Public bug reported:
>From a private bug:
"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
moesetting 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.
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
** Affects: xorg-server (Ubuntu Xenial)
Importance: Undecided
Status: New
** Affects: xorg-server (Ubuntu Yakkety)
Importance: Undecided
Status: New
** Also affects: xorg-server (Ubuntu Yakkety)
Importance: Undecided
Status: New
** Also affects: xorg-server (Ubuntu Xenial)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1636397
Title:
Fix modesetting slave output names
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