Thank you for taking the time to report this bug and helping to make Ubuntu better. It sounds like some part of the system has crashed. To help us find the cause of the crash please follow these steps:
1. Look in /var/crash for crash files and if found run: ubuntu-bug YOURFILE.crash Then tell us the ID of the newly-created bug. 2. If step 1 failed then look at https://errors.ubuntu.com/user/ID where ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine. Do you find any links to recent problems on that page? If so then please send the links to us. 3. If step 2 also failed then apply the workaround from bug 994921, reboot, reproduce the crash, and retry step 1. Please take care to avoid attaching .crash files to bugs as we are unable to process them as file attachments. It would also be a security risk for yourself. Current LTS 20.04 Focal Fossa might be more stable for you. -- 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/1877890 Title: System Hangs when trying to kill a Window Status in linux package in Ubuntu: Incomplete Bug description: Dear Sirs, I'm a long term user of Ubuntu, I run a Client/Server system that my clients expect to be very stable. I ran under Trust Tahr for a long while with great success and no Hangups at all. I recently upgraded to Bionic Beaver and I find that I have a number of Hangups. They seem to occur mostly when switching between different users. The latest one that occurred last night that I want to show you here was caused by something else. I was watching a video from Youtube under Firefox. At the end of it I clicked the upper right hand button of the window to kill the screen. At this point the system froze on me. I could move the mouse around but none of the keys worked. I used the SysrRq - Magic Key combination to get the following information ALT + PrtScrn, ALT + CREISUB The system re-booted and gave me the following files in /var/crash 4096 May 9 23:38 202005092338 349 May 10 11:01 kexec_cmd 25387 May 9 23:39 linux-image-5.3.0-51-generic-202005092338.crash 69696 May 9 23:38 dmesg.202005092338 291014103 May 9 23:38 dump.202005092338 I used the crash program with the Symbols file and in the backtrace section under the exception line it says: exception RIP mwait_idle+132 in the disassembly of mwait_idle the line at +132 is mov %gs:0x72774cb4(%rip),%r12d # 0x10350 Any information that I can supply to you I will be glad to in order to aid you in solving this problem. I'm fairly computer literate and so I can follow any directions that you want to give to me. I have enjoyed using Ubutnu for many years but I do need a Stable environment for my Development work and for my users satisfaction. Yours truly, Frank Krauss ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.37 ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18 Uname: Linux 5.3.0-51-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.14 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Sun May 10 13:19:54 2020 InstallationDate: Installed on 2020-04-20 (19 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ubuntu-release-upgrader Symptom: release-upgrade UpgradeStatus: No upgrade log present (probably fresh install) --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.14 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: fkrauss 1808 F.... pulseaudio /dev/snd/controlC0: fkrauss 1808 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2020-04-20 (20 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) IwConfig: ens2 no wireless extensions. lo no wireless extensions. Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 nouveaudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-51-generic root=UUID=b52c713d-a2a9-4b17-8eed-79a031a415e8 ro quiet splash zswap.enabled=1 zswap.compressor=lz4 crashkernel=512M-:192M vt.handoff=1 idle=nomwait ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18 RelatedPackageVersions: linux-restricted-modules-5.3.0-51-generic N/A linux-backports-modules-5.3.0-51-generic N/A linux-firmware 1.173.17 RfKill: Tags: bionic Uname: Linux 5.3.0-51-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo video _MarkForUpload: True dmi.bios.date: 02/08/2010 dmi.bios.vendor: Intel Corp. dmi.bios.version: PRG3110H.86A.0070.2010.0208.1351 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: DG31PR dmi.board.vendor: Intel Corporation dmi.board.version: AAD97573-306 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorp.:bvrPRG3110H.86A.0070.2010.0208.1351:bd02/08/2010:svn:pn:pvr:rvnIntelCorporation:rnDG31PR:rvrAAD97573-306:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1877890/+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