So, I just upgraded to 17.04 with Xorg 1.19.3 and nvidia 375.xx drivers. By default, Ubuntu installed a modprobe.d file to set drm modeset = 0 for the nvidia kernel module and that seem to prevent Prime Synchronization from working.
I tried to change the modeset to 1 so I could finally try the synchronization configuration, but that froze the system hard as long as lightdm booted. I installed gnome with gdm3 and I could get to gdm3 and try to login to gnome with no avail. But after a few tries (without changing anything) it just logged in, but prime synchronization was off for both the laptop screen as my TV. I did the "modprobe -v nvidia-drm" to check the modeset and it was 1, but whenever I tried to set the Prime Synchronization via xrandr, the screen went black for a sec and came back, but xrandr --verbose still displayed Prime Synchronization off. Why is that cat /etc/modprobe.d/nvidia-graphics-drivers.conf with the "options nvidia_375_drm modeset=0"? Why does changing it to 1 freeze the whole system thereafter? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1674304 Title: PRIME synchronization not working with xserver-1.19.x To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1674304/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
