After using a rather old Canon scanner for many years,
I recently upgraded to the Canon LiDE 300,
and installed the drivers as directed, on a Bullseye
system (10.2.0-17).
The printer is recognized:
$ scanimage -L
device `pixma:04A91913_47A8A4' is a CANON CanoScan LiDE
300 multi-function peripheral
When I run simple-scan, it detects the printer and
announces itself ready to go, but when I try
to scan anything, I get the message "Failed to scan
Unable to connect to scanner". I Googled for
anything related to this; there's a bunch of stuff on
Ubuntu and Mint forums about purging the
"ippusbxd" package, but this isn't on Debian.
I then ran simple-scan with the debug flag, and at the
moment I try to initiate a scan, I got:
[+20.83s] DEBUG: simple-scan.vala:1817: Requesting scan
at 150 dpi from device
scan_mode=ScanMode.GRAY, depth=2, type=single,
paper_width=0, paper_height=0, brightness=0,
contrast=0, delay=3000ms)
[+20.83s] DEBUG: scanner.vala:828: Processing request
SANE_STATUS_NO_MEM
[+20.83s] WARNING: scanner.vala:893: Unable to open
device: Out of memory
I'm not sure what could be going on, as I have a ton of
memory on my system.
I don't know why I tried this, but I then ran
simple-scan as root, and...it worked perfectly.
I'm bewildered by this--any idea what I should be
looking at?