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Date: Mon, 08 Jun 2009 17:08:35 +0200
From: Tomasz Chmielewski <mangoo@wpkg.org>
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Subject: Re: [Qemu-devel] [SOLUTION] "i8042.c: No controller found" -> OS
	sees no keyboard if I type "in BIOS"
References: <4A0C232D.1020201@wpkg.org>	<4A13CDC4.3000704@wpkg.org>	<4A1405E1.70405@wpkg.org>	<20090607040410.GA25831@amt.cnet>
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To: Avi Kivity <avi@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, Marcelo Tosatti <mtosatti@redhat.com>, qemu-devel@nongnu.org

Avi Kivity wrote:

>>> PS2_QUEUE_SIZE 256 was introduced in qemu-0.8.0.
>>
>> BTW, with "PS2_QUEUE_SIZE 16" I'm still able to trigger:
>>
>> i8042.c: No controller found.
>>
>>
>> Only with "PS2_QUEUE_SIZE 15" keyboard is detected every time I boot 
>> the guest (unless that's what you meant by setting it to 16).
>>
> 
> I think this points to a bug in the bios.  The keyboard-internal queue 
> size shouldn't cause any problems.

It could be.

That's something along the lines with what Vojtech Pavlik suggested[1]:

      This looks seriously like uninitialized memory (12-bit FAT
      perhaps?) - and very much like a Qemu bug. It doesn't even make
      sense if interpreted as keyboard scancodes - 00 is reserved and ff
      is an error condition.

[1] http://lists.gnu.org/archive/html/qemu-devel/2009-05/msg00943.html


-- 
Tomasz Chmielewski
http://wpkg.org