[sane-devel] lost with FUJITSU scanner M3096G

[Frank Zago]

abel deuring wrote:
> Frank Zago wrote:
> 
>>>[fujitsu] set_window_param
>>>[fujitsu] Window set
>>>[fujitsu] 000: 00 00 01 2c 01 2c 00 00 00 00 00 00 00 00 00 00
>>>[fujitsu] 016: 03 b0 00 00 05 89 00 00 00 02 08 00 00 00 00 00
>>>[fujitsu] 032: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0
>>>[fujitsu] 048: 20 00 00 00 00 84 00 00 00 00 00 00 00 00 00 00
>>>[fujitsu]       5/38/0: Invalid field in parm list
>>>[fujitsu] sanei_scsi_cmd: returning 0x00000004
>>>[fujitsu] sane_start: ERROR: failed to set window
>>
>>The scanner rejected the window parameter. If the scsi implementation is decent,
>>the sense might contain the offset of the offending byte somewhere around byte
>>16 oy 17. To get that, at the beginning of scsi_sense_handler, add this line:
>>
>>   hexdump (MSG_IO, "Sense", sensed_data, sensed_data[7]+8);
> 
> 
> Frank,
> 
> you're right, the sense bytes 16 and 17 should point to the offending
> byte, but unfortunately the Linux SCSI system returns only the first 16
> bytes of a SCSI command.


Are you sure of that? There are devices out there that return more than 100 
bytes of data in the sense. I assume someone would have fixed such a problem.


> But it might help to issue a REQUEST SENSE manually after the failing
> SET WINDOW and print the result of this command. 

Unless the system caches the sense (and more than 16 bytes), the next request 
sense isn't going to return anything.

Frank.