Being duped here with a more specific bug, i.e 19.10 optimus hardware No login to ubuntu session possible with gdm, lightdm is ok
Maybe a few comments. This bug orig. suggests that one could actually login on optimus hardware with nvidia-drm.modeset=1 thru gdm. That was once the case, it no longer is in 19.10. The only session available is a wayland one because it falls back to Intel. As far as why users set nvidia-drm.modeset=1? I'd suggest the majority do so on optimus machines to be able to use nvidia without tearing. For the most part none have any interest in wayland even though wayland would solve tearing. Why?, because no (or virtually none) optimus machine has ever been able to use wayland & nvidia drivers. Not in the last couple of years, not now. While I don't have a desktop machine I do have a laptop with nvidia GPU only. In that case (19.04) with nvidia-drm.modeset=1 it presents and logs into a wayland session but llvmpipe only. It does work ok in a ubuntu session. Maybe I'll give it a try with 19.10 though on this machine there is no tearing so xorg is fine, currently any positives, if any, of wayland are outweighed by it's negatives. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-graphics-drivers-375 in Ubuntu. https://bugs.launchpad.net/bugs/1716857 Title: nvidia-drm.modeset=1 results in no monitors detected by Xorg Status in gdm3 package in Ubuntu: Opinion Status in nvidia-graphics-drivers-375 package in Ubuntu: Confirmed Status in nvidia-graphics-drivers-418 package in Ubuntu: Confirmed 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/gdm3/+bug/1716857/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
