[sane-devel] Canon LiDE 80 (2nd try)
pierre at pirsoft.dnsalias.org
Mon Feb 11 16:04:13 UTC 2008
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.
> 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
>> Which way is your scanner connected ?
> Directly to the computer, no hubs.
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