I've just dist-upgraded from dapper to edgy. If I log in and run gnome-theme-manager, its window appears, populated with the list of installed themes -- however, it immediately pegs the CPU to 100% and stops updating the window.
gdb backtrace:
0xb78fad67 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
(gdb) bt
#0 0xb78fad67 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#1 0xb78fb4a5 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#2 0xb78fbb89 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#3 0xb7c5d574 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#4 0x08052384 in main ()
(gdb) thr
[Current thread is 1 (Thread -1225488720 (LWP 5618))]
strace shows it looping in:
5678 read(5, "", 1024) = 0
5678 ioctl(3, FIONREAD, [0]) = 0
5678 gettimeofday({1161945967, 531757}, NULL) = 0
5678 poll([{fd=6, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN|PO
LLPRI}, {fd=13, events=POLLIN|POLLPRI}, {fd=14, events=POLLIN|POLLPRI}, {fd=15, ev
ents=POLLIN|POLLPRI}, {fd=16, events=POLLIN}, {fd=17, events=POLLIN}, {fd=12, even
ts=POLLIN|POLLPRI}, {fd=5, events=POLLIN, revents=POLLHUP}], 10, 0) = 1
5678 read(5, "", 1024) = 0
5678 ioctl(3, FIONREAD, [0]) = 0
5678 gettimeofday({1161945967, 531853}, NULL) = 0
5678 poll([{fd=6, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN|PO
LLPRI}, {fd=13, events=POLLIN|POLLPRI}, {fd=14, events=POLLIN|POLLPRI}, {fd=15, ev
ents=POLLIN|POLLPRI}, {fd=16, events=POLLIN}, {fd=17, events=POLLIN}, {fd=12, even
ts=POLLIN|POLLPRI}, {fd=5, events=POLLIN, revents=POLLHUP}], 10, 0) = 1
5678 read(5, "", 1024) = 0
5678 ioctl(3, FIONREAD, [0]) = 0
....[etc]
Looking at the strace, it appears the loop is ignoring an EOF from a subprocess it had forked earlier. That subprocess has died with a SEGV. I'll attach the trace.
here's the strace. search for SEGV around line 15010.