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[Madper Xie <madper.xie@xxxxxxxxxxxxx>]

Public bug reported:

[Testbed]
Hardware:
A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port.
Software:
Ubuntu 14.04
xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1

[Reproducer]
1. Press FN + hot key to change the display mode.
2. Watching the built-in monitor.

[Expect result]
there should be 4 modes:
Internal only  -> extended mode -> mirror mode -> external only

[Actual result]
mirror-mode  ->  extended mode  ->  *black mode*[1]  twice ->  mirror mode  -> internal only  ->  external only

[1]: black mode means, the screen is black, backlight works well.
Nothing displayed. Only cursor showed. It moves if I touch my mouse.

[How reproducible]
100% with my laptop.

[old version?]
after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue.

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  [Testbed]
  Hardware:
  A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port.
  Software:
  Ubuntu 14.04
  xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  
  [Reproducer]
  1. Press FN + hot key to change the display mode.
  2. Watching the built-in monitor.
  
  [Expect result]
  there should be 4 modes:
  Internal only  -> extended mode -> mirror mode -> external only
  
  [Actual result]
- mirror-mode  ->  extended mode  ->  *black mode*[1]  *2 ->  mirror mode  -> internal only  ->  external only 
+ mirror-mode  ->  extended mode  ->  *black mode*[1]  *2 ->  mirror mode  -> internal only  ->  external only
  
  [1]: black mode means, the screen is black, backlight works well.
  Nothing displayed. Only cursor showed. It moves if I touch my mouse.
  
  [How reproducible]
  100% with my laptop.
+ 
+ [old version?]
+ after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue.

** Description changed:

  [Testbed]
  Hardware:
  A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port.
  Software:
  Ubuntu 14.04
  xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  
  [Reproducer]
  1. Press FN + hot key to change the display mode.
  2. Watching the built-in monitor.
  
  [Expect result]
  there should be 4 modes:
  Internal only  -> extended mode -> mirror mode -> external only
  
  [Actual result]
- mirror-mode  ->  extended mode  ->  *black mode*[1]  *2 ->  mirror mode  -> internal only  ->  external only
+ mirror-mode  ->  extended mode  ->  *black mode*[1]  twice ->  mirror mode  -> internal only  ->  external only
  
  [1]: black mode means, the screen is black, backlight works well.
  Nothing displayed. Only cursor showed. It moves if I touch my mouse.
  
  [How reproducible]
  100% with my laptop.
  
  [old version?]
  after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1382494

Title:
   unexpected black screen when changing display mode.

Status in “xserver-xorg-video-intel” package in Ubuntu:
  New

Bug description:
  [Testbed]
  Hardware:
  A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port.
  Software:
  Ubuntu 14.04
  xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1

  [Reproducer]
  1. Press FN + hot key to change the display mode.
  2. Watching the built-in monitor.

  [Expect result]
  there should be 4 modes:
  Internal only  -> extended mode -> mirror mode -> external only

  [Actual result]
  mirror-mode  ->  extended mode  ->  *black mode*[1]  twice ->  mirror mode  -> internal only  ->  external only

  [1]: black mode means, the screen is black, backlight works well.
  Nothing displayed. Only cursor showed. It moves if I touch my mouse.

  [How reproducible]
  100% with my laptop.

  [old version?]
  after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue.

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