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Message #155026
[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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1530171/+subscriptions
References