Arch Linux

Jinmenju

Member

Registered: 2012-09-17

Posts: 9

Thinkpad T430: X lags when connecting screen on DisplayPort

Whenever I connect a screen using the DisplayPort, X starts hanging every 2 seconds, which is extremely annoying. If I disable the connected screen (using e.g. xrandr), X stops lagging.

output of 'xrandr -q'

Screen 0: minimum 8 x 8, current 3520 x 1080, maximum 32767 x 32767
LVDS1 connected 1600x900+1920+0 (normal left inverted right x axis y axis) 309mm x 174mm
   1600x900      60.01*+  40.00  
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
DP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00*+  50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1600x900      59.98  
   1280x1024     75.02    60.02  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.08    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)