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

[Allen B. <ba...@lo...>]

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.)

OK?

Allen

Carlos Puchol wrote:
> 
> Allen Barnett <ba...@lo...> wrote:
> > I've noticed now that since upgrading to RH 7.1 (which actually involved
> > reverting the kernel to an earlier rev.), that cold starting the USB
> > printer and the ptal daemons from hotplug doesn't work reliably anymore.
> > I have to re-plugin the printer and start the daemons manually after the
> > machine is up and stable.
> 
> hi allen,
> 
> i think this is what it is happening in my case, it is just that i was
> assuming that loading the daemons via the hotplugging was not
> an issue. in fact, it would seem rather harmless to do it automatically
> vs manually. perhaps a matter of timing?
> 
> it would seem then that my asus usb hardware is ok.
> 
> what exactly do you have to re-load every time?
> 
> i was able to put the printer back in operation on usb now.
> i removed the uhci and printer modules, then plugged the printer.
> then loaded the modules, then ran the daemons.
> 
> killall -HUP ptal-printd ptal-mlcd
> rmmod uhci printer; modprobe uhci printer
> ptal-mlcd usb:0 -device /dev/usb/lp0; ptal-printd mlc:usb:0 -like /dev/lp0
> # plug or power on printer
> 
> what could be the problem be with this script in /etc/hotplug/usb/printer
> 
> #!/bin/sh
> #
> # this is /etc/hotplug/usb/printer
> #
> if [[ -n "$PRODUCT" && $(expr $PRODUCT : 3f0) = 3 ]] ; then
>         /opt/hpoj-010515/bin/ptal-mlcd usb:0 -device /dev/usb/lp0
>         /opt/hpoj-010515/bin/ptal-printd mlc:usb:0 -like /dev/lp0
> fi
> 
> thanks for your help!