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[markb <881955@xxxxxxxxxxxxxxxxxx>]

Not sure if helpful but further to my above comment I find that gnome-
system-monitor locks up in a futex() call:

stat64("/proc/2426", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
stat64("/proc/2427", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
stat64("/proc/2500", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
stat64("/proc/2501", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
stat64("/proc/2506", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
getdents(14, /* 0 entries */, 32768)    = 0
close(14)                               = 0
open("/proc/stat", O_RDONLY)            = 14
read(14, "cpu  7326 189 2427 91947 15582 0"..., 8191) = 1787
read(14, "", 6404)                      = 0
close(14)                               = 0
stat64("/proc/1707", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
open("/proc/1707/stat", O_RDONLY)       = 14
read(14, "1707 (gnome-session) S 1157 1707"..., 8191) = 224
read(14, "", 7967)                      = 0
close(14)                               = 0
open("/proc/1707/stat", O_RDONLY)       = 14
read(14, "1707 (gnome-session) S 1157 1707"..., 8191) = 224
read(14, "", 7967)                      = 0
close(14)                               = 0
open("/proc/1707/cpu", O_RDONLY)        = -1 ENOENT (No such file or directory)
open("/proc/1707/cmdline", O_RDONLY|O_LARGEFILE) = 14
fstat64(14, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
fcntl64(14, F_GETFL)                    = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat64(14, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb3feb000
_llseek(14, 0, [0], SEEK_CUR)           = 0
read(14, "/usr/bin/gnome-session\0--session"..., 4096) = 39
read(14, "", 3072)                      = 0
close(14)                               = 0
munmap(0xb3feb000, 4096)                = 0
open("/proc/1707/attr/current", O_RDONLY|O_LARGEFILE) = 14
read(14, "unconfined\n", 4095)          = 11
close(14)                               = 0
futex(0xb62c8b64, FUTEX_WAKE_PRIVATE, 2147483647) = 0

Sits on last line above at 100% cpu.

If I run transmission-gtk under strace then it won't fail but if I run
it normally and then attach strace after it locks up, then it is also
sitting on a futex() call at 100% cpu (although in this case it also
hangs my gnome-shell session).

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-system-monitor in Ubuntu.
https://bugs.launchpad.net/bugs/881955

Title:
  System monitor freezes up when switching to Processes tab

Status in “gnome-system-monitor” package in Ubuntu:
  Confirmed

Bug description:
  Gnome-system-monitor 3.20 becomes unresponsive when I switch to the
  Processes tab. Any other tab works. This is reproducible as it happens
  every time. The app does not crash but seems to hang in a loop. I am
  running Oneiric x64

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: gnome-system-monitor 3.2.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Wed Oct 26 07:03:31 2011
  ExecutablePath: /usr/bin/gnome-system-monitor
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110804)
  SourcePackage: gnome-system-monitor
  UpgradeStatus: Upgraded to oneiric on 2011-09-11 (44 days ago)

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