Re: [Qemu-devel] [SOLUTION] "i8042.c: No controller found" -> OS sees no keyboard if I type "in BIOS"

[Avi Kivity <avi@redhat.com>]

Tomasz Chmielewski wrote:
> Tomasz Chmielewski wrote:
>> Marcelo Tosatti wrote:
>>
>>>> Or Qemu, for having its keyboard buffer too large (I'm not sure, 
>>>> but probably 256 bytes)?
>>>
>>> All references (*) i could find mention 16 bytes of output buffer
>>> (including the Linux source as you mentioned, which was reduced from 32
>>> to 16 somewhere in the 2.6.10 era).
>>>
>>> http://www.computer-engineering.org/ps2protocol/
>>>
>>> http://linux.bkbits.net:8080/linux-2.6.28-stable/drivers/input/serio/i8042.h?PAGE=diffs&REV=4203735dp_doSExYU6ido8KnczbjzQ 
>>>
>>>
>>> Reducing PS2_QUEUE_SIZE to 16 also makes the Linux detection loop 
>>> happy.
>>>
>>> If QEMU claims to emulate i8042, it should be similar to real hardware.
>>>
>>> However i'm not familiar with PS/2 or i8042. Anthony?
>>
>> This:
>>
>> #define KBD_QUEUE_SIZE 256
>>
>> dates back to qemu-0.5.1, where it was defined in vl.c.
>>
>> Seems like it's in Qemu from the very beginning?
>>
>>
>> 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.


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error compiling committee.c: too many arguments to function