Has anyone else a problem using the Thunderbolt interface on NUC8i5? I have the NUC8i5BEH and was working with a dual monitor setup under Ubuntu 18.04.2. One connected via HDMI, the other one via Thunderbolt/USB-C. After having worked for weeks, for some days I have problems connecting the Thunderbolt monitor. Some days ago, the display was simply not found from Ubuntu. After having switched monitors and cables, it somehow worked again. But today, the same problem occurred, and until now I had no chance to reconnected the second display.
In the Ubuntu settings Devices > Thunderbolt, it simply says "No Thunderbolt support":
More importantly, lspci does not list the Thunderbolt device:
Has anyone else similar problems? Or should I be worried about a broken device? I am running Linux 5.0.0-32-generic #34~18.04.2-Ubuntu.
Thank you for your suggestions! I have the latest BIOS version running, so this shouldn't be a problem.
Funny thing: booting an Ubuntu 19.10 Live image re-enabled the Thunderbolt interface. In the live settings, I could activate the disabled monitor. Rebooted into the installed 18.04, and everything worked again. So if anyone else has the same problem, this might be a possible way out.