Ubuntu
linux package

  1. Bug #590516
  2. Comment #6

Comment 6 for bug 590516

Revision history for this message
Rioting_Pacifst (rioting-pacifist) wrote : Re: resume hangs kernel with nouveau drivers

Hi I've been having suspend/resume issues with cgroups and this bug came up in a search I believe your problem is caused by https://bugs.launchpad.net/ubuntu/+source/libcgroup/+bug/693594

Do you have a multicore/hyperthreaded machine?
If so could you try the following
* Open a few root prompts
* check mount for where your cgroups fs is (mine is /sys/fs/cgroup/cpu/ on previous versions of ubuntu it may be elsewhere)
* In one try turning your 2nd processor off and on a few types ( e.g echo 0 > /sys/devices/system/cpu/cpu1/online ).
* If that locks up use a second prompt to run (echo 950000 > /sys/fs/cgroup/cpu/sysdefault/cpu.rt_runtime_us ) if this unlocks up the processor shutdown, a suspend/resume should now work.
* If suspend/resume works after putting a value in /sys/fs/cgroup/cpu/sysdefault/cpu.rt_runtime_us please mark this bug a duplicate of 693594 and look there for permanent fixes