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

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1530171@xxxxxxxxxxxxxxxxxx>
Date: Sun, 10 Jan 2016 18:32:57 -0000
Reply-to: Bug 1530171 <1530171@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

You have been subscribed to a public bug:

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.

** Affects: xorg (Ubuntu)
     Importance: Low
         Status: Incomplete

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[Regression] Thinkpad dock: External monitors not recognized after 15.04 upgrade
https://bugs.launchpad.net/bugs/1530171
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