gdm3 nvidia modeset=1 is broken, external screens don't work on a Thinkpad p50
Bug #1706474 reported by
Tim Richardson
This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gdm3 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
nvidia-graphics-drivers-375 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
ubuntu 17.04 with gnome desktop.
The laptop is a Thinkpad p50 with a quadro M1000M.
To get this bug I am using the hybrid graphics mode.
This problem occurs with 375.82 and also with the new 384 driver.
When using gdm3 and
options nvidia_375_drm modeset=1
the greeter only shows the laptop screen. My two external displays are not turned on.
they do not appear in the listing of diplays in xrandr
the problem does not occur if
modeset=0
or if I use lightdm
I suspect this is a known bug but I am not quite sure so I'm reporting it.
description: | updated |
tags: | added: black-screen gnome-17.10 multimonitor nvidia |
tags: |
added: zesty removed: gnome-17.10 |
summary: |
- gdm3 nvidia modeset=1 is broken, external screens don't work + gdm3 nvidia modeset=1 is broken, external screens don't work on a + Thinkpad p50 |
To post a comment you must log in.
I think it might be a general problem with Wayland (which is what gets used if you set modeset=1):
https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 94851
So GDM/Wayland uses the first GPU only, which is your Intel GPU, the one wired to the laptop screen.