Public bug reported: I left my notebook running over night, and when I checked in the morning I found:
PID USER PR NI VIRT RES SHR SWAP S %CPU %MEM TIME+ COMMAND 5902 root 20 0 35.1m 12.0m 1.1m 1.3m R 97.7 0.2 974:53.44 /sbin/cgmanager --sigstop -m name=systemd which now (several hours later) still didn't stop A backtrace from attaching to the process gives: (gdb) bt full #0 _dbus_connection_update_dispatch_status_and_unlock (connection=0x7f589ecb2ca0, new_status=DBUS_DISPATCH_COMPLETE) at ../../dbus/dbus-connection.c:4255 changed = <optimized out> function = <optimized out> data = <optimized out> #1 0x00007f589c0e0792 in dbus_connection_dispatch (connection=0x7f589ecb2ca0) at ../../dbus/dbus-connection.c:4522 message = <optimized out> link = <optimized out> filter_list_copy = 0x7fffa9045710 message_link = <optimized out> result = <optimized out> pending = <optimized out> reply_serial = <optimized out> status = DBUS_DISPATCH_COMPLETE found_object = 32767 __FUNCTION__ = "dbus_connection_dispatch" #2 0x00007f589c31a418 in ?? () from /lib/x86_64-linux-gnu/libnih-dbus.so.1 No symbol table info available. #3 0x00007f589c52e2ba in nih_main_loop () from /lib/x86_64-linux-gnu/libnih.so.1 No symbol table info available. #4 0x00007f589c962639 in ?? () No symbol table info available. #5 0x00007f589bd2dec5 in __libc_start_main (main=0x7f589c962410, argc=4, argv=0x7fffa90459e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa90459d8) at libc-start.c:287 result = <optimized out> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3885596728707560085, 140018560935990, 140736029022688, 0, 0, -3885696444087618923, -3792771927287614827}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7fffa9045a10, 0x7f589c95d1c8}, data = {prev = 0x0, cleanup = 0x0, canceltype = -1459332592}}} not_first_call = <optimized out> #6 0x00007f589c96285f in ?? () No symbol table info available. (gdb) bt #0 0x00007f589bdfec13 in __select_nocancel () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f589c52e239 in nih_main_loop () from /lib/x86_64-linux-gnu/libnih.so.1 #2 0x00007f589c962639 in ?? () #3 0x00007f589bd2dec5 in __libc_start_main (main=0x7f589c962410, argc=4, argv=0x7fffa90459e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa90459d8) at libc-start.c:287 #4 0x00007f589c96285f in ?? () and others, but nih appears in every trace and dbus in most ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: cgmanager 0.24-0ubuntu4 ProcVersionSignature: Ubuntu 3.13.0-21.43-generic 3.13.8 Uname: Linux 3.13.0-21-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu2 Architecture: amd64 Date: Tue Apr 15 19:32:35 2014 EcryptfsInUse: Yes ExecutablePath: /sbin/cgmanager InstallationDate: Installed on 2011-10-08 (920 days ago) InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20111007) ProcEnviron: TERM=linux PATH=(custom, no user) SourcePackage: cgmanager UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: cgmanager (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308168 Title: /sbin/cgmanager --sigstop -m name=systemd stuck for several hours using 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cgmanager/+bug/1308168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs