[sane-devel] How to fix "Device busy"?

[ken]

On 12/18/18 3:54 PM, ken wrote:
> Trying to run a scan to an HP OfficeJet Pro 8620 (though I'm thinking
> that's irrelevant), I get a failure.  The last message I get is this:
>
> Page 1: Scanning...
> error: SANE: Device busy (code=3)
> Closing device.
> Return status of hp-scan command was 0 Exiting....
>
> Looking for more info, I try this:
>
> $ scanimage -T -vvv
> scanimage: sane_start: Device busy
> Closing device
> Calling sane_exit
> scanimage: finished
>
> The scanner/printer isn't seeing any kind of scanner event, so I'm
> thinking that sane_start isn't even getting off the PC, not sending
> anything to the scanner/printer.
>
> I've tried rebooting both the printer/scanner and the PC, but the error
> condition remains exactly the same.
>
> In /var/log/messages there is this:
>
> python: hp-scan[19042]: warning: Invalid value for br-x (br-x > max
> value of 215). Using 215.
> python: hp-scan[19042]: error: SANE: Device busy (code=3)
>
> So I'm thinking that some value related to some device needs to be
> cleared or reset somehow.  Anyone know what to do either to fix the
> problem or to get more diagnostic info?
>
> Thanks for the wisdom.

I just noticed I may have been too eager in pruning the
/var/log/messages output (above),  Here's a couple more lines to it:

python: hp-scan[19042]: warning: Invalid value for br-x (br-x > max
value of 215). Using 215.
python: hp-scan[19042]: error: SANE: Device busy (code=3)
python: io/hpmud/hpmud.c 361: device_cleanup: device
uri=hp:/net/HP_Officejet_Pro_8620?ip=192.168.0.29
python: io/hpmud/hpmud.c 373: device_cleanup: close device dd=1...
python: io/hpmud/hpmud.c 375: device_cleanup: done closing device dd=1

Maybe that will help in tracking down the offending device.  (?)