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

["Dinesh Subhraveti" <subhraveti@gmail.com>]

> 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