Date: Wed, 15 Mar 2006 18:16:50 -0700 From: Scott Long <scottl@samsco.org> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org, "Rick C. Petty" <rick-freebsd@kiwi-computer.com> Subject: Re: 6.1-PRE boot locks up, using USB keyboard Message-ID: <4418BC82.5020307@samsco.org> In-Reply-To: <200603151227.10535.jhb@freebsd.org> References: <20060315005348.GA32144@megan.kiwi-computer.com> <200603151046.03551.jhb@freebsd.org> <20060315171154.GA37945@megan.kiwi-computer.com> <200603151227.10535.jhb@freebsd.org>
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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
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