Power manager status icon in the Notification Applet does not switch from AC power to Battery when unplugged, although the screen dims. Since it still shows as AC power, it does not show an estimate of battery time left. If it is unplugged at login, it will switch to AC power status when plugged in, but not back if unplugged again. A work around for this is to add the add the following line in /etc/rc.local before the exit 0 line
/etc/init.d/laptop-mode start service laptop-mode status
ついでに、 Video (.AVI, etc) aspect ratio is way off. Much narrower horizontally than should be. This is because Xorg incorrectly detects the physical display size as 451mm x 113mm. A workaround for this is to force it with xrandr --fbmm 195x113. This can be made persistent by creating a script /etc/gdm/Init/:0 containing:
#!/bin/sh xrandr --fbm 195x113 Make it executable with chmod 755 /etc/gdm/Init/:0.