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Latitude 7430, Dockingstation and Linux

3 years ago by sesh to c/linux

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My Laptop at work is Latitude 7430 and i'd like to switch from Windows to Linux (any distro is fine). Now i have tried Ubuntu, openSUSE and Manjaro to no avail, due to the insane lag on the integrated screen. When running on the Live ISO over USB everything seems to be working fine, the screens attached to the docking station are recognized properly and the integrated screen is not lagging. As soon as i install to disk and reboot into the new system, the issues start: laggy integrated screen (it's updating in the background but the output seems to be 2-3 seconds behind somehow) & screens attached to the docking station only become available after replugging. Now i thought maybe it's a x11 issue and tried wayland, no difference. Same goes for switching from KDE to GNOME.

Anyone got a working Latitude 7430 + docking station + Linux setup or got some tips on trouble shooting?

Sir_mittens2 4 points 3 years ago

does the docking station happen to have a display link chip in it? they give a lot of problems in my experience. it requires a separate driver

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sesh 1 point 3 years ago

Thanks for your input! No the WD22TB4 Dock doesn't have a display link chip. The 2 external screens work just fine after repluggin the laptop, however the internal laptop screen is still lagging.

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Atemu 2 points 3 years ago

Which GPU and driver?

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sesh 1 point 3 years ago

Mesa, didn't install anything and just kept every distro i tried stock

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PlexSheep 2 points 3 years ago

I have a Dell dock that I use with my Framework laptop in private, and my Dell laptop for working in Homeoffice, the Framework runs Fedora, the Dell sadly windows, the dock works perfectly fine regardless.

I'm not sure on the exact models: Iirc the dock is a WD22TB4.

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sesh 1 point 3 years ago

Thanks for your reply! I have the same dock, do you have to replug your framework after boot for it to detect the screens at all?

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backhdlp 1 point 3 years ago

You might be missing a driver that's in the ISO. Dell offers driver downloads for Ubuntu 20.04 LTS near the bottom of the product page.

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