Ubuntu
gdm3 package

  1. Bug #1958488
  2. Comment #3

Comment 3 for bug 1958488

Revision history for this message
Daniel van Vugt (vanvugt) wrote : Re: [nvidia][xorg] display hangs on boot LOGO

Note that gnome-shell (which also renders the login screen for gdm) always uses the primary iGPU for rendering regardless of whether some monitors are plugged into a dGPU port. The latter get their framebuffers rendered on the iGPU but copied to the dGPU for output on every frame. This makes sense for the common dual-GPU case of a laptop where you want to be able to connect an external monitor to any port (even if that port is wired to dGPU) while still using the iGPU for efficiency by default.

But enough from me. You should propose any patches to https://gitlab.gnome.org/GNOME/gdm/ (or to https://gitlab.gnome.org/GNOME/mutter) to get more authoritative information from the developers.