I have this same problem with the UI freezing up. It always occurs when I resize a window, although not every time I resize a window. The app running inside the window isn't always the same, it is more often a code editor or a web browser, or a zoom meeting. The result is that the UI freezes up completely, although audio continues running so if I am on a video call I can still talk to people, or if I am playing something with audio, I can continue to hear it. Something seems to be going on with the machine because after a few seconds the I hear the fan turning on.
I'm running an up to date 20.04.1 LTS and the kernel is 5.4.0-58-generic. GNOME version is 3.36.8, windowing X11 and it's a 64-bit install. My laptop is Hewlett-Packard HP ZBook 17 G2/2255, BIOS M70 Ver. 01.12 09/23/2015 -- 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/1574612 Title: Random hangs Status in linux package in Ubuntu: Triaged Bug description: System hangs randomly. This mostly occurs anywhere between 15 minutes and a few hours after boot. Couldn't figure out the trigger. Happened while viewing YouTube, using Spotify switching to Eclipse etc. SSH still works, so I can get to the machine if the lockup occurs. That's how I submitted the bug. All screens freeze though, while audio keeps on working (like music from Spotify or sound from a YouTube video). The only thing that seems to keep working UI-wise is the mouse pointer. Had memtest running for half an hour without problems. The issue occurs multiple times a day. Issue doesn't seem to be triggered if I remove linux-image-4.2.0-35-generic and go back to linux-image-4.2.0-16-generic. Did use the linux-image-4.2.0-16-generic kernel for a few days without issues. The kern.log contains some stacktraces with the method being 'schedule'. This is around the time the hang occurs. See extra debug information for more info. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-35-generic 4.2.0-35.40 ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5 Uname: Linux 4.2.0-35-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: serrie 1815 F.... pulseaudio /dev/snd/pcmC0D0c: serrie 1815 F...m pulseaudio /dev/snd/controlC0: serrie 1815 F.... pulseaudio Date: Mon Apr 25 13:56:48 2016 InstallationDate: Installed on 2016-04-12 (13 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) IwConfig: docker0 no wireless extensions. enp4s0 no wireless extensions. lo no wireless extensions. MachineType: System manufacturer System Product Name ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=c15a8aa0-fb21-495c-bbc6-ea4f2018dc1f ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.2.0-35-generic N/A linux-backports-modules-4.2.0-35-generic N/A linux-firmware 1.149.3 RfKill: SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2016-04-22 (3 days ago) dmi.bios.date: 01/27/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0505 dmi.board.asset.tag: Default string dmi.board.name: B150M-A D3 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0505:bd01/27/2016:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnB150M-AD3:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1574612/+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
