Public bug reported:
Context:
17.10 development packages, nvidia binary driver 375, modeset=1 for the nvidia
driver.
ubuntu desktop (gnome shell), fresh install
ThinkPad W520 in Nvidia Optimus bios mode.
Nvidia profile.
Result:
no external monitors are detected.
xrandr does not even list them as disconnected (normally it would list five
external disconnected monitors)
lsmod
shows that nvidia driver is loaded
and the modesetting is working at some level because there is no tearing on the
laptop panel
Note: modeset=1 is the only way to get flicker-free graphics on the laptop
panel. modeset=1 is not the default setting but it is highly desirable.
It works if lightdm is used which is why I have reported this against gdm3
My sessions in this configuration have mostly crashed after a few minutes with
a gdm3 fail whale message in syslog but nothing else looks interesting.
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- gdm3, hybrid nvidia in modeset, no external monitors detected
+ gdm3, hybrid nvidia with modeset=1, no external monitors detected
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https://bugs.launchpad.net/bugs/1716857
Title:
gdm3, hybrid nvidia with modeset=1, no external monitors detected
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