Created attachment 753389 [details]
y2logs .tgz

[This was my first ever attempt to GPT partition and install to a UEFI mode
PC.]

I tried twice with 42.3, spending well over an hour each time, then TW20171214,
which completed installation after only briefly driving CPU to 100% with
y2start, and booted as expected. Attachment is from first 42.3 try.

To reproduce:
1-fully GPT partition wiped target HD in advance
2-format all Linux native partitions in advance
3-boot netboot CD on new Kaby Lake PC configured to boot UEFI
4-proceed through "Custom Partitioning (for experts)" specifying existing but
unformatted GPT /dev/sda1 ESP partition be formatted FAT32 for mount on
/boot/esr
5-proceed through package selection
6-configure passwords
7-select booting from installation settings screen
8-select kernel parameters tab

Actual behavior:
1-busy indicator stays on indefinitely
2-mouse clicks produce no response
3-top on tty2 shows 200% CPU from y2start

Expected behavior:
1-able to proceed with and complete installation