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I want to give Gnome-Shell the highest priority, but I couldn't change the priority on the System Monitor, an error messeage says: Can't change priority's process with pid 2841 to -5. Access denied

I tried the following commands:

gksu gnome-system-monitor

But I can't find Gnome-Shell on the processes list, so I tried "renice command", like this:

sudo renice -15 2841

And finally got this problem, the Gnome-Shell's PID always changes, it's not the same PID numbers, so I have to change the priority every time I start up my system.

Can anyone help me? Thanks.

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  • Why would you want to reassign Gnome-Shell priority process?! The system manages just fine on its own, or is there any particular reason?!
    – v2r
    Mar 3, 2012 at 10:07
  • I want to do that because ATI Driver is not fully compatible and sometimes Gnome Shell disappears for a few seconds then returns back, and some other time it disappears and suddenly falls back to classic mode without panels, so I have to hit ctrl+alt+del to logout and login back again, not to mention that some times the ctrl+alt+del method doesn't work and find myself with no option but power off my laptop and turn it on again.
    – user32655
    Mar 3, 2012 at 11:58
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    Playing with the priority of processes will not help - your problem is with your graphics driver & your graphics card. What driver are you using? what graphics card (lspci | grep VGA) and what version of ubuntu? Remember - edit all responses back into your question.
    – fossfreedom ♦
    Mar 3, 2012 at 17:36
  • I'm using Ubuntu 11.10 x64 and my graphic driver is ATI, changing the priority somehow helps a little bit, I want to change it until ATI fixes all GNOME 3 problems, that if they did anyway...
    – user32655
    Mar 3, 2012 at 21:23
  • You just keep asking me why do I need to change the priority, just tell me how to do it, that will be more helpful than answering me with questions.
    – user32655
    Mar 4, 2012 at 12:49

1 Answer 1

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I have to agree with your commenters that this is not a good idea and not likely to help, and I can't really recommend it, but here goes:

renice -15 -p $(pgrep gnome-shell)

This will figure out the PID of gnome-shell and change the priority. You would need to run the command as root and place it in a cron job so that it would automatically renice all processes with that name.

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