| Summary: | SDDM Mixes seats in multi-seat setup (Failed to create session: TTY tty1 is virtual console but seat seat1 is not seat0) | ||
|---|---|---|---|
| Product: | [I don't know] kde | Reporter: | dimanne <causal.consistency> |
| Component: | general | Assignee: | Unassigned bugs mailing-list <unassigned-bugs> |
| Status: | RESOLVED UPSTREAM | ||
| Severity: | major | CC: | nate |
| Priority: | NOR | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Kubuntu | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
Is this not an SDDM issue? Sorry, yes, it is SDDM issue. I guess it does not have anything to do with KDE... Indeed... at least not yet! Regardless, please report it at https://github.com/sddm/sddm/issues. Thanks! It has been reported 4 times so far: * Jul 14: https://github.com/sddm/sddm/issues/1762 (SDDM 0.20.0 fails to create session in multi-seat configuration) * Jul 23: https://github.com/sddm/sddm/issues/1769 (SDDM doesn't seem to handle starting Wayland sessions on seats without VTs well) * Aug 3: https://github.com/sddm/sddm/issues/1778 (Wayland multiseat) * today by me: https://github.com/sddm/sddm/issues/1786 |
# SUMMARY It looks like login session from a second seat does get initialised properly. ### This is what I observe: Only one session is reported by loginctl: Only one session is detected ``` loginctl list-sessions SESSION UID USER SEAT TTY 4 1000 dimanne seat0 tty2 1 sessions listed. ``` Directory `/run/user/1001` is not created. `DBUS_SESSION_BUS_ADDRESS` of the second user is empty. systemctl --user list-units prints: ``` Failed to connect to bus: No medium found ``` Finally, `loginctl session-status` says: ``` Could not get properties: Unknown object 'org/freedesktop/login1/session/auto' ``` ### Why it happens I think this happens because sddm failed to properly initialise login session. This is how sddm logs look for "good" login: ``` Aug 20 09:52:17 impedance sddm[8212]: Authentication for user "dimanne" successful Aug 20 09:52:17 impedance sddm-greeter[8590]: Message received from daemon: LoginSucceeded Aug 20 09:52:17 impedance sddm-helper[9033]: pam_kwallet5(sddm:setcred): pam_kwallet5: pam_sm_setcred Aug 20 09:52:17 impedance sddm-helper[9033]: pam_limits(sddm:session): Could not set limit for 'nofile' to soft=16777216, hard=16777216: Operation not permitted; uid=0,euid=0 Aug 20 09:52:17 impedance sddm-helper[9033]: pam_unix(sddm:session): session opened for user dimanne(uid=1000) by (uid=0) Aug 20 09:52:17 impedance sddm-helper[8362]: [PAM] Closing session Aug 20 09:52:17 impedance sddm-helper[8362]: pam_unix(sddm-greeter:session): session closed for user sddm Aug 20 09:52:17 impedance sddm-helper[8362]: [PAM] Ended. Aug 20 09:52:17 impedance sddm[8212]: Auth: sddm-helper exited successfully Aug 20 09:52:17 impedance sddm[8212]: Greeter stopped. SDDM::Auth::HELPER_SUCCESS Aug 20 09:52:17 impedance sddm-helper[9033]: pam_kwallet5(sddm:session): pam_kwallet5: pam_sm_open_session Aug 20 09:52:17 impedance sddm-helper[9078]: pam_kwallet5: final socket path: /run/user/1000/kwallet5.socket Aug 20 09:52:17 impedance sddm-helper[9033]: pam_env(sddm:session): deprecated reading of user environment enabled Aug 20 09:52:17 impedance sddm-helper[9033]: Writing cookie to "/tmp/xauth_vDhCDz" Aug 20 09:52:17 impedance sddm-helper[9033]: Starting X11 session: "" "/etc/sddm/Xsession \"/usr/bin/startplasma-x11\"" Aug 20 09:52:17 impedance sddm[8212]: Session started true Aug 20 12:27:05 impedance sddm-greeter[8534]: Reading from "/usr/share/xsessions/plasma.desktop" ``` And this is how they look for 2nd seat ``` Aug 20 12:27:05 impedance sddm[8212]: Authentication for user "yulia" successful Aug 20 12:27:05 impedance sddm-greeter[8534]: Message received from daemon: LoginSucceeded Aug 20 12:27:05 impedance sddm-helper[56829]: pam_kwallet5(sddm:setcred): pam_kwallet5: pam_sm_setcred Aug 20 12:27:05 impedance sddm-helper[56829]: pam_limits(sddm:session): Could not set limit for 'nofile' to soft=16777216, hard=16777216: Operation not permitted; uid=0,euid=0 Aug 20 12:27:05 impedance sddm-helper[56829]: pam_unix(sddm:session): session opened for user yulia(uid=1001) by (uid=0) Aug 20 12:27:05 impedance sddm-helper[56829]: pam_systemd(sddm:session): Failed to create session: TTY tty1 is virtual console but seat seat1 is not seat0 Aug 20 12:27:05 impedance sddm-helper[56829]: pam_kwallet5(sddm:session): pam_kwallet5: pam_sm_open_session Aug 20 12:27:05 impedance sddm-helper[56832]: pam_kwallet5: final socket path: /tmp/kwallet5_yulia.socket Aug 20 12:27:05 impedance sddm-helper[56829]: pam_env(sddm:session): deprecated reading of user environment enabled Aug 20 12:27:05 impedance sddm-helper[56829]: Writing cookie to "/tmp/xauth_MzDsqA" Aug 20 12:27:05 impedance sddm-helper[56829]: Starting X11 session: "" "/etc/sddm/Xsession \"/usr/bin/startplasma-x11\"" Aug 20 12:27:05 impedance sddm[8212]: Session started true Aug 20 12:27:05 impedance sddm-helper[8399]: [PAM] Closing session Aug 20 12:27:05 impedance sddm-helper[8399]: pam_unix(sddm-greeter:session): session closed for user sddm Aug 20 12:27:05 impedance sddm-helper[8399]: [PAM] Ended. Aug 20 12:27:05 impedance sddm[8212]: Auth: sddm-helper exited successfully Aug 20 12:27:05 impedance sddm[8212]: Greeter stopped. SDDM::Auth::HELPER_SUCCESS ``` STEPS TO REPRODUCE 1. Create two seats 2. Login 1st seat. 3. Login 2nd seat. OBSERVED RESULT See above in the section "What I observe". SOFTWARE/OS VERSIONS Operating System: Kubuntu 23.10 KDE Plasma Version: 5.27.7 KDE Frameworks Version: 5.109.0 Qt Version: 5.15.10 Kernel Version: 6.3.0-7-generic (64-bit) Graphics Platform: X11