On Fri 08 Jan 2021 at 17:28:16 -0500, Jen Nussbaum wrote: > > 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 > device `escl:http://127.0.0.1:60000' is a Canon LiDE 300 (USB) flatbed scanner > > 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.
ippusbxd is certainly not on Debian but ipp-usb is. See the wiki. > 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 'escl:http://127.0.0.1:60000' > [+20.83s] DEBUG: scanner.vala:1683: Scanner.scan > ("escl:http://127.0.0.1:60000";, dpi=150, 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 > [+20.83s] DEBUG: scanner.vala:889: sane_open ("escl:http://127.0.0.1:60000";) > -> SANE_STATUS_NO_MEM > [+20.83s] WARNING: scanner.vala:893: Unable to open device: Out of memory Nothing about the pixma backend (driver)? > I'm not sure what could be going on, as I have a ton of memory on my > system. Just to confirm your experience, what happens with scanning with simple-scan "pixma:04A91913_47A8A4" and simple-scan "escl:http://127.0.0.1:60000"; > I don't know why I tried this, but I then ran simple-scan as root, > and...it worked perfectly. I do not understand why this should be so. Do both the previous commands work as root? > I'm bewildered by this--any idea what I should be looking at? Yes; there is a possible solution. Give what you get for lsusb -v | grep -A 3 bInterfaceClass.*7 and systemctl list-units "ipp-usb*" | grep service -- Brian.
