[sane-devel] Problems with HP 6300C ADF

[Kristian Fiskerstrand]

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long-john01 wrote, On 11/11/2006 11:05 AM:
> questions:
> What kind of error is it?
> 	- thermal problem within the scanner
> 	- USB-communication in the scanner
> 		- Is it useful to try the SCSI-connector - I havn't got a SCSI adaptor and cable yet. 
> 	- USB communication of USB1.0 (scanner) and USB20 (computer)
> 	- timing (handshaking) between computer and scanner
> Can I reset the USB driver on the computer?
> Can I reset the scanner over USB?
> 

What does a "dmesg" command reveal? it sounds like your issue is having
some similarities with one of my systems, where the USB module seems to
be flooded at times. you can try a "sudo lsmod | grep -i usb" and
possibly remove, e.g. uhci-hcd ("sudo rmmod uhci-hcd"), possibly with
the force "-f" argument, and load it again using "sudo modprobe uhci-hcd"

Another issue might be that the computer is expecting USB2 and is
sending data too fast for the scanner to react to it, I remember this to
be a problem in the past with the CS3200F (experimental) module, "Known
issues: There may be problems with communications with the scanner if
you are running a fast processor (this was found by Kristian
Fiskerstrand, thanks!).It may happen, e.g., that after uploading the
firmware reading it back fails and thence the boot fails. I will
take a look at those speed issues later." (
http://www.scanners-on-linux.com/node/36 )

Personally I can recommend the Epson Perfection 4490 with the optional
ADF, that works perfectly for me.

- --
- ----------------------------
Kristian Fiskerstrand
http://www.kfwebs.net
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http://www.secure-my-email.com
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