Public bug reported: Not sure if this is a gdm3 or nvidia-graphics issue.
Ubuntu 20.04, gdm3 Nvidia GTX 1650, Nvidia proprietary driver After a fresh boot I can switch users from my X session with no problem in the first, say, 1 hour. If I use the system for a day switching user takes me to a blank screen with only the mouse cursor for a few minutes until the logon screen does appear. ssh'ing into my box while this happens shows Xorg at 100% cpu utilisation and the following being appended to /var/log/Xorg.0.log (and equiv in /var/log/syslog) at crazy speed: [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.637] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.637] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.637] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.637] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.637] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.637] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.637] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.637] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.637] (--) NVIDIA(GPU-0): [169729.638] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.638] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.638] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.638] (--) NVIDIA(GPU-0): [169729.638] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.638] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.638] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock If I disconnect my monitor by pulling out the hdmi cable from the nvidia card and reconnect it the logon screen comes up immediately and all is good. Otherwise I have to wait a few minutes and the logon screen will eventually come up. The message in /var/log/Xorg.0.log I get after unplugging is: [169729.653] (--) NVIDIA(GPU-0): DFP-3: disconnected [169729.653] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS [169729.653] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock [169729.653] (--) NVIDIA(GPU-0): [169729.654] (II) systemd-logind: got resume for 13:69 [169729.655] (II) event5 - Logitech G102 Prodigy Gaming Mouse Consumer Control: is tagged by udev as: Keyboard [169729.655] (II) event5 - Logitech G102 Prodigy Gaming Mouse Consumer Control: device is a keyboard [169729.655] (II) systemd-logind: got resume for 13:70 [169729.656] (II) event6 - Logitech G102 Prodigy Gaming Mouse System Control: is tagged by udev as: Keyboard [169729.656] (II) event6 - Logitech G102 Prodigy Gaming Mouse System Control: device is a keyboard [169729.883] (--) NVIDIA(GPU-0): DFP-0: disconnected [169729.883] (--) NVIDIA(GPU-0): DFP-0: Internal DisplayPort [169729.883] (--) NVIDIA(GPU-0): DFP-0: 2660.0 MHz maximum pixel clock [169729.883] (--) NVIDIA(GPU-0): [169729.883] (--) NVIDIA(GPU-0): DFP-1: disconnected [169729.883] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS [169729.884] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock [169729.884] (--) NVIDIA(GPU-0): [169729.884] (--) NVIDIA(GPU-0): DFP-2: disconnected [169729.884] (--) NVIDIA(GPU-0): DFP-2: Internal TMDS [169729.884] (--) NVIDIA(GPU-0): DFP-2: 165.0 MHz maximum pixel clock [169729.884] (--) NVIDIA(GPU-0): [169729.986] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169729.986] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169729.986] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169729.986] (--) NVIDIA(GPU-0): [169730.400] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169730.400] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169730.400] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169730.400] (--) NVIDIA(GPU-0): [169730.430] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169730.430] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169730.430] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169730.430] (--) NVIDIA(GPU-0): [169734.634] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169734.634] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169734.634] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169734.634] (--) NVIDIA(GPU-0): [169734.696] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169734.696] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169734.696] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169734.696] (--) NVIDIA(GPU-0): [169735.228] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169735.228] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169735.228] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169735.228] (--) NVIDIA(GPU-0): [169735.258] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169735.258] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169735.258] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169735.258] (--) NVIDIA(GPU-0): [169769.503] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169769.503] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169769.503] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169769.503] (--) NVIDIA(GPU-0): [169769.563] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169769.563] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169769.563] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169769.563] (--) NVIDIA(GPU-0): [169770.007] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169770.007] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169770.007] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169770.007] (--) NVIDIA(GPU-0): [169770.039] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169770.039] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169770.039] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169770.039] (--) NVIDIA(GPU-0): [169787.703] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169787.703] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169787.703] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169787.703] (--) NVIDIA(GPU-0): [169787.762] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169787.762] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169787.762] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169787.762] (--) NVIDIA(GPU-0): [169788.206] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169788.206] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169788.206] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169788.206] (--) NVIDIA(GPU-0): [169788.235] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169788.235] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169788.235] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169788.235] (--) NVIDIA(GPU-0): [169805.753] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169805.753] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169805.753] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169805.753] (--) NVIDIA(GPU-0): [169805.814] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169805.814] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169805.814] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169805.814] (--) NVIDIA(GPU-0): [169806.348] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169806.348] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169806.348] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169806.348] (--) NVIDIA(GPU-0): [169806.378] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): connected [169806.378] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): Internal TMDS [169806.378] (--) NVIDIA(GPU-0): DELL U2518D (DFP-3): 600.0 MHz maximum pixel clock [169806.378] (--) NVIDIA(GPU-0): [169813.565] (**) Option "fd" "44" [169813.565] (II) event1 - Power Button: device removed [169813.565] (**) Option "fd" "25" [169813.565] (II) event0 - Power Button: device removed [169813.566] (**) Option "fd" "47" [169813.566] (II) event3 - Logitech G102 Prodigy Gaming Mouse: device removed [169813.566] (**) Option "fd" "45" [169813.566] (II) event4 - Logitech G102 Prodigy Gaming Mouse Keyboard: device removed [169813.566] (**) Option "fd" "56" [169813.566] (**) Option "fd" "46" [169813.566] (II) event6 - Logitech G102 Prodigy Gaming Mouse System Control: device removed [169813.567] (**) Option "fd" "26" [169813.567] (II) event2 - AT Translated Set 2 keyboard: device removed [169813.567] (**) Option "fd" "56" [169813.567] (II) event5 - Logitech G102 Prodigy Gaming Mouse Consumer Control: device removed [169813.687] (II) systemd-logind: got pause for 13:66 [169813.687] (II) systemd-logind: got pause for 13:67 [169813.687] (II) systemd-logind: got pause for 13:64 [169813.687] (II) systemd-logind: got pause for 13:65 [169813.687] (II) systemd-logind: got pause for 13:68 [169813.687] (II) systemd-logind: got pause for 13:69 [169813.687] (II) systemd-logind: got pause for 13:70 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xserver-xorg-video-nvidia-440 440.82+really.440.64-0ubuntu6 ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30 Uname: Linux 5.4.0-28-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun May 3 11:35:39 2020 InstallationDate: Installed on 2020-04-24 (8 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: nvidia-graphics-drivers-440 UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: nvidia-graphics-drivers-440 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1876565 Title: logon screen take minutes to appear after logging off or switching user once system has been running for a few days To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-440/+bug/1876565/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs