Glenn Becker wrote:
Hi -
I am following along in the Handbook in my first attempt to compile a
custom kernel ... and once again confronting the fact that I really know
beans about hardware. So once I get to the "device" lines in my edited
copy of the GENERIC config file I start to get a little bit lost.
I know enough to look through /var/run/dmesg.boot, and many devices make
themselves obvious (a DVD-ROM drive is a DVD-ROM drive is a ...) but how
do I identify my motherboard, for example, so I know which lines to
comment out (or conversely, leave in) in the kernel config file?
There are a couple places that have good comments on what each device
is. GENERIC kernel itself is very descriptive, for example for your
keyboard:
--- snip ---
# atkbdc0 controls both the keyboard and the PS/2 mouse
device atkbdc # AT keyboard controller
device atkbd # AT keyboard
device psm # PS/2 mouse
--- end sip ---
Also read over NOTES it has a lot of architecture specific notes. You
should also read over /usr/src/sys/conf/NOTES for even more kernel options.
If there is a good overall guide to info like this, I'd appreciate it if
someone would point it out to me. :^) I also get lost in the alphabet
soup of ATA, PCI, SCSI and so on.
You will need to do some reading into these devices in some cases if you
are planing of customizing the kernel.
dmesg will show you everything the system detects, even if it doesn't
have a driver. It is upto you from that point to figure out what
device driver (if there is one) your kernel is missing for the hardware
and add it.
Thanks in advance for any guidance. I didn't want to attach my whole
dmesg.boot file but will do so if that will help.
Best,
Glenn
Oh and another piece of advice, read up in the handbook on recovering
from a kernel that will not boot. Important to know when doing
recompiles :)
Cheers,
Jeff
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