Quick Start Guide

If this fails, proceed as above, but choose Safe Settings instead. This option disables
ACPI and DMA support. Most hardware will boot with this option.
If both of these options fail, use the boot options prompt to pass any additional pa-
rameters needed to support this type of hardware to the installation kernel. For more
information about the parameters available as boot options, refer to the kernel doc-
umentation located in /usr/src/linux/Documentation/kernel-parameters.txt.
TIP: Obtaining Kernel Documentation
Install the kernel-source package to view the kernel documentation.
There are various other ACPI-related kernel parameters that can be entered at the
boot prompt prior to booting for installation:
acpi=off
This parameter disables the complete ACPI subsystem on your computer. This
may be useful if your computer cannot handle ACPI at all or if you think ACPI in
your computer causes trouble.
acpi=force
Always enable ACPI even if your computer has an old BIOS dated before the year
2000. This parameter also enables ACPI if it is set in addition to acpi=off.
acpi=noirq
Do not use ACPI for IRQ routing.
acpi=ht
Run only enough ACPI to enable hyper-threading.
acpi=strict
Be less tolerant of platforms that are not strictly ACPI specication compliant.
pci=noacpi
Disable PCI IRQ routing of the new ACPI system.
pnpacpi=off
This option is for serial or parallel problems when your BIOS setup contains wrong
interrupts or ports.
notsc
Disable the time stamp counter. This option can be used to work around timing
problems on your systems. It is a recent feature, if you see regressions on your
machine, especially time related or even total hangs, this option is worth a try.
nohz=off
Disable the nohz feature. If your machine hangs, this option may help. Otherwise
it is of no use.
Common Problems and Their Solutions 135