Test on Intel Tiger Lake platform with nvidia dGPU (N17S-G5 PCI\VEN_10DE&DEV_1C94).
Distribution: Ubuntu Codename: focal kernel: 5.6.0-1018-oem NV driver: 440.100 nvidia_drm modeset=1 gdm3: 3.34.1-1ubuntu1 xserver-xorg-core: 2:1.20.8-2ubuntu2.1 The device can detect external 4K/UHD monitor sucessfully by HDMI or DP. It seems the original issue is not able to reproduce on this machine. However, the modeset has to be enabled for https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1769857/comments/5, but it is disabled by default currently. ** Attachment added: "Attach my external monitors edid for reference" https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1716857/+attachment/5392513/+files/philips-edid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-430 in Ubuntu. https://bugs.launchpad.net/bugs/1716857 Title: nvidia-drm.modeset=1, gdm3 and optimus laptop results in no external monitors detected by Xorg To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1716857/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
