I can confirm that creating /var/lock/sane solves the problem for
packaged libsane-plustek.so.1.0.31.
I don't need to add the USB device id to plustek.conf to make it work
though.

Martin

On Mon, Oct 12, 2020 at 9:51 AM Andreas Tscharner <a...@stupidmail.ch>
wrote:

> Hello World,
>
> I've had the same problem with my Canon CanoScan N650U. These are the
> following steps that I had to do to make it work again.
>
> * In the driver configuration (plustek.conf in my case): instead of just
> [usb]
> I had to change this section name to
> [usb] 0x04A9 0x2209
> I'm not sure about the exact numbers; these are the USB idVendor and
> idProduct attributes
> Without these numbers the "device auto" directive did not work.
>
> * I had to create the /var/lock/sane directory with correct permissions;
> it is missing and without it, the driver says something about "error
> -11, lock failed"
>
> HTH
>         Andreas
> --
>        ("`-''-/").___..--''"`-._
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>
> Andreas Tscharner   a...@stupidmail.ch   ICQ-No. 14356454
>
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