This command enables the built-in kernel deadlock detector. This command can be used to debug hard kernel lockups. By executing periodic NMI (Non Maskable Interrupt) interrupts, the kernel can monitor whether any CPU has locked up and print out debugging messages as needed.
noapic
This command tells the kernel not to use the APIC chip. It may be helpful for some motherboards with a bad APIC (such as the Abit BP6) or with a buggy BIOS.
noathlon
This command tells the kernel to disable Athlon optimizations. This command may be helpful where Athlon optimizations are found not to work on certain chipsets.
noht
This command disables hyperthreading (when available in SMP systems).
nomce
This command disables self-diagnosis checks performed on the CPU. The kernel enables selfdiagnosis on the CPU by default (called Machine Check Exception). On some older Compaq machines, this check is run too often and may need to be disabled.
nopass
This command disables the passing of keyboard and mouse information to stage 2 of the installation program. It can be used to test keyboard and mouse configuration screens during stage 2 of the installation program when performing a network installation.
nopcmcia
This command ignores any PCMCIA controllers in system.
noprobe
This command disables hardware detection and instead prompts the user for hardware information.
noshell
This command disables shell access on virtual console 2 during an installation.
nousb
This command disables the loading of USB support during the installation. If the installation program tends to hang early in the process, this command may be helpful.
nousbstorage
This command disables the loading of the usbstorage module in the installation program's loader. It may help with device ordering on SCSI systems.