USB (sane) stability issues

[Stefan Ehmann]

On Thu, 2006-04-06 at 16:53 +0200, Stefan Ehmann wrote:
> I recently acquired a CanoScan LiDE 60.
> 
> It basically works but it is very unstable: It often stops during the
> scan and sane returns an error, or it just hangs during the scan (making
> ugly noises). The only remedy is to re-plug the usb cable. (which
> sometimes causes a panic)
> 
> I tried on my notebook which is running a recent current. It works
> flawlessly there - not a single error so far.
> 
> So I upgraded my main computer to 6.1-PRERELEASE but the problem
> persists:
> 
> - Are there any usb/ehci fixes in CURRENT that haven't made it to
> 6-stable yet? (I really don't want to update the machine that's making
> troubles to current)
> 
> - Or is this more likely to be chipset related (the notebook dmesg shows
> <Intel 82801DB/L/M (ICH4) USB 2.0 controller> vs VIA on the computer
> that causes troubles)
> 
> Also, it occured to me that this could be power related - the scanner
> doesn't require an external power suppply. I tried different USB ports
> but didn't notice any difference.
> 
> dmesg can be found here:
Here's the location:
http://stud4.tuwien.ac.at/~e0125637/fbsd/dmesg