Wow I'm not alone! Happens with the same hardware. Dell 5520 with a TB16 dock. After login it now goes through up to 6 cycles of blank to normal screens before it stabilizes after 30-60 seconds. It's connected to a Dell 4k monitor via displayport. The TB16 side is using a normal DP connector and the monitor side is using a mDP connector. I mention this because previously I had the cable connected the other way (mDP connector on TB16) and it would flicker a little less (up to 4 times max).
I wonder if because of the change in behavior when swapping the cable ends if this is an issue of the dock not supplying enough power initially? Just a thought - I have no evidence to support this. It may also be worth mentioning that I'm driving the monitor at 4k/60Hz. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1793965 Title: Firmware update daemon resets displays connected to Dell TB16 dock soon after every first login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fwupd/+bug/1793965/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
