On Wed, 12 Nov 2008, Andriy Gapon wrote:
on 05/11/2008 17:24 Andriy Gapon said the following:
[...]
I have a legacy-free system (no PS/2 ports, only USB) and I wanted to
try a kernel without atkbd and psm (with ums, ukbd, kbdmux), but was
bitten hard when I made a mistake and kernel could not find/mount root
filesystem.
So I stuck at mountroot prompt without a keyboard to enter anything.
This was repeatable about 10 times after which I resorted to live cd.
Since then I put back atkbdc into my kernel. I guess BIOS or USB
hardware emulate AT or PS/2 keyboard, so the USB keyboard works before
the driver attaches. I guess I need such emulation e.g. for loader or
boot0 configuration. But I guess I don't have to have atkbd driver in
kernel.
This turned out not to be a complete solution as it seems that there are
some quirks about legacy USB here, sometimes keyboard stops working even
at loader prompt (this is described in a different thread).
ukbd attachment still puzzles me a lot.
I look at some older dmesg, e.g. this 7.0-RELEASE one:
http://www.mavetju.org/mail/view_message.php?list=freebsd-usb&id=2709973
and see that ukbd attaches along with ums before mountroot.
I look at newer dmesg and I see that ums attaches at about the same time
as before but ukbd consistently attaches after mountroot.
I wonder what might cause such behavior and how to fix it.
I definitely would like to see ukbd attach before mountroot, I can debug
this issue, but need some hints on where to start.
I haven't been following this thread, and I'm pretty sleepy right now, so
sorry if this is irrelevant, but I had a somewhat similar problem that was
fixed by adding
hint.atkbd.0.flags="0x1"
to /boot/device.hints .
--
Nate Eldredge
[EMAIL PROTECTED]
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