Backchannel on OSX 10.4

[keens312]

> keens312 wrote:
> > Hi Michael,
> >
> > On 10.4, the usb backchannel is one-way, host->printer, is this true?
>
> Yes, although it isn't called a backchannel in that direction...
>
> > To receive printer feedback information on 10.4, developers have to write a own bi-di usb backend to replace Apple's standard one.
> >
> > Or write a USB IOKit to do the IPC with CUPS filter.
> >
> > What's the best solution for bachchannel on 10.4?
>
> You want to look at doing a USB class driver - Apple DTS can supply
> you with the sample code.  The USB class driver allows you to add a
> "read" function to the Apple standard class driver - basically you
> just write/replace the parts you need to.
>
> --
> ______________________________________________________________________
> Michael R Sweet                        Senior Printing System Engineer
>
Hi Michael,

I am using the USB class driver for 10.4 backchannel.

But one shortage of this solution is that users have to restart OSX after installation of the printer driver. (Restart for taking USB class driver take effect).

Can I avoid restart?

Thanks
Keene