[sane-devel] genesys : "Error during device I/O"
jsmeix at suse.de
Wed Feb 15 10:19:48 UTC 2017
On Feb 12 19:33 Pierre Couderc wrote (excerpt):
> On 02/09/2017 01:49 PM, Johannes Meixner wrote:
>> See "Trouble-Shooting (Debugging)" at
> ... 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
Accordingly I would focus more on USB related debug messages
as described in "Trouble-Shooting (Debugging)" at
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