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

[Tomasz Chmielewski]

Marcelo Tosatti 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.
>
> I was not able to trigger it by changing PS2_QUEUE_SIZE to 16 (which
> shows the testing was lame, since you did trigger it).

For me, moving mouse adds to the buffer really fast.


> > 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).
>
> No, 16. Maybe there's some off-by-one bug in hw/ps2.c? Also yesterday i
> was not entirely sure the KBD_STAT_OBF (output buffer empty/full status
> bit) handling was correct (thus the attached patch), but now a quick
> look seems to indicate it is alright, since it be will update these bits
> via:

(...)

> -#define PS2_QUEUE_SIZE 256
> +#define PS2_QUEUE_SIZE 16

15? With 16 it can still break (broken BIOS?).


--
Tomasz Chmielewski
http://wpkg.org