I started thinking this wasn't a kernel issue since I wasn't getting any display from a cold boot...
I changed grub configuration to show menu and remove quiet splash from Linux CMD LINE and it turns out that when I press the power button the first thing I see is the Grub menu and no keyboard input are working, arrows or enter key when USB-C is plugged in but when I unplugged the USB-Type C monitor, I can press enter during the Grub menu and it boots. So I believe the issue is with Grub hanging while USB-C monitor plugged in. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1866852 Title: System Display black screen on reboot or after a clean shutdown with USB-C Dock Monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1866852/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
