Comment 27 for bug 1890791

I am also having this problem with Kubuntu 18.04, see the above screencast. This seems to also affects sync programs, (e.g. Seafile), which are supposed to watch certain directories for changes and upload to the server any files that have been changed, however I need to manually tell it to rescan the directories.

I get a "No space left on device" error when running Dolphin:

$ dolphin
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "stash"
inotify_add_watch("/etc/fstab") failed: "No space left on device"
inotify_add_watch("/home/mike/.local/share/user-places.xbel") failed: "No space left on device"
inotify_add_watch("/home/mike") failed: "No space left on device"
qt.accessibility.core: Cannot create accessible child interface for object: PlacesView(0x557fc372cf20) index: 12
kf5.kio.core: KLocalSocket(0x557fc389e150) Jumbo packet of 132210 bytes
kf5.kio.core: KSambaShare: Could not find smb.conf!

However there is plenty of space left on all drives:

$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 3.4G 0 3.4G 0% /dev
tmpfs 691M 1.7M 690M 1% /run
/dev/mapper/mike--debian-root 42G 4.2G 36G 11% /
/dev/mapper/mike--debian-usr 30G 6.8G 22G 24% /usr
tmpfs 3.4G 101M 3.3G 3% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 3.4G 0 3.4G 0% /sys/fs/cgroup
/dev/sda1 730M 6.1M 724M 1% /boot/efi
/dev/mapper/mike--debian-tmp 42G 49M 40G 1% /tmp
/dev/mapper/mike--debian-home 504G 152G 327G 32% /home
/dev/mapper/mike--debian-var 133G 3.2G 123G 3% /var
tmpfs 691M 16K 691M 1% /run/user/129
tmpfs 691M 20K 691M 1% /run/user/1000