edit: I realize after posting this it might not be relevant since you may be discussing the trackpad as used with Ubuntu.
As of 1 month ago, when I bought and then returned an XPS 15 due to the trackpad, there was no option for middle clicking and no option for navigating forward/back.
There are also horrific sensitivity issues with the trackpad that is extremely well documented in user complaints online - the cursor doesn't start moving until your finger moves about a millimeter on the trackpad, resulting in it "jumping" when you are moving very small distances with high cursor speed.
These are all software issues - I installed Synaptics and it fixed these problems, but introduced others. I spent over 20 hours testing and researching and messing with the registry to have a trackpad that works the same as most any other laptop with Windows 7 or Windows 8.1. I obviously didn't succeed, which is why I returned it.
To clarify, this is really a Windows 10 issue, and to some extent an Synaptics driver issue (even though it isn't officially supported by Dell).
Synaptics is terrible (at least from using them on ThinkPads for years). It loses settings, frequently. When using the trackpad, it uses several percent of CPU. That's idiotic.
For what it's worth, I had a bad time with the trackpad with a default 14.04 install. Switching to 14.10 fixed it, presumably due to the inclusion of newer drivers.
As of 1 month ago, when I bought and then returned an XPS 15 due to the trackpad, there was no option for middle clicking and no option for navigating forward/back.
There are also horrific sensitivity issues with the trackpad that is extremely well documented in user complaints online - the cursor doesn't start moving until your finger moves about a millimeter on the trackpad, resulting in it "jumping" when you are moving very small distances with high cursor speed.
These are all software issues - I installed Synaptics and it fixed these problems, but introduced others. I spent over 20 hours testing and researching and messing with the registry to have a trackpad that works the same as most any other laptop with Windows 7 or Windows 8.1. I obviously didn't succeed, which is why I returned it.
To clarify, this is really a Windows 10 issue, and to some extent an Synaptics driver issue (even though it isn't officially supported by Dell).