I'm experiencing this 100% CPU problem using Intrepid (fast-user-switch-
applet 2.24.0-0ubuntu6). The problem happens when I switch from my
user to some other user, but not every time or to any pattern I can so
far work out. I typically keep my session logged in for days while
other users of the machine log in and out more often. This machine has
3-4 active users, all local no NIS/LDAP being used.
While the process is using 100% CPU, strace shows it is constantly
trying and failing to read a file, over and over. Here's a small
portion of the output. Next time it happens I'll connect gdb and see if
I can get any more information.
read(21, 0xbf972089, 1) = -1 EAGAIN (Resource temporarily
unavailable)
read(3, 0x8752894, 4096) = -1 EAGAIN (Resource temporarily
unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=8,
events=POLLIN|POLLPRI}, {fd=11, events=POLLIN|POLLPRI}, {fd=12,
events=POLLIN|POLLPRI}, {fd=13, events=POLLIN|POLLPRI}, {fd=15,
events=POLLIN|POLLPRI}, {fd=14, events=POLLIN|POLLPRI}, {fd=16,
events=POLLIN|POLLPRI}, {fd=17, events=POLLIN|POLLPRI}, {fd=19, events=POLLIN},
{fd=18, events=POLLIN|POLLPRI}, {fd=10, events=POLLIN}, {fd=20,
events=POLLIN}], 14, 0) = 0
--
fast user switch applet hangs on login making desktop unusuable
https://bugs.launchpad.net/bugs/291505
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