Pidgin using up 100% of CPU right after startup

[Dima Ryazanov]

Pidgin started up when I logged in, and started using 100% of CPU. Unlike in the other bug reports, I have not sent or received any messages and haven't touched pidgin. It's not frozen, either - just laggy.

Here's the backtrace from gdb:

#0 0x00007f7fe4b04c5d in write () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f7fe53d276f in g_wakeup_signal (wakeup=0x7f7fe83d2340) at /build/buildd/glib2.0-2.36.0/./glib/gwakeup.c:238
#2 0x00007f7fe5390a19 in g_main_context_remove_poll_unlocked (context=<optimized out>, fd=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:4184
#3 0x00007f7fe5390a74 in block_source (source=source@entry=0x7f7fe943a420) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:2943
#4 0x00007f7fe5393fb8 in g_main_dispatch (context=0x7f7fe83d9320) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3031
#5 g_main_context_dispatch (context=context@entry=0x7f7fe83d9320) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3630
#6 0x00007f7fe5394248 in g_main_context_iterate (context=0x7f7fe83d9320, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3701
#7 0x00007f7fe53946ba in g_main_loop_run (loop=0x7f7fe929a520) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3895
#8 0x00007f7fe660cfe7 in IA__gtk_main () at /build/buildd/gtk+2.0-2.24.17/gtk/gtkmain.c:1271
#9 0x00007f7fe80083bc in main (argc=3, argv=0x7fffe1e455f8) at /build/buildd/pidgin-2.10.7/./pidgin/gtkmain.c:881

Output from strace:

write(5, "\1\0\0\0\0\0\0\0", 8) = 8
recvfrom(6, 0x7f7fe83f06e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}, {fd=21, events=POLLIN}, {fd=27, events=POLLIN}, {fd=25, events=POLLIN}, {fd=15, events=POLLIN}, {fd=9, events=POLLIN}, {fd=26, events=POLLIN}, {fd=17, events=POLLIN}, {fd=27, events=POLLOUT}], 13, 0) = 2 ([{fd=5, revents=POLLIN}, {fd=27, revents=POLLOUT}])
read(5, "\2\0\0\0\0\0\0\0", 16) = 8
write(5, "\1\0\0\0\0\0\0\0", 8) = 8
recvfrom(27, 0x7f7fe9457050, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
write(5, "\1\0\0\0\0\0\0\0", 8) = 8
recvfrom(6, 0x7f7fe83f06e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}, {fd=21, events=POLLIN}, {fd=27, events=POLLIN}, {fd=25, events=POLLIN}, {fd=15, events=POLLIN}, {fd=9, events=POLLIN}, {fd=26, events=POLLIN}, {fd=17, events=POLLIN}, {fd=27, events=POLLOUT}], 13, 0) = 2 ([{fd=5, revents=POLLIN}, {fd=27, revents=POLLOUT}])
read(5, "\2\0\0\0\0\0\0\0", 16) = 8
write(5, "\1\0\0\0\0\0\0\0", 8) = 8

According to /proc, fd=5 is "anon_inode:[eventfd]".

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: pidgin 1:2.10.7-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.8.0-29.42-generic 3.8.13.5
Uname: Linux 3.8.0-29-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.4
Architecture: amd64
Date: Fri Sep 13 13:23:52 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-04-05 (161 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
MarkForUpload: True
SourcePackage: pidgin
UpgradeStatus: Upgraded to raring on 2013-04-12 (153 days ago)

[Dima Ryazanov (dima-gmail)]

Happened again after I disconnected and reconnected to wifi a bunch of times, while pidgin was already running.