如何调整Beagle board XM 的LCD分辨率

这个请您参见linux中LCD驱动的编写。

"DSS2" display driver for >= 2.6.29
Tomi has updated the display driver and has a clone of his tree on Gitorious. The kernel sources contain the DSS2 documentation. The syntax has been updated a bit, so it is worth re-examining. This updated driver seems to being used in Angstrom builds of the BeagleBoard kernel starting with 2.6.29.
Example:
   omapfb.mode=dvi:1024x768MR-16@60
   omapfb.mode=dvi:1280x720MR-16@60 (for 720p HDTV with 1:1 pixel mapping)
   omapfb.mode=dvi:1280x1024MR-16@60 (tested on revB7, actual output is 57MHZ and may not work on some devices)
   omapfb.mode=dvi:1360x768MR-16@60 (works nice on 720p HDMI TV which crops edges due to overscan)
Note: the M indicates the kernel will calculate a VESA mode on-the-fly instead of using modedb lookup. The R indicates reduced blanking which is for LCD monitors. Most HDTV will probably only operate with a VESA mode.
elinux.org/BeagleBoardFAQ
this link is you need for Beagleboard