hp TC4200 tablet

[Roland Smith]

On Mon, Feb 23, 2009 at 10:52:48AM -0800, prad wrote:
<snip>
> > > is there anyway to find out if the tablet is actually being
> > > recognized?  
> > 
> > Check if /dev/ttyd0 really exists. Also check dmesg output to see if
> > the device is recognized.
> > 
> here we have a curious problem.
> /dev/ttyd0 is there in the /dev directory.
> dmesq puts out the following for sio:
> sio0: configured irq 4 not in bitmap of probed irqs 0
> sio0: port may not be enabled
> sio0: configured irq 4 not in bitmap of probed irqs 0
> sio0: port may not be enabled

I get more or less the same on my system so far. 

> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
> sio0: type 8250 or not responding

But mine differs here:

sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A

Looks like the serial hardware is not being recognized. It would
supprise me that a relatively modern system would have a 8250 chip,
which dates back to the IBM XT! One would expect a 16550A.

Could be that the serial hardware is b0rken.

> now we don't understand how the sio stuff relates to the /dev/ttyd0
> and /dev/cuad0

See the sio manual page, under FILES; 'man 4 sio'.
 
> > The input-wacom driver comes with a couple of programs (see
> > /usr/ports/x11-drivers/input-wacom/pkg-plist) that might be helpfull
> > as well, e.g. xsetwacom.  
> >
> thank you.  we just tried a wacdump on /dev/ttyd0 from x and console -
> both times the entire system froze.  what this suggests, i think, is
> that the kernel thinks there is nothing there at ttyd0 - in other
> words, the tablet's existence has not been picked up by the kernel.

Or the serial chip is fried. Chek if you have any weird settings for
sio0 in /boot/device.hints.

Roland
-- 
R.F.Smith                                   http://www.xs4all.nl/~rsmith/
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