Hi, I think what I experience on my Thinkpad T460s might be the same bug. I do not have a dock but if I boot with an HDMI cable attached I get stuck after grub - at the screen with the Lenovo logo and a spinner.
This only happens, if I choose "Single Display" in the displays setting, using only the external screen attached via HDMI (i.e. the thinkpad screen is off, even though the lid is not closed). If instead I use "Join Displays", where both screens are on, I can boot with the HDMI cable attached. The problem appeared after upgrading from 19.10. I only have built-in graphics (Intel Corporation Skylake GT2 [HD Graphics 520]). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1876741 Title: Lenovo X1 boot crash with HDMI cable attached and laptop lid closed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1876741/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
