Hi,
I removed the faulty i915 drivers from extra, you can download and test it here.
hw transcoding is working but performance is low on both videostation and plex but I don't think is related to the loader.
on ASRock j4205-ITX you have to unplug any monitor before using hw transcoding otherwise the system will reboot, this one might be due to /dev/dri permissions or the DP to hdmi coverter on this board.
reboot/shutdown is working properly again.
I recommend doing a clean install, formatting the hard drive before testing.
You can test disabling video outputs in the grub, for me it didn't install properly.
video=eDP:d video=DP-1:d video=HDMI-A-1:d video=HDMI-A-2:d
root@DS918:~# ls /dev/dri
card0 controlD64 renderD128
root@DS918:~# cat /sys/kernel/debug/dri/0/i915_frequency_info
PM IER=0x00000070 IMR=0xffffff8f ISR=0x00000000 IIR=0x00000000, MASK=0x00003fae
pm_intr_keep: 0x80000000
GT_PERF_STATUS: 0x006030cb
Render p-state ratio: 48
Render p-state VID: 203
Render p-state limit: 0
RPSTAT1: 0x12000030
RPMODECTL: 0x00000d92
RPINCLIMIT: 0x000027d8
RPDECLIMIT: 0x00005a00
RPNSWREQ: 800MHz
CAGF: 600MHz
RP CUR UP EI: 3192 (2660us)
RP CUR UP: 477 (397us)
RP PREV UP: 0 (0us)
Up threshold: 85%
RP CUR DOWN EI: 5109 (4257us)
RP CUR DOWN: 482 (401us)
RP PREV DOWN: 0 (0us)
Down threshold: 60%
Lowest (RPN) frequency: 100MHz
Nominal (RP1) frequency: 250MHz
Max non-overclocked (RP0) frequency: 800MHz
Max overclocked frequency: 800MHz
Current freq: 800 MHz
Actual freq: 600 MHz
Idle freq: 100 MHz
Min freq: 100 MHz
Boost freq: 800 MHz
Max freq: 800 MHz
efficient (RPe) frequency: 250 MHz
Current CD clock frequency: 624000 kHz
Max CD clock frequency: 624000 kHz
Max pixel clock frequency: 624000 kHz
[ 127.551937] ACPI: Power Button [PWRB]
[ 127.601681] Linux agpgart interface v0.103
[ 127.674041] [drm] Initialized drm 1.1.0 20060810
[ 127.809306] [drm] Memory usable by graphics device = 4096M
[ 127.882071] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 127.882075] [drm] Driver supports precise vblank timestamp query.
[ 127.884752] [drm] Finished loading i915/bxt_dmc_ver1_07.bin (v1.7)
[ 127.885302] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 128.859977] [drm] failed to retrieve link info, disabling eDP
[ 128.861274] [drm] GuC firmware load skipped
[ 128.865805] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 128.866518] acpi device:10: registered as cooling_device4
[ 128.866603] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input1
[ 128.866659] [drm] Initialized i915 1.6.0 20160919 for 0000:00:02.0 on minor 0
[ 128.882007] i915 0000:00:02.0: No connectors reported connected with modes
[ 128.882013] [drm] Cannot find any crtc or sizes - going 1024x768
[ 128.882929] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 128.938416] Btrfs loaded, crc32c=crc32c-intel