[Foomatic] Using usb IDs for autodetection

[Till Kamppeter]

For Epson inkjets you NEED to use the IEEE data (on USB via IOCTL), the 
vendor/product IDs are the same for nearly all printer models. Also the 
product names in the /proc/bus/usb/devices file or in the output of 
"lsusb" are more or less the same for all models.

    Till

Joe Shaw wrote:
> On Thu, 2004-04-08 at 17:47 -0400, David Chappell wrote:
> 
>>Has anyone ever seen a printer in which the IEEE-1284 and USB IDs 
>>differed?  Doesn't USB report IEEE-1284 ID strings?
> 
> 
> If you're doing the ioctl() on it to get the IEEE-1284 strings, then
> yes.
> 
> If you're looking at the product info in sysfs or trying to match it up
> to usb.ids, then not necessarily.  My Epson Stylus C64 gets reported as
> "Seiko Epson Corp." as the manufacturer (versus "EPSON" from the
> IEEE-1284) data.  And I realized -- followed by a fit of rage -- that
> all Epson Stylus printers have the same product ID, even if they're
> completely different printers.  sysfs reports it as "USB Printer",
> usb.ids reports it as "Stylus Printer", and IEEE-1284 as "Stylus C64".
> And so my hope that using USB IDs to solve the autodetection problem
> faded rather quickly.
> 
> Joe
> 
> 
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