[sane-devel] HP 7450C libusb problems

[insane@piments.com]

Hi,

Yes this seems to be a pretty broad issue with sane/libusb and more recent  
2.6.x kernels

I am getting very similar behaviour from my canoscan FB636U on  
Athlon-XP/Gentoo/2.6.6 kernel.

[ebuild   R   ] media-gfx/xsane-0.93
[ebuild   R   ] media-gfx/sane-backends-1.0.14-r2
[ebuild   R   ] dev-libs/libusb-0.1.8


It was scanning briefly at one stage and I think I was running early 2.6  
kernels at that time although I can not be precise.

I does not appear to be a problem in the kernel itself since vuescan works  
perfectly on this system.


If sane is going to continue to be an option it appears some dev work is  
needed to resolve this issue.

I emailed Oliver Rauch and he indicated I should contact the backend  
maintainer (who apparently no longer replies to bug reports).


But it seems from some of the posts here that the issue is much larger.


Could someone remind me what the debug line is for this scanner so I can  
get more detailed output.

Thanks, Peter.





On Sun, 06 Jun 2004 19:21:07 +0200, Sietse Achterop <sietse@cs.rug.nl>  
wrote:

> Rene Rebe wrote:
>>
>>>   I'm getting a lot of problems with Fedora kernels 2.6.5-1.358 and
>>> 2.6.6-1.422 and this scanner.
>>
>   ......
>>  Hm - works here on 2.6.3 on an UltraSPARC and an iBook. I can test
>> 2.6.6 in the next days - but I heared here on this list that recent
>> 2.6 kernels have some USB problem(s)?
>>
>
>       Hi,
>
> Indeed, and I just retried it using the latest kernel (2.6.7-rc2-bk7) and
> the problem stays the same; somehow a bulk transport in usb falls in a  
> timeout.
> Now the /var/log/kernel mentions:
>
> Jun  6 19:05:01 localhost kernel: usb 1-1: new full speed USB device  
> using address 3
> Jun  6 19:06:11 localhost kernel: usb 1-1: bulk timeout on ep3in
> Jun  6 19:06:11 localhost kernel: usb 1-1: usbfs: USBDEVFS_BULK failed  
> ep 0x83 len 4096 ret -110
> Jun  6 19:06:41 localhost kernel: usb 1-1: bulk timeout on ep2in


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