[sane-devel] "Error during device I/O" with Fujitsu fi65-F (epjitsu backend)

[Jonas Neubert]

I just did a few successful scans! The patch does indeed make the scanner work, with two caveats:

1) Only every other call to scanimage results in a successful scan, the 2nd, 4th, 6th, etc scan fails the same way as before.
2) Even during successful scans the debug output contains an 'Error during device I/O', although I'm not sure if this is even a problem.

Debug output from a successful scan (1st, 3rd, 5th, ... call to scanimage): https://gist.github.com/jonemo/489414e8bc5590998890
Debug output from an unsuccessful scan (2nd, 4th, 6th, ... call to scanimage): https://gist.github.com/jonemo/8a4cf7d13a50556b3c41

I also tried scanning at 600dpi and it worked successfully (every other time).

-Jonas

---- On Mon, 16 Mar 2015 05:26:04 -0700 m. allan noah<kitno455 at gmail.com> wrote ---- 

 > I have attached a minor patch to the backend. The idea is to send 
 > commands in the same order as the windows driver, starting with get 
 > hardware status. If this does not fix it, I will move on to set 
 > window, which looks like it should be after the initial coarse 
 > calibration payload. 
 >  
 > allan 
 >  
 > On Mon, Mar 16, 2015 at 7:34 AM, m. allan noah <kitno455 at gmail.com> wrote: 
 > > Hmm- the scanner is upset that we tried to send window data. Perhaps 
 > > it wants some other command to be sent first. I will look at your pcap 
 > > again and come up with a patch 
 > > 
 > > allan 
 > > 
 > > -- 
 > > "well, I stand up next to a mountain- and I chop it down with the edge 
 > > of my hand" 
 >  
 > --  
 > "well, I stand up next to a mountain- and I chop it down with the edge 
 > of my hand" 
 >