I had this issue with ThinkPad X1 Extreme 3rd gen with Ubuntu 20.04 and Thunderbolt 3 Dock gen 2. It got resolved when I plugged second power adapter into the laptop directly. I have 135W adapters for both laptop and the dock and thunderbolt cable for connecting them. There is different type of the same dock called Thunderbold 3 Workstation Dock and the difference is in cables and adapter only. It has stronger adapters and the cable for connecting laptop and the dock has additional power wire in it. I contacted Lenovo support in order to replace them.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1827042 Title: ThunderBolt "flaps" on laptop with 32G RAM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1827042/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
