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 and laptop panel, with prime sync on and no flickering, running 'ubuntu on xorg' *** FOR THE FIRST TIME EVER *** on my thinkpad W520 which is old but is a genuine Optimus laptop with Quadro graphics on the nvidia 387.34 binary driver in Optimus mode. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1716857 Title: gdm3, hybrid nvidia with modeset=1, no external monitors detected Status in gnome-shell package in Ubuntu: New Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1716857/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
