Comment 19 for bug 1728238

@jsalisbury This does indeed fix the issue:

~$ sudo update-initramfs -u -v -k all|grep kbl
Adding firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin
Adding firmware /lib/firmware/i915/kbl_huc_ver02_00_1810.bin
/usr/sbin/iucode_tool: system has processor(s) with signature 0x000806e9
/usr/sbin/iucode_tool: Writing selected microcodes to: /var/tmp/mkinitramfs-EFW_1VBI8FyxJM
/usr/share/initramfs-tools/scripts/panic/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-top/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-block/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-top/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-premount/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-premount/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-bottom/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-bottom/ORDER ignored: not executable
Adding firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin
Adding firmware /lib/firmware/i915/kbl_guc_ver9_14.bin
Adding firmware /lib/firmware/i915/kbl_huc_ver02_00_1810.bin
/usr/sbin/iucode_tool: system has processor(s) with signature 0x000806e9
/usr/sbin/iucode_tool: Writing selected microcodes to: /var/tmp/mkinitramfs-EFW_LmLiZccZZr
/usr/share/initramfs-tools/scripts/panic/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-top/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-block/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-top/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-premount/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-premount/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-bottom/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-bottom/ORDER ignored: not executable

~$ uname -a
Linux 4.15.0-20-generic #21~lp1728238 SMP Mon May 7 16:50:25 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

~$ sudo cat /sys/kernel/debug/dri/0/i915_guc_load_status
GuC firmware: i915/kbl_guc_ver9_14.bin
 status: fetch SUCCESS, load SUCCESS
 version: wanted 9.14, found 9.14
 header: offset 0, size 128
 uCode: offset 128, size 142272
 RSA: offset 142400, size 256

GuC status 0x800330ed:
 Bootrom status = 0x76
 uKernel status = 0x30
 MIA Core status = 0x3

Scratch registers:
  0: 0xf0000000
  1: 0x0
  2: 0x0
  3: 0x5f5e100
  4: 0x600
  5: 0xcdfd3
  6: 0x0
  7: 0x8
  8: 0x3
  9: 0x70240
 10: 0x0
 11: 0x0
 12: 0x0
 13: 0x0
 14: 0x0
 15: 0x0

~$ sudo cat /sys/kernel/debug/dri/0/i915_huc_load_status
HuC firmware: i915/kbl_huc_ver02_00_1810.bin
 status: fetch SUCCESS, load SUCCESS
 version: wanted 2.0, found 2.0
 header: offset 0, size 128
 uCode: offset 128, size 218304
 RSA: offset 218432, size 256

HuC status 0x00006080: