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[Bug 1530171] Re: [Regression] Thinkpad dock: External monitors not recognized after 15.04 upgrade

 

** No longer affects: udev

** Package changed: ubuntu => unity-control-center (Ubuntu)

** Description changed:

  On Thinkpad L540 with intel graphics:
  
- External monitors are not recognized in display settings when plugged in
- (into any port including VGA).
+ External monitors are not recognized in display settings when plugged
+ into any dock port.
  
  They *are* recognized after a reboot (not after logout).
  After plugging out and the in again they are not recognized.
  
- A monitor plugged into the internal VGA is recognized instantly.
+ A monitor plugged in and out of the non-dock VGA is recognized instantly.
+ After plugging in or out of the non-dock VGA, monitors plugged to dock ports are recognized (which serves as a crazy workaround for me now).
  
  Everything used to work with 14.10, but stopped with 15.04.
  
  A recent test with 1510 live CD did not fix this.

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https://bugs.launchpad.net/bugs/1530171

Title:
  [Regression] Thinkpad dock: External monitors not recognized after
  15.04 upgrade

Status in unity-control-center package in Ubuntu:
  New

Bug description:
  On Thinkpad L540 with intel graphics:

  External monitors are not recognized in display settings when plugged
  into any dock port.

  They *are* recognized after a reboot (not after logout).
  After plugging out and the in again they are not recognized.

  A monitor plugged in and out of the non-dock VGA is recognized instantly.
  After plugging in or out of the non-dock VGA, monitors plugged to dock ports are recognized (which serves as a crazy workaround for me now).

  Everything used to work with 14.10, but stopped with 15.04.

  A recent test with 1510 live CD did not fix this.

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References