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List:       kde-bugs-dist
Subject:    [Bug 278897] Amarok uses ~40% of CPU until main window is maximized
From:       Attilio Scotolati <nexor () teletu ! it>
Date:       2011-11-22 14:17:50
Message-ID: E1RSrAU-0002Oy-TE () bugs ! kde ! org
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https://bugs.kde.org/show_bug.cgi?id=278897


Attilio Scotolati <nexor@teletu.it> changed:

           What    |Removed                     |Added
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                 CC|                            |nexor@teletu.it




--- Comment #31 from Attilio Scotolati <nexor teletu it>  2011-11-22 14:17:49 ---
I'm also experiencing this bug on OpenSuse 12.1, with amarok
2.4.60git.1321705210-71.1 from Playground.
Furthermore, if I try to start music playback while in minimized, high-cpu
state, playback stops after one-two seconds, then after another 10 seconds or
so amarok crashes, and DrKonqui doesn't show up. This is a backtrace with gdb:

#0  0x00007ffff4865d95 in raise () from /lib64/libc.so.6
#1  0x00007ffff48672ab in abort () from /lib64/libc.so.6
#2  0x00007ffff4e94f2d in __gnu_cxx::__verbose_terminate_handler() ()
   from /usr/lib64/libstdc++.so.6
#3  0x00007ffff4e930d6 in ?? () from /usr/lib64/libstdc++.so.6
#4  0x00007ffff4e93103 in std::terminate() () from /usr/lib64/libstdc++.so.6
#5  0x00007ffff4e93246 in __cxa_rethrow () from /usr/lib64/libstdc++.so.6
#6  0x00007ffff5ee0d56 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
    () from /usr/lib64/libQtCore.so.4
#7  0x00007ffff5ee4de7 in QCoreApplication::exec() ()
   from /usr/lib64/libQtCore.so.4
#8  0x000000000040987e in main (argc=4, argv=0x7fffffffdb88)
    at /usr/src/debug/amarok-2.4.60git.1321705210/src/main.cpp:310

A more complete output of this gdb session is at http://paste.kde.org/149486/
Those X errors are spawning endlessly, until i open the main window. Then, CPU
usage goes back to normal, and i can start playback with no other issues,
that's why I believe this behavior is related to this bug.

IIRC, with an older glibc this wasn't happening, OS uses 2.14.1, but I fear
breaking my system if I revert that.

I have an Acer 4810TG, and I'm using the intel 4500MHD GPU, Mesa 7.11, kernel
3.1.0, desktop effects on (disabling them gave me the same crash, but later).

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