I am now the proud owner of a Dell XPS13 Developer Edition. It ships with Ubuntu, and I have just installed Fedora 21.
For a “Linux” Laptop, linux support is actually pretty terrible, but you can get all the hardware functioning.
First thing, make sure you upgrade the BIOS past A02.
Broadcom wireless chipset
Apparently if you are lucky enough to pick up one of these in Europe it will ship with an Intel wireless chipset, but the US version has a Broadcom wireless card in it.
- Add the rpmfusion repository
- Install the required module and support software
# yum install kmod akmod kmod-wl kernel-devel
- Reboot your laptop
Updating the BIOS will get the sound to work, but the microphone will still not work. Updating to Kernel 4.0 will fix the problem, or waiting for Fedora 22. I found a backported 4.0 here.