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[Bug 745112] Re: [arrandale] desktop is messed up (goes black) when laptop is docked with two external 1920x1200 monitors (x86_64)

 

I added that ppa and updated, and did a bit more testing.  It seemed to
work a bit better, though not in the way I would have expected.

classic/no-effects: I started undocked, and actually got docking once to
work perfectly (both monitors lit up, desktop displayed on both).
However when I undocked and re-docked again, my right monitor didn't
light up (although I got my desktop on the left monitor).  I was not
able to get the right monitor to turn on again, after trying "xset dpms
force on" , the gnome monitor GUI, going to tty1 and back, etc.  This
situation was stable after a couple more undock/redock cycles.  I never
got into the black screen/moving mouse pointer situation.  The kernel
log never showed any intel graphics related stuff (just USB devices
appearing/disappearing and other docking related stuff).  And
i915_error_state stayed "no error state collected".

unity: Again I actually got docking to work once; however the second
time I docked, I got the black screen/moving mouse pointer and right
monitor stuck with no signal.  However neither the kernel log nor the
error_state file showed anything.

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https://bugs.launchpad.net/bugs/745112

Title:
  [arrandale] desktop is messed up (goes black) when laptop is docked
  with two external 1920x1200 monitors (x86_64)