Comment 15 for bug 1300914

I have the same symptoms only _after_ upgrading to 3.13.0-44-generic. Can you test an earlier kernel version and see if the problem goes away?

uname -a
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Linux ndXPS13 3.13.0-44-generic #73~precise1-Ubuntu SMP Wed Dec 17 00:38:38 UTC 2014 i686 i686 i386 GNU/Linux

lspci|grep VGA
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00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

xrandr
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Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
LVDS1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 164mm
   1366x768 60.0*+ 40.0
   1360x768 59.8 60.0
   1024x768 60.0
   800x600 60.3 56.2
   640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)