[sane-devel] PIXMA TS8300 Series not working

Alexander Pevzner pzz at apevzner.com
Mon Oct 5 21:45:05 BST 2020

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.


	Wishes, Alexander Pevzner (pzz at apevzner.com)

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