20BX000XGE:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BX000XGE dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1604313/+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
