I’m using Manjaro (next to Windows 10) on my Thinkpad X280. In Windows 10 the Thunderbolt 3 Dock (40AC) and the Thinkpad work flawlessly. In Manjaro and without the Thunderbolt 3 dock connected everything works just fine as well. When I connect the dock while I’m already logged in into Manjaro, the dock is recognized and (after I told the OS to trust the device) I can use two external monitors, external keyboard, mouse and the ethernet port on the dock.
But when I boot with the dock already connected, the following happens:
- the Thinkpad boots and I see the red “Lenovo”-splash screen
- the GRUB loader shows me the options to boot Manjaro or Windows 10
- selecting Windows 10 boots into Windows and everything works
- selecting Manjaro all screens (two external and the internal LCD) turn black and stay like that
- set the "Security level" under Thunderbolt settings in the BIOS, and set it to "Secure"
- set the "Security level" under Thunderbolt settings in the BIOS, and set it to "none / Insecure"
- enable the "Support in pre boot environment" (something called ACL or similar)
- updated the Thinkpad via “Lenovo Vantage” in Windows: Everything updated fine (BIOS, etc.) except the “Thunderbolt Firmware Update Utility” (N20TF21W)
My problem is described here as well (Ubuntu): https://bugs.launchpad.net/ubuntu/+sour ... ug/1697395
and here it says, that the issue is solved with kernel 4.14: https://github.com/intel/thunderbolt-so ... -327865033 I use kernel “Linux 5.8.16-2-MANJARO“ so this should already be fixed in my kernel version I assume.
Anyone any ideas how to get the dock working when attached while booting Manjaro?