Thomas, I'm also having Xorg/compiz CPU usage issues for which I submitted bug report, and I was wondering if you could follow the steps I outlined and see if you get similar results: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1337749
Basically on a fresh boot, launch "top" in a terminal to monitor CPU usage. Then launch a Nautilus window and start moving it around, noting CPU usage. Then resize the window, and try moving it around and see what happens with the CPU usage. For me, CPU usage jumps from 4% to around 30-40% (before/after the resize) using the open source radeon driver. With fglrx it starts higher at around 15-20%, and jumps to 60-70% after resizing. Even just scrolling down a page in Firefox results in ~70% CPU usage. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1293384 Title: Compiz CPU usage dramatically increased in Ubuntu 14.04 Status in Compiz: Triaged Status in “compiz” package in Ubuntu: Triaged Bug description: It appears that the workload of low-level graphical operations used by compiz when, for example, moving windows has increased dramatically between Ubuntu 12.04 and Ubuntu 14.04. This might not be that visible when using high-end gpus, but should be clearly visible when using compiz on llvmpipe and to some-extent invalidates the approach of using compiz on top of llvmpipe as a fallback when no GPU is available: How to reproduce: 1) Use the unity-3d desktop in Ubuntu 14.04 on top of a non-accelerating Xorg driver like "modesetting". Move windows around. Note peak and average cpu-usage. How to verify compiz is the culprit: 1) copy /usr/bin/compiz from a Ubuntu 12.04 installation. Drop it in as /usr/bin/compiz on 14.04. Reboot. Perform the same window movement. CPU-usage should be substantially lower. This problem also affects VMs running on VMware ESX with a software- rendering GPU. Window movement becomes sluggish, which suggests that even with GPUs, compiz has increased the number of operations required to move windows. To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1293384/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
