Hello, to install kernel in https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/ You need to download
linux-headers-5.11.0-051100drmtip20210217-generic_5.11.0-051100drmtip20210217.202102170205_amd64.deb linux-headers-5.11.0-051100drmtip20210217_5.11.0-051100drmtip20210217.202102170205_all.deb linux-image-unsigned-5.11.0-051100drmtip20210217-generic_5.11.0-051100drmtip20210217.202102170205_amd64.deb linux-modules-5.11.0-051100drmtip20210217-generic_5.11.0-051100drmtip20210217.202102170205_amd64.deb put them to the same folder, under the folder execute: $ sudo dpkg -i *.deb $ sudo reboot The system will reboot, after reboot, please use $ uname -r to check kernel version. It should be like 5.11.0-xxxxx, then try to use HDMI again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1914670 Title: No HDMI detection To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1914670/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs