$ scanimage -T
[sanei_debug] Setting debug level of pixma to 3.
[pixma] pixma is compiled without pthread support.
[pixma] pixma version 0.17.2
[sanei_debug] Setting debug level of bjnp to 2.
[bjnp] sanei_bjnp_find_devices:
[bjnp] wlan0 is IPv4 capable, sending broadcast, socket = 3
[bjnp] wlan0 is IPv6 capable, sending broadcast, socket = 4
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Scanner not yet in our list, added it: 9C74A1000000.local:8612
[bjnp] Scanner identity string = MFG:Canon;CMD:MultiPass 2.1,IVEC;MDL:MX710 series;CLS:IMAGE;DES:Canon MX710 series;SOJ:BJNP2,BJNPe; - lenght = 99
[bjnp] Scanner model = MX710 series
[pixma] Scanner model found: Name MX710(Canon PIXMA MX710 Series) matches MX710 series
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Scanner at bjnp://9C74A1000000.local:8612 was added before, good!
[pixma] pixma_collect_devices() found Canon PIXMA MX710 Series at bjnp://9C74A1000000.local:8612
[pixma] pixma_find_scanners() found 1 devices
[bjnp] sanei_bjnp_find_devices:
[bjnp] wlan0 is IPv4 capable, sending broadcast, socket = 3
[bjnp] wlan0 is IPv6 capable, sending broadcast, socket = 4
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Scanner not yet in our list, added it: 9C74A1000000.local:8612
[bjnp] Scanner identity string = MFG:Canon;CMD:MultiPass 2.1,IVEC;MDL:MX710 series;CLS:IMAGE;DES:Canon MX710 series;SOJ:BJNP2,BJNPe; - lenght = 99
[bjnp] Scanner model = MX710 series
[pixma] Scanner model found: Name MX710(Canon PIXMA MX710 Series) matches MX710 series
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] Scanner at bjnp://9C74A1000000.local:8612 was added before, good!
[pixma] pixma_collect_devices() found Canon PIXMA MX710 Series at bjnp://9C74A1000000.local:8612
[pixma] pixma_open(): Canon PIXMA MX710 Series
[bjnp] sanei_bjnp_open(bjnp://9C74A1000000.local:8612, -1222139728):
[bjnp] Forward lookup for 9C74A1000000.local succeeded, using as hostname
[bjnp] sanei_bjnp_activate (0)
[bjnp] sanei_bjnp_deactivate (0)
[pixma] Reader task id=11623 (forked)
scanimage: scanning image of size 638x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame, 8 bits/sample
scanimage: reading one scanline, 1914 bytes...	[pixma] Reader task started
[bjnp] sanei_bjnp_activate (0)
[pixma] 
[pixma] pixma_scan(): start
[pixma]   line_size=1914 image_size=1678578 channels=3 depth=8
[pixma]   dpi=75x75 offset=(0,0) dimension=638x877
[pixma]   gamma_table=0x85c2e10 source=0
[pixma]   threshold=127 threshold_curve=0
[pixma]   ADF page count: 0
[bjnp] bjnp_set_timeout to 20000
[bjnp] bjnp_write_bulk(0, bufferptr, 0x120 = 288)
[bjnp] bjnp_set_timeout to 20000
[bjnp] bjnp_read_bulk(0, bufferptr, 0x400 = 1024)
[pixma] pixma_scan() failed EPROTO
[bjnp] sanei_bjnp_deactivate (0)
[pixma] read_image():reader task closed the pipe:0 bytes received, 1678578 bytes expected
[pixma] Reader task terminated: EPROTO
FAIL Error: Error during device I/O
[pixma] pixma_close(): Canon PIXMA MX710 Series
[bjnp] sanei_bjnp_close(0):
[bjnp] sanei_bjnp_deactivate (0)