Unfortunately, where I use the dock there is only a Wi-Fi connection. So I can't say anything about LAN speeds. I copied an 8GB file from the WD7500BPKX via the USB 3 port and the transfer was around 88 MiB/s. However, the transfer itself froze twice for a few seconds, which didn't happen when using the laptop's built-in USB port (speeds were about the same). So it's certainly not ideal...
OK, so today I was able to test the WD19TB dock again as I am back home. I changed the Thunderbolt security level to "No Security", connected the dock to the USB-C port further away from the display and... it seems to work fine.
I've got two screens connected: 1080p 75Hz (DP) and 1080p 165Hz (but only works at 144Hz via HDMI, so it's not a problem with the dock - same on PC with GTX1070); mouse and DAC via USB-A. I'm not sure what exactly caused the problems I had, but I guess it doesn't matter much now :D
Thanks for your help @dingdongitsabear@lemmy.ml :)
Thanks for the link! I hadn't come across this site before and it explains a lot.
For the Thunderbolt 3, I had the security level set to "User Authorization". I remember KDE Plasma showing me a popup asking for authorization for the Thunderbolt 3 port. I think I will just turn it off to make sure the docking station has the correct permissions.
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Secure boot has already been disabled. *removed externally hosted image*
When I get home, I'll write about what I've achieved with this DELL docking station when I've finished checking it all out. But it looks like that these problems may be caused by the Thunderbolt implementation used in the laptop, as you wrote...
Oh, that's interesting... I'm pretty sure I have the latest firmware installed on the laptop - I remember seeing some Lenovo updates in KDE Discover. I have vendor-directory and lvfs enabled there for firmware updates. When I open the BIOS, the ME firmware version is 11.8.94.4494. *removed externally hosted image*
However, now I'm not sure if I've tried both of the USB-C ports with THIS docking station. I certainly tried them with another one I had for a few weeks.
I've never done anything with the dock itself as it belongs to my company and I didn't want to risk breaking anything. But I have all this DELL software installed on my work laptop, so I guess it should update itself automatically? I will check all this after New Year's Eve as I am not at home at the moment and do not have access to the docking station.
Unfortunately, where I use the dock there is only a Wi-Fi connection. So I can't say anything about LAN speeds. I copied an 8GB file from the WD7500BPKX via the USB 3 port and the transfer was around 88 MiB/s. However, the transfer itself froze twice for a few seconds, which didn't happen when using the laptop's built-in USB port (speeds were about the same). So it's certainly not ideal...