*** This bug is a duplicate of bug 1861837 *** https://bugs.launchpad.net/bugs/1861837
I am also seeing exactly this bug on older hardware (Lenovo G560) using up to date kernel, so this can not be a duplicate of #1861837. Workaround as proposed does also not work. Can I provide any more information or does anybody have another idea? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-5.4 in Ubuntu. https://bugs.launchpad.net/bugs/1861938 Title: laptop locks up every time I try to put it to sleep (suspend) Status in linux-signed-5.4 package in Ubuntu: Confirmed Bug description: My ThinkPad X1 Carbon 7th Gen running 20.04 hangs every time I put it to sleep. It doesn't finish going to sleep, i.e., the LEDs stay on, and all I can do is hard power-cycle it by holding down the power button. /var/log/syslog extract showing that after "PM: suspend entry (deep)" the next thing that happens is the system rebooting after I power- cycled it. Feb 4 18:20:10 jik-d42-x1 systemd[1]: Starting Suspend... Feb 4 18:20:10 jik-d42-x1 systemd-sleep[4511]: /usr/lib/systemd/system-sleep/displaylink.sh: line 7: /tmp/PmMessagesPort_out: No such file or directory Feb 4 18:20:10 jik-d42-x1 systemd-sleep[4509]: Suspending system... Feb 4 18:20:10 jik-d42-x1 kernel: [ 54.970789] PM: suspend entry (deep) Feb 4 18:21:01 jik-d42-x1 systemd-modules-load[678]: Inserted module 'lp' Feb 4 18:21:01 jik-d42-x1 kernel: [ 0.000000] microcode: microcode updated early to revision 0xca, date = 2019-10-03 Feb 4 18:21:01 jik-d42-x1 kernel: [ 0.000000] Linux version 5.4.0-13-generic (buildd@lgw01-amd64-039) (gcc version 9.2.1 20200123 (Ubuntu 9.2.1-25ubuntu1)) #16-Ubuntu SMP Thu Jan 30 17:28:41 UTC 2020 (Ubuntu 5.4.0-13.16-generic 5.4.16) I also have a ThinkPad X1 Carbon 6th Gen running 20.04, and it does not have this problem, as you can see from this log snippet... Feb 4 16:24:32 jik-x1 systemd[1]: Starting Suspend... Feb 4 16:24:32 jik-x1 systemd-sleep[1904652]: /usr/lib/systemd/system-sleep/displaylink.sh: line 7: /tmp/PmMessagesPort_out: No such file or directory Feb 4 16:24:32 jik-x1 systemd-sleep[1904650]: Suspending system... Feb 4 16:24:32 jik-x1 kernel: [267217.248978] PM: suspend entry (deep) Feb 4 17:30:38 jik-x1 kernel: [267217.262691] Filesystems sync: 0.013 seconds Feb 4 17:30:38 jik-x1 kernel: [267217.263841] Freezing user space processes ... (elapsed 0.002 seconds) done. Feb 4 17:30:38 jik-x1 kernel: [267217.266689] OOM killer disabled. Feb 4 17:30:38 jik-x1 kernel: [267217.266689] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. ... etc. ... The 7th Gen laptop was able to go to sleep successfully before I upgraded it to 20.04, so this is a regression. I installed all the current packages from proposed as of a few minutes before filing this bug, and that did not fix the problem. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-13-generic 5.4.0-13.16 ProcVersionSignature: Ubuntu 5.4.0-13.16-generic 5.4.16 Uname: Linux 5.4.0-13-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu16 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Feb 4 18:23:17 2020 InstallationDate: Installed on 2019-09-12 (145 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) SourcePackage: linux-signed-5.4 UpgradeStatus: Upgraded to focal on 2020-02-04 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-5.4/+bug/1861938/+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