Hi all. I'm having a performance issue with gnome shell and I wonder if anyone can provide me with some advice. Gnome shell seems to be using a lot of my cpu resources. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 949 pico 20 0 1923m 204m 21m S 203.3 5.4 136:04.53 gnome-shell When I enable threaded mode in top (H) is see this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 953 pico 20 0 1923m 204m 21m R 50.1 5.4 31:22.91 gnome-shell 955 pico 20 0 1923m 204m 21m R 48.7 5.4 31:41.81 gnome-shell 952 pico 20 0 1923m 204m 21m R 47.1 5.4 31:03.14 gnome-shell 954 pico 20 0 1923m 204m 21m R 45.1 5.4 31:22.46 gnome-shell That is it's using about 50% of each of my cores on my quad core system. This high cpu usage starts when I run a command that produces a lot of output on the terminal. For my own use case I was importing the boost repostory into git. git svn clone http://svn.boost.org/svn/boost But the problem can be reproduced using the 'yes' command as well. Can anyone explain this high cpu usage? It happens even if I minimize the window producing the output. Is it worth submitting a bug report for it? I'm on a T510 Lenovo laptop with an updated Arch and I'm using the nouveau driver. Thanks in advance for any suggestions. Regards, Pico