[sane-devel] PIXMA TS8300 Series not working

[Thierry HUCHARD]

Le 2020-10-05 22:45, Alexander Pevzner a écrit :
> On 10/5/20 10:44 PM, Thierry HUCHARD wrote:
>>> Please notice, sane-escl has got a SIGSEGV. Though ippusbxd doesn't
>>> work very well, it cannot be a reason for SIGSEGV in the sane-escl.
>> Thank you Alexander,
>> to know if the problem comes from escl or ippusbxd, it would have been 
>> interesting to test with ipp-usb.
> 
> ippusbxd is the external program, sane-escl communicates with it over
> network. So even if it works wrong, for sane-escl it is a kind of
> invalid response from scanner. It should raise an error, not the
> crash. Scanner also can send invalid response.
> 
>> I think that Yoann's installation is corrupted, the TS8300 is 
>> referenced in PIXMA since version 1.0.30 and despite that it is not 
>> detected!
> 
> Running IPP-over-USB daemon may prevent sane-pixma backend from access
> to the USB device.
> 
> But in general I think that if some device provides both proprietary
> and "driverless" way of scanning/printing, driverless should be
> preferred. So although for some particular user disabling IPP-over-USB
> may work as a "hotfix", from community perspective this is better to
> investigate IPP-over-USB issues rather that to disable it when it
> doesn't work.
You know it I am not of this opinion, the PIXMA pilot is free and much 
more complete than the ESCL/AIRSCAN pilot.