装好nvidia9631 的驱动后，因为是g4 mx440，debian etch下，显示到1440x900 刷新只有50 hz，用60
的话，字体模糊，更本不能看，用50的话，屏幕上回出现 一波一波的纹路，也不舒服，怎么办a？
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代码:
jeff@shu:~$ glxgears -printfps
5513 frames in 5.0 seconds = 1102.443 FPS
9688 frames in 5.0 seconds = 1937.337 FPS
5547 frames in 5.0 seconds = 1109.347 FPS
5768 frames in 5.0 seconds = 1153.480 FPS
5275 frames in 5.0 seconds = 1054.957 FPS
5807 frames in 5.0 seconds = 1161.376 FPS
12394 frames in 5.0 seconds = 2478.800 FPS
10915 frames in 5.0 seconds = 2182.937 FPS
12421 frames in 5.0 seconds = 2484.189 FPS
12311 frames in 5.0 seconds = 2462.181 FPS
10526 frames in 5.0 seconds = 2105.106 FPS
10293 frames in 5.0 seconds = 2058.574 FPS
15640 frames in 5.0 seconds = 3127.921 FPS
12941 frames in 5.0 seconds = 2586.560 FPS
15890 frames in 5.0 seconds = 3177.911 FPS
16608 frames in 5.0 seconds = 3321.438 FPS
16736 frames in 5.0 seconds = 3347.116 FPS
17380 frames in 5.0 seconds = 3475.981 FPS
17315 frames in 5.0 seconds = 3462.916 FPS
17222 frames in 5.0 seconds = 3444.286 FPS
17592 frames in 5.0 seconds = 3518.364 FPS
16767 frames in 5.2 seconds = 3208.163 FPS
13202 frames in 5.0 seconds = 2640.332 FPS
14085 frames in 5.0 seconds = 2816.949 FPS
10361 frames in 5.0 seconds = 2072.163 FPS
13349 frames in 5.0 seconds = 2667.500 FPS
9802 frames in 5.0 seconds = 1960.369 FPS
16916 frames in 5.0 seconds = 3383.094 FPS
15164 frames in 5.0 seconds = 3032.741 FPS
X connection to :0.0 broken (explicit kill or server shutdown).X connection to :0.0 broken (explicit kill or server shutdown). 这个什么意思？
