[xubuntu-users] Installing 15.10 as dual boot with Windows 10 on Dell XPS 8900

[Peter Flynn]

I have a new Dell XPS 8900 which has had our corporate Windows 10 image
installed. I want to dual boot with Xubuntu 15.10 64-bit which I burnt
to a USB stick with unetbootin (which I have used to install a different
machine, so I know the USB stick works OK).

The BIOS is unlocked, so when I power up I can hit F12 during the Dell
logo, and enter the boot menu. I pick USB from the Legacy menu, having
seen a lot of sites warning against trying to dual-boot install via the
UEFI menu.

It's sloooooooooooooooooooow. I eventually get the Ubuntu splash screen,
then the language-selector OK, and after several more minutes I get the
window confirming enough disk space and an Internet connection. I left
"Download updates" UNchecked, but I checked the option to install
third-party drivers. And clicked Continue.

Then it just sits there. Eventually I gave up and held down the power
button for long enough to cause an interrupt. I got a lot of console
messages showing it trying to do various things with the colord driver
and failing, causing successive failures in other bits an pieces it was
obviously trying to load.

1. What is it actually trying to do behind the scenes of a GUI install?

2. Is there a way to force it to do an old-style console install?

3. Or should I ignore the warning about UEFI (that it won't see the dual
boot nature, and will lose either Windows or Ubuntu or both, and maybe
brick the system)?

4. Is it worth it? I can get away without Windows, as I have a Crossover
license so I can run Office on the 2-3 occasions in a year that I need to.

5. Is the colord problem related to screen rez or the fact that it's a
HDMI connection? Is there an updated way to install on these machines?

///Peter