Plasma is crashing after suspend since last big update

soundofthunder · 4 December 2024 12:37

As do I.
I’ve just been skimming through the thread for a little catch up.

There are two recent Known Issues and Solutions that could be related in some way. They are noted in the Stable Update 2024-10-10 announcement:

System freeze on suspend

A feature in systemd 256 freezing a user session when suspending may freeze the system.

[SOLVED] System freezes after sleep since update / Newbie Corner / Arch Linux Forums

Systemd 256 may break sleep

The issue is most prominent with Nvidia systems but reports exist that it may affect other systems as well.
System freezes for 60 seconds and then wakes back up or hangs after waking up

Since systemd v256, systemd freezes user.slice before sleeping. This process can fail due to kernel bugs, particularly when KVM is in use.[13] [14]

Messages in the logs will contain Failed to freeze unit 'user.slice' before sleep. When such an issue occurs, trying to login (start another session) would fail with pam_systemd(process:session): Failed to create session: Job 9876 for unit 'session-6.scope' failed with 'frozen'.

To temporarily revert back to the old behavior, edit systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, and systemd-suspend-then-hibernate.service with the following drop-in:
[Service]
Environment="SYSTEMD_SLEEP_FREEZE_USER_SESSIONS=false"
– Power management/Suspend and hibernate - ArchWiki

…and…

The workaround for this last one is to set your session to empty on login.

System Settings:

→ Session → Desktop Session → Session Restore
→ On login, launch apps that were open:

Start with an empty session

But keep in mind, this could be something else entirely as it’s likely these issues are now fixed with the most recent updates.