Re: [hpoj-devel] Re: [linux-usb-devel] any success w/ asus a7v133 onboard controller?

[Carlos P. <cp...@ro...>]

Allen Barnett <ba...@lo...> wrote:
> I think I've diagnosed this problem. When ptal-mlcd is started by this
> sequence of events:
> 
> kernel -> khubd: notices a new device
> khubd -> /sbin/hotplug add usb
> /sbin/hotplug -> /etc/hotplug/usb.agent -> /etc/hotplug/usb/printer ->
> ptal-mlcd
> 
> It turns out that STDIN is not open when ptal-mlcd starts! Therefore,
> when ptal-mlcd opens its command socket, /dev/ptal-mlcd/usb:0, that
> socket gets file descriptor = 0. Later, ptal-mlcd closes STDIN in
> consoleOpenQuiet, inadvertently closing the socket.
> 
> (It didn't occur to me until just now that a simple fix might be to use
> 	ptal-mlcd usb:0 -device /dev/usb/lp0 < /dev/null
> in the script.)

good catch!

now, i would call it a work-around, rather :-)

the other issue is how to unload the drivers when the
printer is unplugged.