[sane-devel] Canon LiDE 80 (2nd try)

[Pierre Willenbrock]

Reinhard Biegel schrieb:
> Am Monday, 11. February 2008 schrieb Stefan Lucke:
>>> ...........
>>> [genesys_gl841] reg[0x6b] = 0x02
>>> [genesys_gl841] reg[0x6e] = 0x6d
>>> [genesys_gl841] gl841_bulk_write_register: failed while writing command:
>>> Invalid argument
>>> scanimage: open of device genesys:libusb:001:010 failed: Invalid argument
>> At that moment, I guess you'll see messages like:
>> 	new high speed USB device using ehci_hcd and address nn
>> via dmesg.
> 
> Hi,
> Yes, thats right.
> 
> Changing the write to reg 0x6b from 0x0c to 0x08 fixes that. 
> Scanner is producing noisy image now.
> 
> Do I see right that the two bits (0x04 and 0x08 of register 0x6b) affect two 
> pins which are marked as 'reserved' in the datasheet? They are only 
> documented for GL843.

Register 0x6b is very different between GL841/2 and GL843. But the
documentation around the pins controlled with 0x6b is a bit lacking.

Did someone post the bcdDevice value of a LiDE 80? GL841 goes up to
3.0.5, as someone said, and GL842 begins with 3.0.6

> After scanning I have to replug the scanner, otherwise I get an error message 
> telling me the document feeder is jammed. Curiously, if I set 
> SANE_DEBUG_GENESYS, there comes up another error about a failed bulk_write.

The "feeder jammed" error happens when the backend thinks your scanning
head is stuck. For example when someone forgot to open the lock. I guess
we need SANE2 for more/better error messages. It is probably not really
stuck, but the sensor input is incorrect.

> 
> Also I noticed that the LED isn't continuously illuminated. In one half it's 
> continuous, but in the other there are small gaps (about 1mm) with about 4mm 
> spacing between. In the middle there are a few with bigger spacing.

Sounds like it would normally be backtracking between the lighted areas,
but does not for some reason. Just guessing. The LiDE 80 support is far
from complete.

> 
>> Which way is your scanner connected ?
> Directly to the computer, no hubs.
> 
> Regards,
> Reinhard
> 

Regards,
  Pierre