Hello everyone,
I have a Lenovo ThinkPad T480s laptop running Fedora 39 Kinoite. I would like to use it in a multi-display setup, so I am looking for a docking station. The laptop has a Thunderbolt 3 port. I have attached the details of my device at the end of the post.
People on Reddit are writing that "all Thunderbolt docking stations should work fine" and that's obviously not the case... I have this Dell Thunderbolt Dock (WD19TB) at home from work and the displays work when I plug it into the laptop but, for example, my mouse (connected via USB-A) doesn't work. When I connect it to the DELL laptop provided by the company, there are no problems at all.
Docking station requirements: Ethernet, 3x USB-A, 1x DisplayPort, 1x HDMI.
I have two 1080p displays: 75Hz and 165Hz. Obviously I'm not going to be playing any high-frame-rate games on this laptop, but even on a desktop it's sometimes nice to see a slightly higher refresh rate. So if it's possible, I'd like it to be able to display things above 60Hz...
I also have a Steam Deck OLED and would like to be able to use this dock with it.
I don't want to spend too much money on it. Do you have any experience in this area and can you help me choose?
I am from Poland if it helps in any way (maybe some brands are not available here).
LAPTOP DETAILS
Operating System: Fedora Linux 39
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.111.0
Qt Version: 5.15.11
Kernel Version: 6.6.6-200.fc39.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8550U CPU @ 1.80GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 20L8S0SA00
System Version: ThinkPad T480s
I also have a T480s and was looking to swap my WD19 for a WD19TB, as my dock doesn't support 4K@60Hz with my hardware. now I'm kinda stumped seeing that it wouldn't work...
can you confirm that you are running the latest firmware for both laptop and dock and that you're connecting the dock to the wider USB-C connector, the one that's farther away from the display?
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 :)
glad it worked out for you; I'm still looking for a solution for my problem that doesn't involve throwing everything out and buying Newest & Best.
do you use the LAN port on the dock by chance? and have you tried using the dock's USB 3 port for data transfer while everything's connected?
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...
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.
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.
here's information I've pieced together from multiple sources. it's kinda ancient hardware and not many people are into supporting it, so information found online is often outdated and unreliable.
so, T480s are basically the same hardware as previous T470 with i5-7200u Kabylake chips, same HD620 graphics and are limited to two data lanes for USB Type-C for DP-Alt connections; newer gens have three. this means you can attach a 4K/60Hz display directly to the USB port and that works ~~it uses like 8 Gbps of the port's 10 Gbps~~ (inaccurate, explained in the link at the bottom). but, it won't work through a dock as the additional USB ports on it (as well as audio and LAN) exceed the throughput of them lanes. there's a table somewhere that lists how many lanes and Gpbs you need for different resolutions/frequencies, I'll try to find it; I've just memorized it for my use case.
now, T480s has TB3 (the USB Type-C farther away from the display, with the extended connector) that can do 40 Gbps, but my WD19 dock doesn't, that's why I was looking to upgrade to said WD19TB.
when you connect a TB dock to a TB laptop, a buncha things should happen. first off making sure TB security is off or permissive (in BIOS setup), because TB does DMA and that's needed for security purposes. it's possible you'd have to turn off SecureBoot in order for that to work. finally, granting TB permissions in the OS (Gnome Shell has a TB entry in settings, don't know how Plasma handles that). basically, if the OS doesn't ask you to grant permissions upon connecting, TB isn't used, you're just using USB 3.1 speeds and those aren't enough.
most of this is just speculation on my part, as I don't have first hand experience with TB because I can't afford to go around buying dock after dock until I find one that works; you're in an awesome position if you can try out all those things for free!
now, as to your specific conundrum, not sure those 100+ Hz display modes are supported at all but you'd have to research this for yourself. as a minimal first step I suggest you get a USB Type-C to DP cable or adapter, that supports DP-Alt and try the monitor directly.
edit: here's a bunch of useful info: https://old.reddit.com/r/thinkpad/wiki/newdocks
upon rereading that link, it seems no dock will work for my use case as all T models up to T14 Gen1 have this shitty thunderbolt implementation that won't allow me to use the maximum bandwidth of the TB link, i.e. 4K@60Hz and run all ports and LAN at the same time at full speed and use only one cable..
sucks for me, but money saved not chasing that goal, I guess.
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.
Secure boot has already been disabled.
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...