linux-kernel - Re: 2.6.35-rc2,3 -- Problem with PS2 keyboard and mouse driver

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Date:	Fri, 02 Jul 2010 17:41:19 -0300 (GFT)
From:	werner@...ane.dyn-o-saur.com
To:	Paulo Marques <pmarques@...popie.com>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.35-rc2,3 -- Problem with PS2 keyboard and mouse driver

I compiled 2.6.35-rc3-git7 applying this patch, but the problem continues.

I have an USB keyboard and mouse.     For BIOS and lilo the keyboard works normally.    However, when the kernel loads, it stops imediately.   I can check this by pressing repeatedly the key lock and observing when the light don't blink.

On -rc2 came arbitrarily characters (but only 1 por line) on the text screen. A PS2 keyboard blocks completely as explained above (and also the PS2 mouse t dont work), an USB keyboard worked almost normally in the grafic mode(also the PS2 mouse worked),  

But on -rc3 , no kind of keyboard didn't work anymore.   

Rebooting with 2.6.35-rc1, everything works normal.

Thus, the error entered between -rc1 and -rc2 , on something what was changed also till -rc3 so that it then become more worse.


Werner Landgraf

===============================================
On 02/Jul/2010 09:05 Paulo Marques wrote ..
> werner@...ane.yi.org wrote:
> > 2.6.35-rc2,3,3-git1 -- Problem with PS2 keyboard and mouse driver
> > 
> > That problem continues at -git6 .
> > 
> > Since 2.6.35-rc2 the USB keyboard driver don't work longer, on
> > different mainboards and keyboards.
> > 
> > On 2.6.35-rc1 things still were (more or less) normal.
> > 
> > THIS IS AN ERROR WHICH ENTERED BETWEEN 2.6.35 -rc1 and -rc2 !!
> 
> The address 07200720 looks like a couple of gray spaces in a vga console
> and I've seen that before not long ago.
> 
> After a bit of searching, I've found it: it's in the thread that started
> with "Linux 2.6.35-rc2", and most importantly in the thread:
> 
> BUG kmalloc-4096: Poison overwritten (2.6.35-rc2)
> 
> where there is a patch that is supposed to fix this. I thought this was
> already applied upstream, though...
> 
> For your convenience, the patch in that thread is this one (might be
> white space mangled, as I just copy+pasted it, so you might need to
> apply it by hand):
> 
> ---
>  drivers/char/vt.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/char/vt.c b/drivers/char/vt.c
> index 1296c42..e123958 100644
> --- a/drivers/char/vt.c
> +++ b/drivers/char/vt.c
> @@ -304,8 +304,8 @@ static void scrup(struct vc_data *vc, unsigned int
> t, unsigned int b, int nr)
>  	d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
>  	s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
>  	scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
> -	scr_memsetw(d + (b - t - nr) * vc->vc_size_row, vc->vc_video_erase_char,
> -		    vc->vc_size_row * nr);
> +	scr_memsetw((void *)d + (b - t - nr) * vc->vc_size_row,
> +			vc->vc_video_erase_char, vc->vc_size_row * nr);
>  }
> 
>  static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b,
> int nr)
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