Red Hat Bugzilla – Bug 966416
grub uses 100% cpu
Last modified: 2013-06-03 21:26:04 EDT
Description of problem:
Not sure what it is doing by grub seems to use a lot CPU
when it is running.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. start grub and press e to edit menu
2. wait and watch CPU and temperature
3. press Ctrl-x
2. system uses 1 cpu and temperature rises
3. temperature fails again
grub should only need a little CPU.
This is an old bug it has been happening for quite a long time:
I think it often causes my old Thinkpad T500 to not reboot due to overheating.
Grub might be a full OS and kernel but it is not yet as feature complete and sophisticated as linux. Is it reasonable to expect it to include power management?
I see, so this is expected behavior?
I could be wrong but I don't think grub1 used 100% cpu.
On my systems, including VMs, grub legacy and grub2 both fully consume one CPU core. So while I don't like it, I don't see the difference in behavior between the two grubs.
Okay fair enough - maybe it is something that could be or has been discussed upstream: probably this bug can be closed then. I will try to pass through
grub quickly on my laptop with poor/broken fan to avoid it overheating.