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Date: Fri, 10 Jul 2009 09:21:17 +0100
From: Mark Cave-Ayland <mark.cave-ayland@siriusit.co.uk>
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Subject: Re: [Qemu-devel] Re: [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>	<loom.20090709T005828-509@post.gmane.org>
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To: Dinesh Subhraveti <subhraveti@gmail.com>, qemu-devel@nongnu.org

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...


ATB,

Mark.

-- 
Mark Cave-Ayland - Senior Technical Architect
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