In a more pure development environment, I can confirm this bug without
needing hybrid GPUs, or gdm3.
Just the Nvidia driver and Xorg results in no outputs/monitors detected:
$ xrandr
Screen 0: minimum 8 x 8, current 640 x 480, maximum 16384 x 16384
To work around the problem I need to run Xorg a
** Tags added: nvidia-drm.modeset
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Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detected
Status in gdm3 packag
This works. Thanks. What does gdm3 do that requires this?
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Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detecte
The solution to this is to run X11 as root, so it can use VGA arbiter
and detect displays on both the NVIDIA and modesetting drivers.
Add this to /etc/X11/Xwrapper.config :
needs_root_rights = yes
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I'm on Ubuntu 19.04 as well and having issues with this.
I have an i7-8750h paired with a gtx 1050ti in a Dell G515.
I don't exactly what I did, but I can give a general idea:
I decided this morning that battery life was important to me, so I
tinkered around with TLP. After I did that everything
Still present in 19.04, although as a workaround, the nvidia drivers
have reverted to installing without modeset=1, so external monitors
work, and Optimus users get dreadful tearing on their laptop's internal
screen.
With modeset=1 (which in my case was a setting preserved during the update to
19
After adding the line "/usr/bin/xinit" to gdm3.service I get this in
every boot:
ProblemType: Crash
Architecture: amd64
Date: Mon Mar 25 19:17:11 2019
DistroRelease: Ubuntu 18.04
ExecutablePath: /usr/lib/xorg/Xorg
ExecutableTimestamp: 1543339632
ProcCmdline: /usr/lib/xorg/Xorg :0
...
Did you guys
Forgot to add: Ubuntu 18.04.2
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Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detected
Status in gdm3 package in
I confirm the bug exists and workarounds work, both with lightdm and
ExecStartPre line. Also, adding xinit to ExecStartPre messes up suspend
functionality. That is a pity...
Laptop: Thinkpad P1 with nvidia graphics
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Personally, I have not encountered that when using ubuntu or fedora and
simply swapping gdm3 for lightdm but it's good that the other bug report
has a fix. It looks like a hidpi bug; none of my monitors are hidpi.
On Thu, 21 Feb 2019 at 12:50, Stefano <1716...@bugs.launchpad.net>
wrote:
> The pro
The problem with the lightdm workaround is that many had this cursor
issue:
https://bugs.launchpad.net/ubuntu/+source/xfce4-settings/+bug/1770948
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Yes I was talking about the gdm3 workaround
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Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detected
Status in g
There are two workarounds mentioned: swap to lightdm and manipulate gdm3
start. I think you refer to the gdm3 startup changes when you say it causes
problems with suspend/resume (which I didn't try).
The other workaround is changing display manager to lightdm (or sddm, the
KDE display manager).
swa
Yes but this workaround is going to create others issue for suspend and
resume.
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Title:
gdm3, hybrid nvidia with modeset=1, no ext
Running Ubuntu 18.10 here. Wanted to do a presentation with my Notebook, but it
failed me cause of this bug.
I can confirm that it works "Out of the box" with lightdm and that it also
works with gdm3 if you modify /lib/systemd/system/gdm3.service, changing the
"ExecStartPre" line to the above me
Same issue in here on Ubuntu 18.04.1 LTS. I have a Dell G3 3579 with Nvidia
Geforce 1050TI. I've tried to use a Samsung SmartTV as a secondary display
connected to HDMI port but Gnome settings only shows laptop display. I've
tested drivers 390, 396, 410, and 415 without success. This issue doesn
sddm works too: I just put kde plasma on my ThinkPad P50 with ubuntu
18.10, it works well.
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Title:
gdm3, hybrid nvidia with modese
18.10 Lightdm works but GDM works only with the mentioned
hack/workaround (but with slowdowns):
ExecStartPre=/usr/bin/xinit /usr/share/gdm/generate-config
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** Tags removed: artful
** Tags added: cosmic
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Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detected
Status i
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu)
Status: New => Confirmed
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Tim, are you really saying just that one-line change fixed it?...
I can confirm at least that /usr/share/gdm/generate-config is introduced
only by Debian/Ubuntu packaging. It's not part of the upstream GDM
project. So if Fedora's approach of running under xinit works then we
should probably do the
Celebratory fireworks from me.
It seems to work. For ubuntu the only difference is
[Service]
ExecStartPre=/usr/share/gdm/generate-config
becomes
[Service]
ExecStartPre=/usr/bin/xinit /usr/share/gdm/generate-config
I have a proper ubuntu gnome session running with gdm, an external
monitor an
ubuntu user Hon Weng Chong has emailed me as he continues to investigate the
problem.
He believes he has proof that it is is GDM configuration issue and has provided
the following fix
Hey Tim,
I figured out a hack solution to the GDM prime issue. If you replace
/lib/systemd/system/gdm3.service
** Tags added: nvidia
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Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detected
Status in gnome-shell packag
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