Comment 103 for bug 278471

@Aike: I found the entry <polling>false</polling> in ~/.local/screen-configurations.xml. Yes, it is false.

However, I need to clarify something about the laptop I am using. Its an HP Compaq 6530b. The laptop, per se, does not have an HDMI port. But the docking station I use has HDMI port.

xrandr -q gives:

Screen 0: minimum 320 x 200, current 1440 x 1950, maximum 2400 x 2400
VGA connected (normal left inverted right x axis y axis)
   1400x1050 60.0 +
   1600x1200 60.0 + 60.0 60.0
   1792x1344 60.0
   1280x1024 60.0 60.0
   1280x960 60.0 60.0
   1024x768 60.0
   800x600 60.3 56.2
   640x480 60.0 59.9
LVDS connected 1440x900+0+1050 (normal left inverted right x axis y axis) 303mm x 189mm
   1440x900 60.0*+
HDMI-1 connected 1400x1050+0+0 (normal left inverted right x axis y axis) 408mm x 306mm
   1400x1050 74.8*+ 60.0
   1600x1200 60.0 + 60.0
   1280x1024 85.0 85.0 75.0 60.0 60.0
   1280x960 85.0 60.0 60.0
   1152x864 75.0
   1024x768 85.0 85.0 75.1 75.0 70.1 60.0
   832x624 74.6
   800x600 85.0 85.1 72.2 75.0 60.3 56.2
   640x480 85.0 85.0 75.0 72.8 75.0 60.0 59.9
   720x400 85.0 70.1
   640x400 85.1
   640x350 85.1
HDMI-2 disconnected (normal left inverted right x axis y axis)
TV disconnected (normal left inverted right x axis y axis)

The external monitor is HP LP2065. It has a VGA as well as HDMI input. Currently, I am using HDMI port with 1400x1050 resolution. However, if I switch to the optimal resolution of 1600x1200, I cannot open a browser window maximized on the external monitor. It just goes blank and then blinks at regular interval. If, however, I have konsole on the external monitor, it works fine (even maximized.)

At 1400x1050, everything is working well, though.

I hope this gives some more insight into the issue.

Cheers.