Re: Machine does not find AT keyboard with 2.6.13.1

[Vojtech Pavlik <vojtech@suse.cz>]

On Fri, Sep 16, 2005 at 02:47:10AM -0700, Andrew Morton wrote:
> "Roger Heflin" <rheflin@atipa.com> wrote:
> >
> > I have an older machine that fails to find the AT keyboard.   The machine is
> >  based
> >  on an Intel 7501 chipset.
> > 
> >  Under the default fedora core 4 kernel, it found the keyboard and that
> >  keyboard
> >  worked in UP mode, in SMP mode the machine crashed, but that is a different
> >  issue.
> > 
> >  Under 2.6.13.1 the machine boots under SMP and does not crash, dmesg does
> >  not report
> >  the keyboard being found, and the keyboard fails to work.  The .config file
> >  does have
> >  CONFIG_KEYBOARD_ATKBD set to Y.   The keyboard was being found was seen on
> >  the default
> >  fedora core 4 kernel.   There are no extra options on the boot cmdline.
> > 
> >  The important messages seem to be:
> > 
> >  Fedora Core 4 default UP kernel boot:
> >  Sep 15 19:55:12 node001 kernel: serio: i8042 AUX port at 0x60,0x64 irq 12
> >  Sep 15 19:55:12 node001 kernel: serio: i8042 KBD port at 0x60,0x64 irq 1
> >  Sep 15 19:55:12 node001 kernel: input: AT Translated Set 2 keyboard on
> >  isa0060/serio0
> > 
> >  New boot (2.6.13.1 smp boot)
> >  Sep 15 21:12:35 node001 kernel: i8042.c: Can't read CTR while initializing
> >  i8042.

"usb-handoff" on the kernel command line should solve this. I thought we
already had that as a default, or was the patch to make it so dropped?

> >  The i8042 is of course missing out of /proc/interrupts on the new boot.
> 
> That I8042_CMD_CTL_WCTR write-and-test seems to be new.  Can you try taking
> it out?

It's not a test, it's enabling the port interrupt. It won't work
without it at all.

> --- devel/drivers/input/serio/i8042.c~a	2005-09-16 02:45:02.000000000 -0700
> +++ devel-akpm/drivers/input/serio/i8042.c	2005-09-16 02:46:51.000000000 -0700
> @@ -305,11 +305,6 @@ static int i8042_activate_port(struct i8
>  
>  	i8042_ctr |= port->irqen;
>  
> -	if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
> -		i8042_ctr &= ~port->irqen;
> -		return -1;
> -	}
> -
>  	return 0;
>  }
>  
> _
> 
> 

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR
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