6.1-PRE boot locks up, using USB keyboard

[Scott Long]

John Baldwin wrote:
> On Wednesday 15 March 2006 12:11, Rick C. Petty wrote:
> 
>>On Wed, Mar 15, 2006 at 10:46:01AM -0500, John Baldwin wrote:
>>
>>
>>>>I'm using a USB keyboard, no PS/2.  I've tried the hint to disable kbdmux,
>>>>I've tried with and without selecting the "Boot w/ USB keyboard" and the
>>>>machine locks up in the same spot no matter what I try.  The same hardware
>>>>boots just fine with 6.0-RELEASE (although I need to choose the USB
>>>>keyboard option if I plan on typing).  Any suggestions?
>>>
>>>What if you turn off USB keyboard support in your BIOS?
>>
>>My BIOS (Asus A8N-E rev 1010) has no option for disabling USB keyboard
>>support, but I can either disable the USB controller or disable the USB
>>legacy support.  I doubt either of these is desirable.  Fortunately, I
>>discovered the problem..
> 
> 
> The "legacy support" option is the one that makes a USB keyboard look like
> a PS/2 keyboard.
> 
> 
>>The ukbd device is compiled into GENERIC.  I also had ukbd_load="YES" in my
>>loader.conf so it would be compatible with a custom kernel.  When GENERIC
>>boots, I get the message that ukbd is already loaded ("file exists").  I
>>would expect that the kernel just ignores the attempt, but apparently there
>>is an adverse effect.  Whenever ukbd is loaded by /boot/loader and that
>>device already exists in the kernel, the boot locks up after:
>>
>>atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
>>
>>when using a USB keyboard.  I would think this is a bug.  It is 100%
>>repeatable for me.  If I comment out the line in /boot/loader.conf, the
>>system boots nicely.  Perhaps this is related to kbdmux(4), but I'm not
>>sure.  I've also noticed related problems when trying to load umass and ums
>>through the boot loader and manually (I will try to reproduce these).
>>Maybe the problem is in the USB layer??
>>
>>FYI, I tried this on 6.1-BETA4, fresh from the ISOs.
> 
> 
> Ok.  There are several edge cases that can blow up if you kldload a module
> or load a module from the loader that is already present in the kernel.
> 

Alternately, I've heard from some people with a similar problem that 
turning off USB2 but leaving plain USB on avoids the problem.  I'm not 
exactly sure how or why this is, but it's worth a try I guess.

Scott