Ok, a workaround seems to be setting the saturation to 100%, it seems any addon that modifies the saturation causes the CPU to spike.
** Description changed: - When using the Dim Inactive function in Compiz, it takes about 80% CPU - usage, causing the fans on my laptop to run constantly whenever this is - enabled. + When using any addon that desaturates windows in Compiz, it takes about + 80% CPU usage, causing the fans on my laptop to run constantly whenever + this is enabled. I will attach screenshots below. Steps to Reproduce: Enable Dim Inactive in ccsm Open two windows, monitor cpu usage Use keyboard shortcut to toggle dimming on and off Compiz-Plugins version 1:0.9.8.6-0ubuntu1 from synaptic Graphics Card: Dual Graphics (AMD Radeon) 00:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI BeaverCreek [Mobility Radeon HD 6620G] 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Whistler [AMD Radeon HD 6600M Series] Video Driver: fglrx-updates Distribution: 12.10 Ubuntu Configuration in GConf ** Summary changed: - High CPU usage when using Dim Inactive + High CPU usage when using any addon which desaturates windows -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1159054 Title: High CPU usage when using any addon which desaturates windows To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1159054/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs