Extra information: sudo kill -9 <pid-of-xorg-process> via ssh connection did restore the display in working order without restarting the system so I'm pretty sure this is caused by some kind of hang caused by xorg process. Plain kill without -9 did not do anything, though.
Perhaps this is caused by some race conditition while xorg is keeping some locks which cause keyboard not to work (e.g. Alt+Ctrl+F1) and the display does not update. After saying that, the system seems to be in some weird state where pretty much all my old X client processess are still running (e.g. Chrome, Opera, Thunderbird) even though the original xorg process does not exists anymore. Thunderbird seems to be eating 100% of a single core. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1803353 Title: Display freezes (possible i915 freeze/hang) Status in xorg package in Ubuntu: New Bug description: Xorg suddenly stops updating the display and CTRL+ALT+F1 does not work. The issue happens randomly and does not seem to be related to content being rendered. This time the display hang occurred while I was typing in gnome-terminal. I can successfully ssh into the system from another computer and run ubuntu-bug xorg while the display is frozen. Disconnecting the display port cable and reconnecting does not successfully restore the image. However, after disconnecting the cable and reconnecting, the monitor never resumed from DPMS suspend so the signal emitted did in fact change when I disconnected the cable. The problem occurs both with official lowlatency Ubuntu kernel and custom kernel built from vanilla kernel sources. I haven't found a way to deduce if this is in reality caused by kernel, xorg or the hardware. However, considering that this happens with many different kernel versions, I'd assume this is caused by xorg, instead. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3.1 Uname: Linux 4.18.0-memalloc-watchdog+ x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,regex,mousepoll,move,resize,imgpng,wall,animation,grid,fade,place,vpswitch,gnomecompat,session,workarounds,expo,scale,ezoom] Date: Wed Nov 14 15:23:50 2018 DistUpgraded: 2016-06-10 11:06:21,514 WARNING no activity on terminal for 300 seconds (Applying changes) DistroCodename: xenial DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. P8 series motherboard [1043:84ca] InstallationDate: Installed on 2015-02-23 (1360 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) MachineType: System manufacturer System Product Name ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-memalloc-watchdog+ root=UUID=254cacdb-f61b-45a6-9885-37afd2b598ce ro libata.noacpi=1 quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to xenial on 2016-06-10 (887 days ago) dmi.bios.date: 02/04/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1101 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8H77-M PRO dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1101:bd02/04/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-MPRO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: System manufacturer version.compiz: compiz 1:0.9.12.3+16.04.20180221-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.91-2~16.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~16.04.1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~16.04.1 version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Thu Sep 6 15:40:48 2018 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 41047 vendor DEL xserver.version: 2:1.19.5-0ubuntu2~16.04.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1803353/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
