Comment 28 for bug 1295267

I did not have this issue with Ubuntu 14.04 but now I have it with 16.04 with the same hardware. Windows from the screen on the right move to the screen on the left if the screen is locked for a while. I have one screen on DVI and another on HDMI. Both are the same model (BenQ GW2460). I have an Intel integrated GPU with Oibaf drivers.

$ xrandr
Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
HDMI1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080 60.00*+
   1680x1050 59.88
   1600x900 60.00
   1280x1024 75.02 60.02
   1280x800 59.91
   1152x864 75.00
   1280x720 60.00
   1024x768 75.08 60.00
   832x624 74.55
   800x600 75.00 60.32
   640x480 75.00 60.00
   720x400 70.08
HDMI2 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080 60.00*+ 50.00 59.94
   1920x1080i 60.00 50.00 59.94
   1680x1050 59.88
   1600x900 60.00
   1280x1024 75.02 60.02
   1280x800 59.91
   1152x864 75.00
   1280x720 60.00 50.00 59.94
   1024x768 75.08 60.00
   832x624 74.55
   800x600 75.00 60.32
   720x576 50.00
   720x576i 50.00
   720x480 60.00 59.94
   720x480i 60.00 59.94
   640x480 75.00 60.00 59.94
   720x400 70.08
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

$ sudo dmidecode -t 2
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
 Manufacturer: Gigabyte Technology Co., Ltd.
 Product Name: H87-D3H-CF