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

[Dinesh Subhraveti]

> Dinesh Subhraveti wrote:
>
> > Sorry for the duplicate message above (mail server was taking hours to 
> > post, and I got impatient...)
> >
> > Changing PS2_QUEUE_SIZE to 15 and the "reserved space" to 8 fixes the 
> > problem for me:
> >
> > diff --git a/hw/ps2.c b/hw/ps2.c
> > index fb77005..51a3ab8 100644
> > --- a/hw/ps2.c
> > +++ b/hw/ps2.c
> > @@ -70,7 +70,7 @@
> >  #define MOUSE_STATUS_ENABLED    0x20
> >  #define MOUSE_STATUS_SCALE21    0x10
> >
> > -#define PS2_QUEUE_SIZE 256
> > +#define PS2_QUEUE_SIZE 15
> >
> >  typedef struct {
> >      uint8_t data[PS2_QUEUE_SIZE];
> > @@ -346,7 +346,7 @@ static void ps2_mouse_event(void *opaque,
> >      s->mouse_buttons = buttons_state;
> >
> >      if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
> > -        (s->common.queue.count < (PS2_QUEUE_SIZE - 16))) {
> > +        (s->common.queue.count < (PS2_QUEUE_SIZE - 8))) {
> >          for(;;) {
> >              /* if not remote, send event. Multiple events are sent if
> >                 too big deltas */
> >
> > Both keyboard and mouse remain responsive after reboot, no matter how 
> > much I type / move the mouse during reboot.
> >
> > Any comments?
>
> Hi Dinesh,
>
> Thanks for this. I've applied this patch to the copy of kvm which hosts 
> our NT4 virtual which has been experiencing random mouse/keyboard input 
> problems. Fingers crossed that your patch will fix this issue for good...

Hi Mark,

I am not sure if this patch helps with the original issue you reported --  
random movements of the mouse.  If it does help, that's awesome, but I can't 
explain it.

It is only supposed to address OS not seeing the keyboard / mouse on reboot.

Does anyone see any problem with the above patch?

Thanks,
Dinesh Subhraveti