Canon Pixma G4511 (G4010) only reports "device busy"
Trying to scan from my printer/scanner Canon Pixma G4511, connected via USB, only aborts with a "device busy" reply. Printing has always been fine and worked out of the box. I did not install any Canon drivers. The system is Ubuntu 20.04.2 LTS.
Any help appeciated.
> scanimage -L
device `pixma:04A9183D' is a CANON Canon PIXMA G4010 Series multi-function peripheral
device `escl:http://127.0.0.1:60000' is a ESCL G4010 series flatbed scanner
> SANE_DEBUG_SANEI_USB=50 SANE_DEBUG_PIXMA=50 scanimage -d "pixma:04A9183D" -T
(Note: Hundreds of lines related to other USB devices not shown.)
Output format is not set, using pnm as a default.
[sanei_debug] Setting debug level of pixma to 50.
[pixma] pixma is compiled with pthread support.
[pixma] pixma version 0.27.0
[pixma] pixma_collect_devices() found Canon PIXMA G4010 Series at libusb:001:002
[pixma] pixma_open(): Canon PIXMA G4010 Series
[sanei_usb] sanei_usb_open: trying to open device `libusb:001:002'
[sanei_usb] sanei_usb_open: libusb complained: Resource busy
[sanei_usb] Maybe the kernel scanner driver claims the scanner's interface?
[pixma] pixma_connect() failed EBUSY
[pixma] pixma_open() failed EBUSY
[pixma] pixma_close(): Canon PIXMA G4010 Series
scanimage: open of device pixma:04A9183D failed: Device busy
> scanimage -V
scanimage (sane-backends) 1.0.29; backend version 1.0.29