Fedora 10 intel 显卡驱动

binny

最近 yum update 后，登陆 x，出现如下错误：
(EE) intel(0): Failed to set tiling on front buffer: rejected by kernel
(EE) intel(0): Failed to set tiling on back buffer: rejected by kernel
(EE) intel(0): Failed to set tiling on depth buffer: rejected by kernel
glxgear 也从 960多下降到260多，是什么原因？
我的显卡是i915.