--- Matthew Fincham <matthewf@cat.co.za> wrote:
> Hello
> 
> Apologies for sending the previous mail in RichText
> format. Here is it
> again. Sorry... :
> 
> I am having difficulty getting the keyboard to work
> when the system boots up
> without a keyboard, and then has the keyboard
> plugged in after the boot-up
> sequence is complete.
> 
> The actions I take are these:
> 
> 1. unplug the keyboard, and reboot the system. Leave
> the keyboard unplugged.
> 2. once the system has booted up, plug the keyboard
> in and try to login.
> 
> If the keyboard is not working, then repeat step 1.
> What I find is that the
> keyboard works on alternate reboots (works, doesn't
> work, works, ....).
> 
> I have added debug info to the kernel, and have
> included the relevant (??)
> parts in the e-mail. Essentailly, there are three
> cases to look at:
> a) boot with keyboard plugged in
> b) boot without keyboard plugged in, and when
> plugged in, keyboard works
> c) boot without keyboard plugged in, and when
> plugged in, keyboard does not
> work
> 
> a) Keyboard Plugged In
> =================
> pckbc0 at isa0 port 0x60-0x64
> pckbdprobe: reset succeeded!
> pckbdprobe:resp[0]=0xaa -> continuing
> pckbdprobe: flushing kbd buffer
> pckbd: the 8042 is translating -> use AT codes
> pckbdprobe: succeeded setting xtscancode
> pckbd0 at pckbc0 (kbd slot)
> pckbc0: using irq 1 for kbd slot
> 
> wskbd_match
> Console unspecified
> wskbd0 at pckbd0
> wskbd_attach: console keyboard
> wskbd_add_mux: 0 dmux0 0xc0866e00
> wskbd_set_display()
> Ebusy 1, using wsdisplay0
> pmsi0 at pckbc0 (aux slot)
> pckbc0: using irq 12 for aux slot
> wsmouse0 at pmsi0wsmux_attach: n=0
> mux 0
> 
> b) Boot without keyboard plugged in, and when
> plugged in, keyboard works
>
======================================================
> pckbc0 at isa0 port 0x60-0x64
> pckbdprobe: reset error 5
> pckbdprobe: returning 1
> pckbd0 at pckbc0 (kbd slot)
> pckbc0: using irq 1 for kbd slot
> 
> wskbd_match
> Console unspecified
> wskbd0 at pckbd0
> wskbd_attach: console keyboard
> wskbd_add_mux: 0 dmux0 0xc0866e00
> wskbd_set_display()
> Ebusy 1, using wsdisplay0
> pmsi0 at pckbc0 (aux slot)
> pckbc0: using irq 12 for aux slot
> wsmouse0 at pmsi0wsmux_attach: n=0
> mux 0
> 
> c) Boot without keyboard plugged in, and when
> plugged in, keyboard does not
> work
>
============================================================
> pckbc0 at isa0 port 0x60-0x64
> pckbdprobe: reset succeeded!
> pckbdprobe:resp[0]=0xaa -> continuing
> pckbdprobe: flushing kbd buffer
> pckbd: the 8042 is translating -> use AT codes
> pckbd: error setting scanset 2
> pckbd0 at pckbc0 (kbd slot)
> pckbc0: using irq 1 for kbd slot
> 
> wskbd_match
> Console unspecified
> wskbd0 at pckbd0
> wskbd_attach: console keyboard
> wskbd_add_mux: 0 dmux0 0xc0866e00
> wskbd_set_display()
> Ebusy 1, using wsdisplay0
> pmsprobe: reset error 5
> pmsiprobe: reset error 5
> 
> 
> The most obvious thing I can see is that in case
> (c), when the keyboard is
> not present and when plugged in fails, the reset
> command works! This seems
> strange, because the reset command polls for a
> response...but there is no
> keyboard. In case (b) the reset command fails, which
> makes a lot more sense.
> 
> The situation this needs to be solved for is where a
> number of systems use a
> single montior and keyboard with a switch-box. We
> need the systems to be
> able to boot without the switch-box switched to the
> booting machine. (the
> tests done here did not involve the switch-box, but
> just a single keyboard
> and system, so I don't think it is an issue with the
> switch-box)
> 
> Does anyone have any ideas why case (c) behaves as
> it does? Any help would
> be appreciated.
> 
> Thank you
> Matthew Fincham
> 

I haven't read every detail here, so I apologize if I
missed something.

When you mentioned that the problem is somewhat
random, I immediately think that you may have damaged
the keyboard or the keyboard controller. It's not
entirely out of the question that this happened. It's
not 100% safe to unplug or plug in the keyboard while
the machine is running. My two cents... I don't think
I read that you tried another keyboard so maybe you
should.

Andy

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