** Bug watch added: LightDM GTK+ Greeter Bugs #98 https://github.com/Xubuntu/lightdm-gtk-greeter/issues/98
** Also affects: lightdm-gtk-greeter via https://github.com/Xubuntu/lightdm-gtk-greeter/issues/98 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of LightDM Gtk+ Greeter Development Team, which is subscribed to lightdm-gtk- greeter in Ubuntu. https://bugs.launchpad.net/bugs/1865323 Title: Switch User+DPMS then click Unlock causes a delay with black screen Status in LightDM GTK Greeter: New Status in lightdm-gtk-greeter package in Ubuntu: Confirmed Bug description: ed@userver:~$ lsb_release -rd Description: Ubuntu Focal Fossa (development branch) Release: 20.04 ed@userver:~$ apt-cache policy pkgname lightdm-gtk-greeter lightdm-gtk-greeter: Installed: 2.0.6-0ubuntu1 Candidate: 2.0.6-0ubuntu1 Version table: *** 2.0.6-0ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 Packages 100 /var/lib/dpkg/status N: Unable to locate package pkgname I'm not sure if the issue is in the LightDM greeter, but it only happens after I use the greeter. I expect my desktop to get displayed soon after I click "Unlock" on the greeter. What happens is that there is a delay with black screen of at least 2 seconds (often 10 minutes). Details: When I "Switch User" and then click unlock button, I get a black screen with no mouse cursor for 2 seconds, and then black screen with mouse cursor for approx 0.65 seconds for every minute my PC was in DPMS (after 495 minutes in DPMS the black screen is up for a very long 321 seconds). If I'm on greeter screen and keep moving mouse to avoid DPMS, then I only have the 2 second delay. This only happens with NVidia drivers (nouveau drivers don't have any delay at all). I tested on fresh installs of both Ubuntu 19.10 with default gdm and UbuntuStudio 19.10 with LightDM and now UbuntuStudio 20.04 nightly build. If I prevent DPMS by moving my mouse every few minutes, then I only have the 2 second delay. I am not able to reproduce this issue on UbuntuStudio 18.04. Methods that cause delay: - Click "Switch User" on the Whisker menu. - Click "Switch User" on the "Action Buttons" on panel 0. - dm-tool switch-to-greeter (displays greeter) - dm-tool lock (starts DPMS, then greeter) Methods that DO NOT cause delay: - Click "Lock" on the Whisker menu. - Click "Lock" on the "Action Buttons" on panel 0. - xdotool key Ctrl+alt+l (runs screensaver, only delay if click "Switch User") - xflock4 (runs screensaver, only delay if click "Switch User") - xset dpms force off (runs screensaver, only delay if click "Switch User") Another interesting symptom is that the first 2 second black screen does have the mouse pointer in 19.10, but not in 20.04. Also, If I Lock instead of Switch User, then my desktop comes up immediately. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: lightdm-gtk-greeter 2.0.6-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-14.17-lowlatency 5.4.18 Uname: Linux 5.4.0-14-lowlatency x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu18 Architecture: amd64 Date: Sun Mar 1 00:56:12 2020 InstallationDate: Installed on 2020-02-29 (0 days ago) InstallationMedia: Ubuntu-Studio 20.04 LTS "Focal Fossa" - Alpha amd64 (20200227) ProcEnviron: LANGUAGE=en_US TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: lightdm-gtk-greeter UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1865323/+subscriptions -- Mailing list: https://launchpad.net/~lightdm-gtk-greeter-team Post to : [email protected] Unsubscribe : https://launchpad.net/~lightdm-gtk-greeter-team More help : https://help.launchpad.net/ListHelp
