Hello Timo, or anyone else affected,

Accepted xorg-server-lts-xenial into trusty-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source/xorg-
server-lts-xenial/2:1.18.4-0ubuntu0.2~trusty2 in a few hours, and then
in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1636397

Title:
  Fix modesetting slave output names

Status in HWE Next:
  Fix Released
Status in xorg-server package in Ubuntu:
  Fix Released
Status in xorg-server source package in Xenial:
  Fix Released
Status in xorg-server source package in Yakkety:
  Fix Released

Bug description:
  [Impact]
  Currently, NVIDIA and modesetting drivers are using same output names, that 
creates confusion for xrandr clients like gnome-setting-daemon or xrandr 
utility.

  When modesetting outputs act as slave for other x-screen (like NVIDIA
  X-screen here), modesetting driver uses different scheme of output
  names to avoid kind of confusion we are seeing here. There is a bug in
  modesetting X-driver gets shipped with X-server, which disables slave
  output's name scheme.

  From a reviewed upstream patch:

  "Commit c7e8d4a6ee9542f56cd241cf7a960fb8223a6b22 had already
  unifdef MODESETTING_OUTPUT_SLAVE_SUPPORT but commit
  9257b1252da9092ddc676fec9aabe2b33dfad272 didn't notice that."

  so we need to backport that to zesty/yakkety/xenial.

  [Test Case]
  Enable dGPU, test that output to DP works.

  [Regression Potential]
  There should be none, as this leftover was a simple mistake that shouldn't be 
there.

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