Thanks for trying,  not so easy to debug on a live session. Lets see if
we can reproduce it locally.

I'm hoping you are running Ubuntu locally (which version?), if so could you try 
to see if you can reproduce the problem using a mainline kernel build of 4.13 - 
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.3/ seems like a good first 
try)
https://wiki.ubuntu.com/Kernel/MainlineBuilds

This would just install the kernel and should make it easier to bisect
the issue.

If v4.13.3 doesn't cause the issue, try v4.13-rc7, otherwise we can be
relatively sure it's not a kernel issue (or at least not just a kernel
issue)

If v4.13.3 doe cause the issue, try v4.14-rc1 to see if it's fixed in a newer 
release. 
Then try v4.12.14 to see if it was present in 4.12, if it wasn't we want to try 
maybe v4.13-rc3/.
If it is present in v4.12.14 then we want to try maybe v4.12-rc5/.

Ideally we'd work it down to exactly where it was introduced - and then
maybe do Git bisects.

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https://bugs.launchpad.net/bugs/1718936

Title:
  Can't boot Artful 17.10 live images on XPS 15 (9560)

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