Hello,
Requirements:
I have Searched the forum for my issue and found nothing related or helpful
I have checked the Resources category (Resources Index)
I have reviewed the Wiki for relevant information
I have read the the Release Notes and Errata
OpenMandriva Lx version:
OpenMandriva Lx release 25.12 (ROME) Rolling for x86_64
Desktop environment (KDE, LXQT…):
KDE Plasma with SDDM
Description of the issue (screenshots if relevant):
After startup usually within 5-10 minutes the X server dies and the session restarts.
Relevant informations (hardware involved, software version, logs or output…):
output of journalctl -b -u sddm
Dec 24 16:04:20 koalamatic-1800 systemd[1]: Started sddm.service - Simple Desktop Display Manager.
Dec 24 16:04:20 koalamatic-1800 sddm-helper[991]: pam_unix(sddm-greeter:session): session opened for user sddm(uid=106) by (uid=0)
Dec 24 16:04:21 koalamatic-1800 sddm-helper[991]: Starting X11 session: "/usr/bin/X -verbose 3 -background none -seat seat0 -noreset -keeptty -novtswitch" "/usr/bin/sddm-greeter-qt6 --socket /tmp/sddm--lhoMqS --theme /usr/share/sddm/themes/breeze"
Dec 24 16:05:58 koalamatic-1800 sddm-helper[1159]: pam_kwallet5(sddm:auth): pam_kwallet5: pam_sm_authenticate
Dec 24 16:05:58 koalamatic-1800 sddm-helper[1159]: pam_kwallet5(sddm:setcred): pam_kwallet5: pam_sm_setcred
Dec 24 16:05:58 koalamatic-1800 sddm-helper[1159]: pam_kwallet5(sddm:session): pam_kwallet5: pam_sm_open_session
Dec 24 16:05:58 koalamatic-1800 sddm-helper[1165]: pam_kwallet5: final socket path: /tmp/kwallet5_koala.socket
Dec 24 16:05:58 koalamatic-1800 sddm-helper[1159]: pam_unix(sddm:session): session opened for user koala(uid=1001) by (uid=0)
Dec 24 16:05:58 koalamatic-1800 sddm[962]: Authentication information: SDDM::Auth::INFO_UNKNOWN "Last failed login: Fri Dec 5 13:28:18 CET 2025"
Dec 24 16:05:58 koalamatic-1800 sddm[962]: Authentication information: SDDM::Auth::INFO_UNKNOWN "There was 1 failed login attempt since the last successful login."
Dec 24 16:05:58 koalamatic-1800 sddm-helper[1159]: Starting X11 session: "/usr/bin/X -verbose 3 -background none -seat seat0 -noreset -keeptty -novtswitch" "/usr/share/X11/xdm/Xsession \"/usr/bin/startplasma-x11\""
Dec 24 16:06:20 koalamatic-1800 ksecretd[1166]: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: Connection already associated with an application ID")
Dec 24 16:07:18 koalamatic-1800 ksecretd[1166]: The X11 connection broke (error 1). Did the X11 server die?
Dec 24 16:07:18 koalamatic-1800 sddm[962]: Auth: sddm-helper exited with 2
Dec 24 16:07:18 koalamatic-1800 sddm-helper[2117]: pam_unix(sddm-greeter:session): session opened for user sddm(uid=106) by (uid=0)
Dec 24 16:07:18 koalamatic-1800 sddm-helper[2117]: Starting X11 session: "/usr/bin/X -verbose 3 -background none -seat seat0 -noreset -keeptty -novtswitch" "/usr/bin/sddm-greeter-qt6 --socket /tmp/sddm--eMZtzy --theme /usr/share/sddm/themes/breeze"
Dec 24 16:07:23 koalamatic-1800 sddm-helper[2286]: pam_kwallet5(sddm:auth): pam_kwallet5: pam_sm_authenticate
Dec 24 16:07:23 koalamatic-1800 sddm-helper[2286]: pam_kwallet5(sddm:setcred): pam_kwallet5: pam_sm_setcred
Dec 24 16:07:23 koalamatic-1800 sddm-helper[2286]: pam_kwallet5(sddm:session): pam_kwallet5: pam_sm_open_session
Dec 24 16:07:23 koalamatic-1800 sddm-helper[2292]: pam_kwallet5: final socket path: /tmp/kwallet5_koala.socket
Dec 24 16:07:23 koalamatic-1800 sddm-helper[2286]: pam_unix(sddm:session): session opened for user koala(uid=1001) by (uid=0)
Dec 24 16:07:23 koalamatic-1800 sddm[962]: Authentication information: SDDM::Auth::INFO_UNKNOWN "Last failed login: Fri Dec 5 13:28:18 CET 2025"
Dec 24 16:07:23 koalamatic-1800 sddm[962]: Authentication information: SDDM::Auth::INFO_UNKNOWN "There was 1 failed login attempt since the last successful login."
Dec 24 16:07:23 koalamatic-1800 sddm-helper[2286]: Starting X11 session: "/usr/bin/X -verbose 3 -background none -seat seat0 -noreset -keeptty -novtswitch" "/usr/share/X11/xdm/Xsession \"/usr/bin/startplasma-x11\""
Dec 24 16:07:25 koalamatic-1800 ksecretd[2293]: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: Connection already associated with an application ID")
The issue started after the distro-sync that updated to dnf5 (1-2 month ago?) since then i’ve been using my arch laptop and didnt bother to submit an issue to the forum.
Initially i thought it was an SDDM problem, so i swapped it for Ly. Problem was fixed, but so many other things (sound, volume, keyboard, language) broke from plasma that i switched back to SDDM.
After inspecting the journal I think it’s a problem with XLibre, but i don’t know how to inspect the issue further.
Usually after 1 or 2 session restarts the problem doesnt re-occur if I don’t restart the machine.