[sane-devel] Linux, BearPaw 1200, I/O errors

[Gerhard Jaeger]

On Sunday 20 February 2005 19:06, Enleth wrote:
> And another interesting thing:
> I've checked it with PLD LiveCD, on *the same machine* it is working 
> just *perfeclty* on under Win98.
> The results were somewhat better, but that's still too few to call it a 
> working hardware.
> Here's an image with description of what the scanner did: 
> http://enleth.com/smieci/scanner.png
> PLD LiveCD works under 2.6.4 kernel, with sane 1.0.12. It didn't work at 
> all on my PC. These two machines are completely different, mine is a 
> brand new PC with nForce2 mainboard (and, thus. nForce USB controller), 
> the second one is eight-years-old pile of crap with some VIA mainboard.
> Generally, something's REALLY wrong there, but I can't say what - I 
> don't have any experience with troubleshooting USB problems...
> 
> -- 
> Enleth
> http://enleth.com , MAIL enleth//enleth.com , JID enleth//chrome.pl

Hi,

here are some things to try/clarify:

- when using scanimage, the default scansize is 126x76 mm
- try using libusb even on 2.4.2x kernels I don't think that the
  scanner module is a good idea.
- use libusb-0.1.8 or 0.1.10 - 0.1.9 seems to be buggy
- disable all the backends but plustek
- for getting debug information from the plustek backend, try:
  export SANE_DEBUG_PLUSTEK=20

I'm pretty sure, that this is a USB problem and not backend related.

Ciao,
Gerhard