I was actually able to figure this out on my own. Just after I posted, I remembered that my work uses these adapters to connect our work PC's to monitors. I connected my laptop to that adapter and I was able to get it working at 30Hz with two 4k monitors and the built-in 1080p display on Ubuntu with no issues. So there is the answer for anyone else wondering: The laptop appears to be perfectly capable of running 4k+4k+1080p, so I assume there should be no issue with either that combination or 1440p+1440p+1080p.
Hello, I have an XPS 13 9365 and I want to use it with some external monitors. My ideal setup would be the laptop plugs into a USB-C dock, which will connect to two monitors via HDMI and/or DisplayPort. The laptop has a 1080p and both monitors are 1440p and I would like to use all 3 displays at the same time. My question is, will the laptop be able to run both monitors at 1440p? I have two cheap USB-C hubs and when I tried them earlier today, one monitor ran at 1440p and the other ran at 1080p. I tried to change the resolution to 1440p but Ubuntu gave me an error about not being able to run one of them at 1440p (I don't remember the exact error message unfortunately). I figured it might be an issue with one of the hubs, but I want to make sure the hardware in the laptop is capable of driving the built-in 1080p display at the same time as two external 1440p displays before I spend a lot of money on a Dell docking station. I don't care if they are 30Hz or 60Hz I just want 1440p since it looks fuzzy when upscaled from 1080p. Thanks
XPS 13 9365 with 2 1440p monitors