Kubuntu 24.04 - SDDM fails to start Plasma session
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
sddm (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
After upgrade to Kubuntu 24.04 SDDM fails to start Plasma Wayland session:
1. I enter the correct credentials
2. The screen goes black for a few seconds
3. The SDDM greeter appears again, asking for login credentials.
However, I can start plasma session manually by running /usr/bin/
Attaching the output of `journalctl -f` during an attempt to start Plasma from SDDM.
The following lines seem to be connected to the problem:
kwi 20 13:17:29 k-laptop sddm[1197]: Authentication for user "kyrboh" successful
kwi 20 13:17:29 k-laptop sddm-helper[1971]: pam_kwallet5(
kwi 20 13:17:29 k-laptop sddm-helper[1971]: pam_unix(
kwi 20 13:17:29 k-laptop sddm-greeter[1901]: Message received from daemon: LoginSucceeded
kwi 20 13:17:29 k-laptop systemd-
kwi 20 13:17:29 k-laptop systemd[1]: Started session-11.scope - Session 11 of User kyrboh.
kwi 20 13:17:29 k-laptop sddm-helper[1971]: pam_kwallet5(
kwi 20 13:17:29 k-laptop sddm-helper[1974]: pam_kwallet5: final socket path: /run/user/
kwi 20 13:17:29 k-laptop sddm-helper[1971]: pam_env(
kwi 20 13:17:29 k-laptop sddm-helper[1971]: [PAM] openSession: Critical error - immediate abort
kwi 20 13:17:29 k-laptop sddm[1197]: Authentication error: SDDM::Auth:
kwi 20 13:17:29 k-laptop sddm[1197]: Session started false
kwi 20 13:17:29 k-laptop sddm-helper[1971]: [PAM] Asked to close the session but it wasn't previously open
kwi 20 13:17:29 k-laptop sddm-helper[1971]: [PAM] Ended.
kwi 20 13:17:29 k-laptop sddm[1197]: Auth: sddm-helper exited with 2
kwi 20 13:17:29 k-laptop sddm[1197]: Greeter stopping...
kwi 20 13:17:29 k-laptop sddm-helper[1900]: Signal received: SIGTERM
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: sddm 0.20.0-2ubuntu4
ProcVersionSign
Uname: Linux 6.8.0-28-generic x86_64
NonfreeKernelMo
ApportVersion: 2.28.1-0ubuntu2
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: KDE
Date: Sat Apr 20 13:18:39 2024
InstallationDate: Installed on 2023-11-04 (168 days ago)
InstallationMedia: Kubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.1)
SourcePackage: sddm
UpgradeStatus: Upgraded to noble on 2024-04-20 (0 days ago)
It seems this got solved for me by editing the ~/.pam_environment file. Previously I had this:
export SAL_USE_ VCLPLUGIN= gtk3
Perhaps something for libreoffice... Commenting out that line allows SDDM to start plasma.