Problem:
default resolution is not support by my moniter. There is black screen on the monitor but remote ssh login is available.
Solution:
1. check /var/log/xorg.0.log to find out monitor name and allowed resolution. or run command to findout
[root@test log]# xrandr -d :0
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 384mm x 306mm
1280x1024 56.3*+ 60.0
1280x960 60.0
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
2. change resolution with command from termial
xrandr -d :0 --output VGA-0 --mode 1152x864
reference:
http://askubuntu.com/questions/405645/how-to-enable-monitor-from-terminal
