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[Neal Coleman <coleman.neal@xxxxxxxxx>]

I have a ThinkPad X230T running 15.04 with Unity. I confirm that
thinkpad-rotate flip causes the screen to go black with just the cursor
visible and responsive to the window it's over (albeit with stylus input
inverted relative to the screen). ctrl+alt+F1 then ctrl+alt+F7 serve to
restore the windows (and stylus input is correct relative to the screen
after this).

I would be happy to run any tests if it would be useful to diagnosing
and fixing this bug.

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https://bugs.launchpad.net/bugs/1451798

Title:
  black screen (but with cursor) after rotating by 180 degrees

Status in x11-xserver-utils package in Ubuntu:
  Confirmed

Bug description:
  I use `xrandr --output LVDS1 --rotate inverted` to rotate the contents
  of my screen by 180 degrees as part of my thinkpad-scripts. This has
  worked well until Kubuntu 14.10. Now it still works when I have an
  external screen (DP2) attached.

  I just tried it out now without an external screen attached. The
  screen turns black, but I can still see the mouse cursor. The cursor
  also changes according to the program that it is on, one just does not
  see the program. I can also click and it will have some effect.

  To see the screen again, I do [Ctrl][Alt][F1] and then
  [Ctrl][Alt][F7]. Somebody else has the same ThinkPad X220 with Ubuntu
  (not sure the version, though) but uses Unity. He has the exact same
  problem, so this is not bound to KDE or Unity, but fundamental to
  something that `xrandr` does.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: x11-xserver-utils 7.7+2ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Tue May  5 13:48:54 2015
  InstallationDate: Installed on 2014-10-07 (209 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
  SourcePackage: x11-xserver-utils
  UpgradeStatus: Upgraded to vivid on 2015-04-29 (5 days ago)

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