Hi, I am having problems with connecting my laptop to an Apple Thunderbolt Display [1]. The P52 has two Thunderbolt over USB-C ports and I am connecting it to the Apple Display using an Apple adapter. A colleague has validated that the display works with a Macbook using a similar adapter. I am using the 'Discrete Graphics' setting and using the proprietary nvidia driver version 410.93. I have checked the following: - in the BIOS Thunderbolt assist is disabled ( should not be necessary _and_ it is reported to brick the laptop [2] ) - in the BIOS I have set the security level to 'none' - in Gnome the 'Thunderbolt' panel displays 'Thunderbolt could not be detected' - xrandr -q does not return any connected displays $ xrandr -q Screen 0: minimum 8 x 8, current 3840 x 2160, maximum 32767 x 32767 DP-0 disconnected (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis) HDMI-0 disconnected (normal left inverted right x axis y axis) DP-2 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 3840x2160 60.00*+ DP-3 disconnected (normal left inverted right x axis y axis) DP-4 disconnected (normal left inverted right x axis y axis) - tbtadm devices returns no entries. However, tbtadm topology does recognize the host $ tbtadm topology Controller 0 └─ Details: ├─ Name: P52, Lenovo └─ Security level: SL0 (none) In case it helps, here's the lspci -vt output $ sudo lspci -vt -[0000:00]-+-00.0 Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers +-01.0-[01]--+-00.0 NVIDIA Corporation GP107GLM [Quadro P2000 Mobile] | \-00.1 NVIDIA Corporation GP107GL High Definition Audio Controller +-04.0 Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem +-08.0 Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model +-12.0 Intel Corporation Cannon Lake PCH Thermal Controller +-14.0 Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller +-14.2 Intel Corporation Cannon Lake PCH Shared SRAM +-14.3 Intel Corporation Wireless-AC 9560 [Jefferson Peak] +-15.0 Intel Corporation Device a368 +-16.0 Intel Corporation Cannon Lake PCH HECI Controller +-16.3 Intel Corporation Device a363 +-1b.0-[02]-- +-1b.4-[03]----00.0 Intel Corporation Device 7360 +-1c.0-[04-6e]----00.0-[05-6e]--+-00.0-[06]----00.0 Intel Corporation JHL7540 Thunderbolt 3 NHI [Titan Ridge 4C 2018] | +-01.0-[07-39]-- | +-02.0-[3a]----00.0 Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 4C 2018] | \-04.0-[3b-6e]-- +-1c.7-[70]----00.0 Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader +-1d.0-[71]----00.0 Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981 +-1e.0 Intel Corporation Device a328 +-1f.0 Intel Corporation Device a30e +-1f.3 Intel Corporation Cannon Lake PCH cAVS +-1f.4 Intel Corporation Cannon Lake PCH SMBus Controller +-1f.5 Intel Corporation Cannon Lake PCH SPI Controller \-1f.6 Intel Corporation Ethernet Connection (7) I219-LM At this point I have no idea where to go next. Thunderbolt support should be there (both hardware and software) . All of the above listings have been taken with the display connected. Any ideas on how to debug or fix this would be appreciated. Thanks! Robert [1]: https://en.wikipedia.org/wiki/Apple_Thunderbolt_Display [2]: https://forums.lenovo.com/t5/ThinkPad-P-and-W-Series-Mobile/Lenovo-P52-brick... -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org