Re: kded4 eating CPU

[George Kiagiadakis <kiagiadakis.george@gmail.com>]

On Sat, Apr 2, 2011 at 10:57 PM, Sandro Weiser <sandro.weiser@gmx.de> wrote:
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> I have 2 kded4 processes after starting kde:
>
> user      13274 79.5  0.8 691152 50216 ?        Sl   15:58 278:58
> kdeinit4: kded4 [kdeinit]
>
>
> user      23195  0.1  0.7 618484 43224 ?        Sl   21:30   0:01
> kdeinit4: kded4 [kdeinit]
>
> one is always at nearly 100% cpu. I've to kill it with -9.
>
> Any hints what's wrong and what can I do against this issue?
>
> Sandro

I bet the first one that is eating the cpu was from a previous session
of KDE. You didn't boot directly into that KDE session, but you logged
out and in again, right? If this is the case, I just reproduced it and
I have already found the cause, but it's pretty difficult to find a
solution.

In any case, because I'm not sure if this can be reproduced at will
and I don't want to kill this stuck kded4 instance before I have
collected all the information required to file a bug (and therefore I
cannot retry), if anybody wishes to help me confirm it's the same bug
we are all experiencing, next time this happens please do the
following:

1) Install gdb, libqt4-dbg and kdelibs5-dbg
2) Find the PID of the kded4 instance that eats CPU (for example, in
the above output it's 13274)
3) Run "gdb --pid 13274" (where 13274 is the PID you found)
4) In the gdb command line run "thread apply all bt" and send me the output.

Thanks,
George