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

 

** Package changed: unity-control-center (Ubuntu) => xserver-xorg-video-
intel (Ubuntu)

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

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

Status in xserver-xorg-video-intel 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