It's all to do with which GPU the port is physically wired to. In most cases it's the Intel chipset wired to USB-C (and the laptop panel), so any monitor connected to that shows up as directly connected to the Intel GPU. In most cases on a dual GPU laptop, the HDMI port is wired to the discrete (Nvidia) GPU.
"In most cases" doesn't mean in all cases. You can get an idea by running: grep . /sys/class/drm/*/status to see which graphics "card" each port is wired to. Also, the frame copy is just a mutter/gnome-shell design limitation. It's possible other desktop environments can composite on each GPU equally without copying, and that's something GNOME aspires to supporting in future. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/2107684 Title: 25.04 boots up to a black screen, both built-in and external monitors Status in mesa package in Ubuntu: Invalid Status in mutter package in Ubuntu: Invalid Status in nvidia-graphics-drivers-570 package in Ubuntu: Invalid Bug description: Now I have to boot up through recovery step and select "resume" in the recovery mode to boot up to the full system. --- ProblemType: Bug ApportVersion: 2.32.0-0ubuntu5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 25.04 InstallationDate: Installed on 2021-10-20 (1286 days ago) InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012) NonfreeKernelModules: nvidia_modeset nvidia Package: mutter 48.1-1ubuntu3 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 6.14.0-15.15-generic 6.14.0 Tags: plucky wayland-session Uname: Linux 6.14.0-15-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin lxd microk8s ollama plugdev root sambashare sudo syslog _MarkForUpload: True --- ProblemType: Bug ApportVersion: 2.32.0-0ubuntu5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 25.04 InstallationDate: Installed on 2021-10-20 (1287 days ago) InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012) NonfreeKernelModules: nvidia_modeset nvidia Package: gnome-shell 48.0-1ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 6.14.0-15.15-generic 6.14.0 RelatedPackageVersions: mutter-common 48.1-1ubuntu3 Tags: plucky wayland-session Uname: Linux 6.14.0-15-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin lxd microk8s ollama plugdev root sambashare sudo syslog _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/2107684/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
