I have a very similar issue, but on Acer Aspire 3820TG-7360 with Intel
builtin i3-370M and ATI Mobility Radeon HD 5650. However, in my case the
two displays are both called "Built-in Display". And my xrandr -q output
shows that the first is LVDS1 while the second is LVDS-1-1 (see below).
This was an issue during the installation as well and made it difficult
to install (I had to reboot several times) because the installation
dialogue occasionally appeared offscreen on the non-existant display,
rather than the actual display (as seen by screen tearing and using Alt-
Tab). Attaching an external monitor merely adds a third display. This
renders my installation unstable as often my laptop screen goes is blank
at the login screen, (although I can hear the login music) or there seem
to be two, overlapping login screens. Once logged in, I can mirror the
displays to prevent windows opening in the non-existant display, but
graphics are slow and tearing.
The fix above did not help.
Should I open a new bug report? Or is this simialr enough to be
considered the same? I'm happy to provide any more information that
could help.
Thanks
xrandr -q
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 165mm
1366x768 60.0*+
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)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
LVDS-1-1 connected 1366x768+0+0 0mm x 0mm
1366x768 60.0*+
1280x720 59.9
1152x768 59.8
1024x768 59.9
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
HDMI-1-0 disconnected
VGA-1-1 disconnected
1366x768 (0x49) 72.3MHz
h: width 1366 start 1414 end 1446 total 1526 skew 0 clock 47.4KHz
v: height 768 start 771 end 776 total 790 clock 60.0Hz
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https://bugs.launchpad.net/bugs/1296020
Title:
[Asus U36JC] Non-existent display detected in both intel driver and
nvidia driver (Optimus Laptop) (ubuntu trusty 14.04)
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