Re: Machine does not find AT keyboard with 2.6.13.1
From: Vojtech Pavlik
Date: Fri Sep 16 2005 - 06:49:42 EST
On Fri, Sep 16, 2005 at 02:47:10AM -0700, Andrew Morton wrote:
> "Roger Heflin" <rheflin@xxxxxxxxx> 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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