Comment # 4 on bug 1215436 from Stuart Rogers

Tried that loglevel=7 without quiet and acpi-noirq but all I get is a load of
messages flashing past on screen but too fast to see clearly. Looks from memory
the same as when I do it without quiet and acpi. Then it just reboots.

On next good boot with acpi=noirq I can see no messages anywhere relating to
this fail boot, nothing in dmesg or journal relating to the fail.

Where would messages be expected to be saved if any?