I'm having same issue running kernel 4.18.0-15 on an X1 extreme using thunderbolt 3 dock gen 2 connected from dock to monitor via HDMI cable.
Display settings detects monitor but monitor shows no signal. System is dual boot. Works on Windows, not on Ubuntu I am waiting to purchase a DisplayPort cable to see if that makes a difference but otherwise it doesn't work. Plugging HDMI directly into laptop (not dock) works. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763202 Title: Lenovo X1 Carbon 6th Gen. HDMI not working for external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763202/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
