This section covers basic installation troubleshooting, such as common problems people have reported.
Check the Hardware Notes (http://www.freebsd.org/releases/index.html)
document for the version of FreeBSD to make sure the hardware is
supported. If the hardware is supported and lock-ups or other
problems occur, build a custom kernel using the instructions in
Chapter8, Configuring the FreeBSD Kernel to add support for devices which
are not present in the
GENERIC kernel. The
default kernel assumes that most hardware devices are in their
factory default configuration in terms of
IRQs, I/O addresses, and
DMA channels. If the hardware has been
reconfigured, a custom kernel configuration file can tell FreeBSD
where to find things.
Some installation problems can be avoided or alleviated by updating the firmware on various hardware components, most notably the motherboard. Motherboard firmware is usually referred to as the BIOS. Most motherboard and computer manufacturers have a website for upgrades and upgrade information.
Manufacturers generally advise against upgrading the motherboard BIOS unless there is a good reason for doing so, like a critical update. The upgrade process can go wrong, leaving the BIOS incomplete and the computer inoperative.
If the system hangs while probing hardware during boot, or
it behaves strangely during install, ACPI may
be the culprit. FreeBSD makes extensive use of the system
ACPI service on the i386,
amd64, and ia64 platforms to aid in system configuration
if it is detected during boot. Unfortunately, some bugs still
exist in both the ACPI driver and within
system motherboards and BIOS firmware.
ACPI can be disabled by setting the
hint.acpi.0.disabled hint in the third stage
This is reset each time the system is booted, so it is
necessary to add
information about the boot loader can be found in Section12.1, “Synopsis”.