Comment 3 for bug 1697882

Doug McMahon (mc3man) wrote :

Just to reiterate, scorecard here on i7-4700MQ, GeForce GT 755M, nvidia-375.66 drivers, prime profile of nvidia selected.

gnome-wayland session, gdm, KMS = total fail
gnome-wayland session. gdm = total fail

default (ubuntu) session, gdm KMS, = all good, happy days, PRIME Synchronization = yes
default (ubuntu) session, lightdm, KMS = all good, even happier days, PRIME Synchronization = yes

So just the opposite of what is stated here & elsewhere, i.e. Will Cooke -

"While Wayland requires KMS (kernel mode setting) to be enabled, there is
a current limitation in the nvidia driver that causes X11 sessions to
crash with KMS. For this reason I am keeping KMS disabled by default, at
least for now. This is not going to be fixed anytime soon, as it
requires major changes in the driver.

Users who want to try Wayland with nvidia will have to set modeset=1 in
/etc/modprobe.d/nvidia-graphics-drivers.conf, and then update the
initramfs.

When KMS is enabled, GDM will start, but entering the default session
will fail with no error that is visible to the user. Ideally, I think we
would check if KMS is enabled with nvidia, and either show only the
Wayland sessions or maybe simply
default to the Wayland session."