this board is on the /tasks/ page in libreboot.org
i've advised this person to try adding a config under resources/coreboot/
I have created a libreboot config for this board and built it with git lbmk. Actually the system is able to boot with this config. I have tested grub only and seabios with grub so far. Booting from usb device works as well. internal hdmi is also working. The cpu fan switches to a lower speed after startup.
Today, 7 September 2021 on libreboot IRC:
09:46 <ollonois1> Hi, I did some further testing on the P5Q-EM board. One thing I recognized was that the power off option in grub is not working. Unknown opcode 0x70 acpi shutdown failed.
09:46 <ollonois1> the other thing is, that I can install trisquel but parabola switched the screen black after the kernel is loading. Don't know if this is a libreboot related issue or something wrong with image nut on my other coreboot system it boots up well.
I'm now following up about this on IRC.
I used the following config
I used Seabios + Grub
Hardware beside the P5QL-EM:
PCIe X16 NVME SSD adapter in the PCIe graphic card slot (nvme)
NVIDIA GT710 in the PCIe X1 Slot (gt710)
onboard intel graphics -> works with both trisquel and paraola (vga+dvi+hdmi)
onboard intel + nvme -> screen stays black on hdmi + dvi , vga is working
nvme + gt710 -> bootup with trisquel net install image -> works, parabola screen turns black, but there is still a signal.
In all configurations vga output is shifted to the left ( 1 character is missing)
also Seabios is not able to boot from the nvme -> Read Error
I flashed a coreboot rom and here I was able to boot from the nvme. Only vga output was working with the shifting issue.