Re: simple-scan fails with Canon LiDE 300--except as root

[Brian <ad44@cityscape.co.uk>]

On Sat 09 Jan 2021 at 12:55:07 +0000, Dr. Jennifer Nussbaum wrote:

>  
>    > On Saturday, January 9, 2021, 07:43:41 AM EST, Brian <ad44@cityscape.co.uk> wrote: > > On Sat 09 Jan 2021 at 12:31:43 +0000, Dr. Jennifer Nussbaum wrote:
> >
> > >  On Saturday, January 9, 2021, 07:19:39 AM EST, Brian <ad44@cityscape.co.uk> wrote:
> >  >
> >  > > Install sane-airscan and give
> > > >
> > > > scanimage -L
> > > $ scanimage -L> > device `pixma:04A91913_47A8A4' is a CANON CanoScan LiDE 300 multi-function peripheraldevice `escl:http://127.0.0.1:60000' is a Canon LiDE 300 (USB) flatbed scannerdevice `airscan:e0:Canon LiDE 300 (USB)' is a eSCL Canon LiDE 300 (USB) ip=127.0.0.1
> > > > and
> > > >
> > > > airscan-discover
> > > $ airscan-discover > > [devices]  Canon LiDE 300 (USB) = http://127.0.0.1:60000/eSCL/, eSCL
> > > When I try to run simple-scan now, it's the same result as before; debug shows the airscan, but I still get the out-of-memory error.
> > > Thank you for sticking with this.
> >
> > How do you go on with
> >
> >  simple-scan "airscan:e0:Canon LiDE 300 (USB)" ?
> This works. (As it did when we specified the "pixma" interface.)

Thanks. I still do not understand how the pixma backend can work.
ipp-usb has control of USB; pixma should be unable to access the USB
bus.

Can you scan by choosing airscan, eSCL (note the lower case e), from
simple-scan's drop-down menu.

> > Would you also try
> >
> >  xsane "airscan:e0:Canon LiDE 300 (USB)">
> > and
> >
> >  xsane ?
> I don't have xsane installed. Is that just for background info? I've
> used it in the past, and always foundit far too complicated to bother
> with.

You can always remove it afterwards, but I wanted to know which of
the options it offers work. A preview is enough to do.

-- 
Brian.