Date: Wed, 15 Mar 2006 12:27:08 -0500 From: John Baldwin <jhb@freebsd.org> To: "Rick C. Petty" <rick-freebsd@kiwi-computer.com> Cc: freebsd-hackers@freebsd.org Subject: Re: 6.1-PRE boot locks up, using USB keyboard Message-ID: <200603151227.10535.jhb@freebsd.org> In-Reply-To: <20060315171154.GA37945@megan.kiwi-computer.com> References: <20060315005348.GA32144@megan.kiwi-computer.com> <200603151046.03551.jhb@freebsd.org> <20060315171154.GA37945@megan.kiwi-computer.com>
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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.
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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