https://bugs.freedesktop.org/show_bug.cgi?id=110830 --- Comment #10 from Marcin Zajaczkowski --- (In reply to Ilia Mirkin from comment #9) > (In reply to Marcin Zajaczkowski from comment #7) > > > Providers: number : 2 > > > Provider 0: id: 0x6b cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 3 outputs: 3 associated providers: 1 name:modesetting > > > Provider 1: id: 0x45 cap: 0x2, Sink Output crtcs: 4 outputs: 2 associated providers: 1 name:modesetting > > > > Hmm, why there are 3 and 4 outputs associated to them? Is it possible that > > DP output is accessible with the Intel card only (I don't have a connector > > right here to test it organoleptically)? > > "crtcs: 4; outputs: 2". All modern NVIDIA GPU's have 4 CRTC's. You can see > the full list of outputs with that grep command you ran. > > You can now slave the nvidia GPU's outputs to the primary (intel) GPU: > > xrandr --setprovideroutputsource 1 0 > > which should allow you to drive on your NVIDIA GPU's outputs by configuring > them in xrandr. In lxqt (with Openbox) after that command and "xrandr --output HDMI-1-2 --auto --right-of eDP-1" the external monitor is turned on and I see a mouse cursor there, but no window is rendered. In Gnome 3 (with xorg) the external monitor is detected automatically, but the effect is the same - black screen with a mouse cursor. Can it be related to the fact that NVidia providers reports only "Sink Output", but not offloading? > This should also be possible with a Wayland compositor, however the > specifics will vary by compositor. Xwayland has no ability to control screen > setup. In Wayland the external monitor works out-of-box in Gnome 3. However, I have problem with bringing it to live with Xorg server (some tools I use don't like Wayland). Is it possible to force LXQT or Gnome 3 (on xorg) to render also on the external screen? I've read about some issues with Windows Manager and "offloading", but though it only applies to OpenGL-based output with PRIME=1. -- You are receiving this mail because: You are the assignee for the bug.