suspected memory leak with indicator-keyboard (causing gnome-session-flashback to freeze after startup)

[prusswan]

Description:

The system was previously on 22.04, then upgraded to 23.10 to the current daily 24.04. System will freeze up a few minutes after startup (with no apparent related crashes). After various trial and error, the possible cause is isolated to indicator-keyboard when running gnome-session-flashback (freeze does not happen anymore with flashback interface, after indicator-keyboard package is removed). Not sure why this is not happening with vanilla gdm3. Also, the freeze was first observed after the upgrade to 23.10.

**logs below taken from `sudo journalctl --since "3 hours ago" | grep indicator`**

Feb 29 16:49:03 machine kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=user.slice,mems_allowed=0,global_oom,task_memcg=/user.slice/user-1000.slice/[e-mail]/app.slice/indicator-keyboard.service,task=indicator-keybo,pid=5810,uid=1000
Feb 29 16:49:03 machine kernel: Out of memory: Killed process 5810 (indicator-keybo) total-vm:66620172kB, anon-rss:64296784kB, file-rss:768kB, shmem-rss:0kB, UID:1000 pgtables:129412kB oom_score_adj:200
Feb 29 16:49:03 machine kernel: oom_reaper: reaped process 5810 (indicator-keybo), now anon-rss:688kB, file-rss:768kB, shmem-rss:0kB
Feb 29 16:48:56 machine systemd[5304]: indicator-keyboard.service: A process of this unit has been killed by the OOM killer.
Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Main process exited, code=killed, status=9/KILL
Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Failed with result 'oom-kill'.
Feb 29 16:48:57 machine systemd[5304]: indicator-keyboard.service: Consumed 1min 11.913s CPU time.
Feb 29 16:48:58 machine systemd[5304]: indicator-keyboard.service: Scheduled restart job, restart counter is at 1.
Feb 29 16:48:58 machine systemd[5304]: Started indicator-keyboard.service - Indicator Keyboard Backend.
Feb 29 17:00:40 machine dbus-daemon[1111]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service' requested by ':1.9' (uid=0 pid=1588 comm="apt remove indicator-keyboard" label="unconfined")

[aein (aeinner)]

I am experiencing similar problem with 24.04 after adding ibus-mozc method. Right after login indicator-keyboard starts using 100% of CPU with rapid memory consumption which results in freezing and OOM. Symptomatic fix: removing --use-gtk solves this problem.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.