Here is a log:
export SANE_DEBUG_PIXMA=255
/var/mod/root # scanimage -v
[sanei_debug] Setting debug level of pixma to 255.
[pixma] pixma version 0.15.0
[pixma] pixma_collect_devices() found Canon imageCLASS MF3110 at
libusb:001:009
[pixma] sanei_bjnp_find_devices:
[pixma] Added all configured scanners, now do auto detection...
[pixma] Select returned, time left 0.500000....
[pixma] Discover response:
[pixma] 00000000:42 4a 4e 50 02 01 00 00 00 00 00 00 00 00 00 00
[pixma] Select returned, time left 1.0....
[pixma] Discover response:
[pixma] 00000000:42 4a 4e 50 02 01 00 00 00 00 00 00 00 00 00 00
[pixma] Select returned, time left 1.0....
[pixma] Discover response:
[pixma] 00000000:42 4a 4e 50 02 01 00 00 00 00 00 00 00 00 00 00
[pixma] scanner discovery finished...
[pixma] pixma_find_scanners() found 1 devices
[pixma] pixma_collect_devices() found Canon imageCLASS MF3110 at
libusb:001:009
[pixma] sanei_bjnp_find_devices:
[pixma] Added all configured scanners, now do auto detection...
[pixma] Select returned, time left 0.500000....
[pixma] Discover response:
[pixma] 00000000:42 4a 4e 50 02 01 00 00 00 00 00 00 00 00 00 00
[pixma] Select returned, time left 1.0....
[pixma] Discover response:
[pixma] 00000000:42 4a 4e 50 02 01 00 00 00 00 00 00 00 00 00 00
[pixma] Select returned, time left 1.0....
[pixma] Discover response:
[pixma] 00000000:42 4a 4e 50 02 01 00 00 00 00 00 00 00 00 00 00
[pixma] scanner discovery finished...
[pixma] pixma_open(): Canon imageCLASS MF3110
[pixma] Trying to clear the interrupt buffer...
[pixma] no packets in buffer
[pixma] Reader task started
[pixma]
[pixma] pixma_scan(): start
[pixma] line_size=1920 image_size=1683840 channels=3 depth=8
[pixma] [pixma] Reader task id=1026 (threaded)
scanimage: scanning image of size 640x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame
P6
# SANE data follows
640 877
255
dpi=75x75 offset=(0,0) dimension=640x877
[pixma] gamma_table=0x4221c4 source=0
[pixma] raw_width = 640
[pixma] OUT T=3.550 len=10
[pixma] 00000000:f3 20 00 00 00 00 00 00 0c 00
[pixma]
[pixma] IN T=3.556 len=14
[pixma] 00000000:06 06 03 01 00 41 03 00 41 00 00 00 00 77
[pixma]
[pixma] Current status: paper=1 cal=0 lamp=0
[pixma] Current status: paper=1 cal=0 lamp=0
[pixma] OUT T=3.557 len=20
[pixma] 00000000:cf 60 00 00 00 00 00 00 0a 00 01 00 00 00 00 00
[pixma] 00000010:00 00 00 ff
[pixma]
[pixma] IN T=3.573 len=2
[pixma] 00000000:06 06
[pixma]
[pixma] OUT T=3.576 len=20
[pixma] 00000000:cf 60 00 00 00 00 00 00 0a 00 01 00 00 04 00 00
[pixma] 00000010:00 00 00 fb
[pixma]
[pixma] IN T=3.587 len=2
[pixma] 00000000:06 06
[pixma]
[pixma] OUT T=3.597 len=10
[pixma] 00000000:db 20 00 00 00 00 00 00 00 00
[pixma]
[pixma] IN T=3.653 len=2
[pixma] 00000000:06 06
[pixma]
[pixma] OUT T=3.662 len=20
[pixma] 00000000:dd 20 00 00 00 00 00 00 0a 00 01 00 00 00 00 00
[pixma] 00000010:00 00 00 ff
[pixma]
[pixma] IN T=3.672 len=2
[pixma] 00000000:06 06
[pixma]
[pixma] OUT T=3.694 len=56
[pixma] 00000000:de 20 00 00 00 00 00 00 2e 00 00 00 00 00 10 4b
[pixma] 00000010:10 4b 00 00 00 00 00 00 00 00 00 00 02 80 00 00
[pixma] 00000020:03 6d 08 18 00 00 00 00 00 7f ff 00 00 81 00 00
[pixma] 00000030:00 00 00 00 00 00 00 39
[pixma]
[pixma] IN T=3.723 len=2
[pixma] 00000000:06 06
[pixma]
[pixma] OUT T=3.724 len=11
[pixma] 00000000:d4 20 00 00 00 00 00 00 00 00 06
[pixma]
[pixma] IN T=13.733 len=-9
[pixma] ERROR: ETIMEDOUT
[pixma]
[pixma] No response yet. Timed out in 8 sec.
[pixma] IN T=23.735 len=-9
[pixma] ERROR: ETIMEDOUT
[pixma]
[pixma] No response yet. Timed out in 7 sec.
[pixma] IN T=33.745 len=-9
[pixma] ERROR: ETIMEDOUT
[pixma]
[pixma] No response yet. Timed out in 6 sec.
[pixma] IN T=43.756 len=-9
[pixma] ERROR: ETIMEDOUT
[pixma]
[pixma] No response yet. Timed out in 5 sec.
