You have been subscribed to a public bug: 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) ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade -- System Hangs when trying to kill a Window https://bugs.launchpad.net/bugs/1877890 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- 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