gnome-system-monitor freeze with inspect open files Skype

Thanks for your bug report. Please try to obtain a backtrace http://wiki.ubuntu.com/DebuggingProgramCrash and attach the file to the bug report. This will greatly help us in tracking down your problem.

backtrace generated according procedure https://wiki.ubuntu.com/Backtrace
But because the program does not crash but freeze I think the report will be not much of use.
I hope I am wrong
Good luck & regards

could you get a backtrace during the hang?

How do I do that sir?
During the 'hang' the gdb is not in control anymore. I mean during the 'hang' there is no

(gdb)

prompt to give to backtrace command.
I can type it but the gdb will not respont because it has give control to to application (even during the 'hang')
Wait....

I have now given a ctrl-z during the hang.
now I can give the backtrace command in gdb
I hope it now give the right backtrace log. After ctrl-z the output of gdb is:

Program received signal SIGTSTP, Stopped (user).
[Switching to Thread -1223780656 (LWP 7513)]
0xffffe410 in __kernel_vsyscall ()
(gdb)

now I type the commands to create the log:

(gdb) backtrace

output
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb75b8033 in read () from /lib/tls/i686/cmov/libc.so.6
#2 0xb75594f8 in _IO_file_read () from /lib/tls/i686/cmov/libc.so.6
#3 0xb755a8c0 in _IO_file_underflow () from /lib/tls/i686/cmov/libc.so.6
#4 0xb755afbb in _IO_default_uflow () from /lib/tls/i686/cmov/libc.so.6
#5 0xb755c31d in __uflow () from /lib/tls/i686/cmov/libc.so.6
#6 0xb75500b6 in _IO_getline_info () from /lib/tls/i686/cmov/libc.so.6
#7 0xb7550001 in _IO_getline () from /lib/tls/i686/cmov/libc.so.6
#8 0xb754efaa in fgets () from /lib/tls/i686/cmov/libc.so.6
#9 0xb4f814ce in ?? () from /lib/libnss_mdns4.so.2
#10 0xbfc63554 in ?? ()
#11 0x00000100 in ?? ()
#12 0x0846b900 in ?? ()
#13 0x00000100 in ?? ()
#14 0xb78300e4 in g_type_check_instance_is_a () from /usr/lib/libgobject-2.0.so.0
#15 0xb4f80a51 in _nss_mdns4_gethostbyaddr_r () from /lib/libnss_mdns4.so.2
#16 0xb75dda7f in gethostbyaddr_r () from /lib/tls/i686/cmov/libc.so.6
#17 0xb75dd8a1 in gethostbyaddr () from /lib/tls/i686/cmov/libc.so.6
#18 0x0806071c in ?? ()
#19 0xb778ec36 in g_hash_table_foreach () from /usr/lib/libglib-2.0.so.0
#20 0x08060097 in ?? ()
#21 0x0806088e in ?? ()
#22 0xb779c3c6 in ?? () from /usr/lib/libglib-2.0.so.0
#23 0x081b13a0 in ?? ()
#24 0x082ae4d8 in ?? ()
#25 0xbfc63a68 in ?? ()
#26 0xb7802748 in ?? () from /usr/lib/libglib-2.0.so.0
#27 0xb7642be0 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#28 0x083f9eb0 in ?? ()
#29 0xbfc63a78 in ?? ()
#30 0xb77b3fd2 in g_slist_prepend () from /usr/lib/libglib-2.0.so.0
#31 0xb779bdf2 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#32 0xb779edcf in ?? () from /usr/lib/libglib-2.0.so.0
#33 0x08096900 in ?? ()
#34 0x00000000 in ?? ()

(gdb) info registers
output:
eax 0xfffffe00 -512
ecx 0xb4f7f000 -1258819584
edx 0x400 1024
ebx 0x12 18
esp 0xbfc6343c 0xbfc6343c
ebp 0xbfc63460 0xbfc63460
esi 0x846b900 138852608
edi 0xb4f7f000 -1258819584
eip 0xffffe410 0xffffe410 <__kernel_vsyscall+16>
eflags 0x246 [ PF ZF IF ]
cs 0x73 115
ss 0x7b 123
ds 0x7b 123
es 0x7b 123
fs 0x0 0
gs 0x33 51

(gdb) thread apply all backtrace
output:
Thread 1 (Thread -1223780656 (LWP 7513)):
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb75b8033 in read () from /lib/tls/i686/cmov/libc.so.6
#2 0xb75594f8 in _IO_file_read () from /lib/...

Does it happen without libnss-mdns installed?

Yes, I have uninstalled the package libnss-mdns and the same problem occurs

marking unconfirmed, the backtrace is of no use and I don't get the bug. We have thousand of desktop bugs open and this one is low importance on the list, maybe somebody getting the issue can send it upstream though

We are closing this bug report as it lacks the information, described in the previous comments, we need to investigate the problem further. However, please reopen it if you can give us the missing information and don't hesitate to submit bug reports in the future.