grml micvol=number Set mixer volume of microphone to level $number (default: 0)
grml pnpbios=off No PnP Bios initialization
grml acpi=off Disable ACPI Bios completely
-grml nousb2 Disable initialization of USB 2.x controller(s)
-grml nousb Disable initialization of USB in booting sequence
grml nofirewire Disable initialization of firewire devices in booting sequence
grml pci=irqmask=0x0e98 Try this, if PS/2 mouse doesn't work *)
grml pci=bios Workaround for bad PCI controllers