Bug#1016079: 10 minutes after boot ibus-daemonspikes to 100% CPU usage and stays there forever

[Bernhard Übelacker <bernhardu@mailbox.org>]

Hello David,

> Not really sure how to troubleshoot a 100% CPU usage ibus-daemon problem.

This issue might be very hard for the maintainer to diagnose
if he cannot reproduce it.

As a starting point you probably could collect the output of
following command after the spike was visible for a few minutes.
This should give one line with a few minutes in the "TIME" column.

    ps -eLf | grep -i -E "PPID|ibus-daemon"

And additionally after installing gdb and giving this command, which
attaches a debugger to the daemon and printing a backtrace for each thread.

    gdb -q --pid $(pidof ibus-daemon) -ex 'set width 0' -ex 'set pagination off' -ex 'thread apply all bt' -ex 'detach' -ex 'quit'

Those two outputs might point to the thread inside ibus-daemon and
in which function it is currently executing.

Kind regards,
Bernhard