Hi Maria, I don't think your issue is the same I got. Note that my problem happened with or without the dock, and I wasn't even reaching grub. That's the big difference here. If you lose the video after grub, than your problem is elsewhere, and my suggestion is to boot without "quiet splash" on the grup command line, so that you can see where the boot is stuck.
If it reaches the end of the boot process and it is just unable to start X (so GDM, LightDM or whatever), then your problem might be related to the drivers, maybe not blacklisting nouveau or things like these. Maybe as suggested elsewhere [1], you just need to uninstall the buggy xserver-xorg-video-intel package. What is more important here is that my problem got solved by setting the "Set Optimized" option in the BIOS to true. This solved a huge amount of problems, the last one I'm waiting to solve before closing this bug is to understand how to boot without a customized /etc/X11/xorg.conf. Hope this helps. [1] https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1879484 -- 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
