Comment 428 for bug 1734147

#424:
I've installed the following kernel images and headers:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14.9/linux-headers-4.14.9-041409_4.14.9-041409.201712251541_all.deb

linux-image-4.14.9-041409-generic_4.14.9-041409.201712251541_amd64.deb

Booted into Ubuntu 17.10 with the newly installed kernel and entered the BIOS once again.
Unfortunately, USB booting from UEFI is still broken. I'll get back to you as soon as I can find a fix.

#426:
I know this maybe a bit frustrating, but I'm almost certain we'll find a fix. Happy New Year and all the best to you!