为什么修改分辨率失败?

lfabc

solaris 10 ,x4200 的服务器.
以root运行/usr/X11/xorgconfig,修改显示分辨率
重起后并未生效.
You must indicate the horizontal sync range of your monitor. You can either
select one of the predefined ranges below that correspond to industry-
standard monitor types, or give a specific range.
It is VERY IMPORTANT that you do not specify a monitor type with a horizontal
sync range that is beyond the capabilities of your monitor. If in doubt,
choose a conservative setting.
   hsync in kHz; monitor type with characteristic modes
1  31.5; Standard VGA, 640x480 @ 60 Hz
2  31.5 - 35.1; Super VGA, 800x600 @ 56 Hz
3  31.5, 35.5; 8514 Compatible, 1024x768 @ 87 Hz interlaced (no 800x600)
4  31.5, 35.15, 35.5; Super VGA, 1024x768 @ 87 Hz interlaced, 800x600 @ 56 Hz
5  31.5 - 37.9; Extended Super VGA, 800x600 @ 60 Hz, 640x480 @ 72 Hz
6  31.5 - 48.5; Non-Interlaced SVGA, 1024x768 @ 60 Hz, 800x600 @ 72 Hz
7  31.5 - 57.0; High Frequency SVGA, 1024x768 @ 70 Hz
8  31.5 - 64.3; Monitor that can do 1280x1024 @ 60 Hz
9  31.5 - 79.0; Monitor that can do 1280x1024 @ 74 Hz
10  31.5 - 82.0; Monitor that can do 1280x1024 @ 76 Hz
11  Enter your own horizontal sync range
Enter your choice:
选了8

You must indicate the vertical sync range of your monitor. You can either
select one of the predefined ranges below that correspond to industry-
standard monitor types, or give a specific range. For interlaced modes,
the number that counts is the high one (e.g. 87 Hz rather than 43 Hz).
1  50-70
2  50-90
3  50-100
4  40-150
5  Enter your own vertical sync range
Enter your choice:
选了2

...

Shall I write it to /etc/X11/xorg.conf? y

然后重起,却没生效
为什么啊?

bsdwelt

kdmconfig Xserver 选了 Xorg 还是 Xsun？

lfabc

xorg