Mmm....I just noticed one thing: It seems that the Xorg cpu usage became high only when "system monitor" is open.
when I close it, Xorg cpu usage returns low: top - 09:04:33 up 31 min, 2 users, load average: 0.16, 0.55, 0.63 Mem: 2062040k total, 837608k used, 1224432k free, 39880k buffers Swap: 1992052k total, 0k used, 1992052k free, 410244k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7722 root 20 0 902m 35m 9780 S 1 1.8 0:26.68 Xorg 5214 messageb 20 0 21644 1520 764 S 1 0.1 0:00.90 dbus-daemon 7949 mangus 20 0 241m 36m 13m S 1 1.8 0:05.28 compiz.real 8049 mangus 20 0 263m 25m 12m S 1 1.3 0:00.40 gnome-terminal 8074 mangus 20 0 18988 1284 932 R 1 0.1 0:00.64 top -- [Hardy] Xorg high CPU usage with 2.6.24 kernel and nvidia-glx https://bugs.launchpad.net/bugs/178400 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs