Bug 509402

SUMMARY
When mounting a cifs share from fstab, plasma will consistently lock up (or "black screen? widgets load, but do not update, I can open terminal via ctrl+alt+t, but panels, etc are frozen and not loading). I've habitually started running `systemctl restart --user plasma-plasmashell.service` once the freezes start, which will continue to hang until something seems to timeout, and will allow plasma to restart normally. No variation of options for delaying (_netdev, x-systemd.automount, x-systemd.after=network-online.target) seem to affect this outside of disabling (noauto) or just commenting the entry out.

When using x-systemd.automount, I can confirm there are logs that kded6 is the requesting process for the mount.

STEPS TO REPRODUCE
1. Add cifs entry to fstab (example omitting creds: //192.168.1.101/share /mnt/share cifs x-systemd.automount,noauto,_netdev,nofail,credentials=/credsfile,uid=username,file_mode=0775 0 0)
2. Confirm mount works with mount -a
3. Reboot

OBSERVED RESULT
Plasma hangs on login for upwards of a minute on a "black desktop"

EXPECTED RESULT
Plasma logs in as normal

SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION