On 08/02/2012 04:00 PM, David C. Rankin wrote: > > It's like there is some very bad race condition created in X when using gtk > apps with the nvidia driver? For what it is worth, I tested a SuSE box with MozillaThunderbird-14.0-2.1.x86_64 and xorg-x11-7.6-227.1.x86_64. The combined CPU usage of tbird and X never exceeds 40%. (radeonhd driver) Let me know if I can send anything else from the Arch box exhibiting the high cpu usage. -- David C. Rankin, J.D.,P.E.