Fix modesetting slave output names

[Timo Aaltonen]

[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.

[Launchpad Janitor (janitor)]

This bug was fixed in the package xorg-server - 2:1.18.4-1ubuntu7

---------------
xorg-server (2:1.18.4-1ubuntu7) zesty; urgency=medium

  * modesetting-unifdef-slave-support.diff: Fix modesetting slave output
    names. (LP: #1636397)

 -- Timo Aaltonen <email address hidden> Tue, 25 Oct 2016 10:48:45 +0300

[Chris Halse Rogers (raof)]

Hello Timo, or anyone else affected,

Accepted xorg-server into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-0ubuntu0.2 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 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!

[Chris Halse Rogers (raof)]

Hello Timo, or anyone else affected,

Accepted xorg-server into yakkety-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-1ubuntu6.1 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 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!

[Brian Murray (brian-murray)]

This seems to have caused a regression with the unity8 test:

http://autopkgtest.ubuntu.com/packages/u/unity8/xenial/i386

Could someone have a look at this?

[Martin Pitt (pitti)]

unity8 tests have always been brittle; the autopilot ones (which use X) succeeded, while the QML ones (which don't use X) didn't, so this appears unrelated.

[Launchpad Janitor (janitor)]

This bug was fixed in the package xorg-server - 2:1.18.4-0ubuntu0.2

---------------
xorg-server (2:1.18.4-0ubuntu0.2) xenial; urgency=medium

  * modesetting-unifdef-slave-support.diff: Fix modesetting slave output
    names. (LP: #1636397)

 -- Timo Aaltonen <email address hidden> Tue, 01 Nov 2016 10:08:51 +0200

[Martin Pitt (pitti)]

The verification of the Stable Release Update for xorg-server has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package xorg-server - 2:1.18.4-1ubuntu6.1

---------------
xorg-server (2:1.18.4-1ubuntu6.1) yakkety; urgency=medium

  * modesetting-unifdef-slave-support.diff: Fix modesetting slave output
    names. (LP: #1636397)

 -- Timo Aaltonen <email address hidden> Tue, 01 Nov 2016 10:06:42 +0200

[Timo Aaltonen (tjaalton)]

yakkety has this, close HWE next task

[Chris Halse Rogers (raof)]

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~trusty1 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!

[Brian Murray (brian-murray)]

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!