To successfully install Linux on ASUS’ P5Q-E motherboard the following _must_ be done (and will fail when you reset the BIOS)

1. Under MAIN / Storage Configuration, ‘configure
SATA as’ must be set to [AHCI]. This allowed the kernel to find my disks
and boot.

2. I experienced some weird USB problems while booting, and so under
ADVANCED / USB Configuration, I had to change ‘BIOS EHCI
Hand-Off’ to [Disabled].

3. For good luck, I also made sure ACPI 2.0 was enabled under power
saving. (off by default)

I have not heard from anyone getting Q-fan and/or EPU 6-engine (ASUS’ power saving / dynamic under-/overclocking software) to work under Linux.

Pity…