[sane-devel] genesys : "Error during device I/O"

[Johannes Meixner]

Hello,

On Feb 12 19:33 Pierre Couderc wrote (excerpt):
> On 02/09/2017 01:49 PM, Johannes Meixner wrote:
>> 
>> See "Trouble-Shooting (Debugging)" at
>> https://en.opensuse.org/SDB:Configuring_Scanners
>> 
> ... my USBs are USB2 ...
> ... I thnk there is a problem with genesys ...
...
> [genesys] genesys_flatbed_calibration:
>   led calibration failed: Error during device I/O

I don't know any details about the genesys driver/backend
but I guess it is not the genesys backend itself that fails
but it fails because of a lower level error during device I/O.

I.e. I guess it fails somewhere in the various USB layers
like libusb or kernel USB drivers/modules or USB hardware
cf. "Basics" and "USB" at
https://en.opensuse.org/SDB:Configuring_Scanners

Accordingly I would focus more on USB related debug messages
as described in "Trouble-Shooting (Debugging)" at
https://en.opensuse.org/SDB:Configuring_Scanners


Kind Regards
Johannes Meixner
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