[sane-devel] Unsupported device: Canon MF4018

[Steve Hardy]

Hi,

I have similar problems to this with the pixma backend and a Canon MF4660 -
only my MFP *always* returns the -ETIMEOUT response after moving the scan
head to the end of the panel in preparation for the scan.

It looks like the backend is sending something to the scanner which puts it
into a weird state, as I have to power-cycle to make it work again
(unplugging is not enough, if I run scanimage -T, then plug into a Windows
box it stil wont work)

I have not had sufficient time available to properly investigate what's
happening, but it does look like a similar problem so thought it may be
worth mentioning.

I will try diffing the scan snoop from windows with what's happening under
Linux later, but I've not yet found a quick/easy way to do this.

Steve


The only problem is that sometimes scanner gets hang and 'scanimage -T'
> fails:
> scanimage: reading one scanline, 1920 bytes...  FAIL Error: Error during
> device I/O
>
> More detailed (with SANE_DEBUG_PIXMA=21):
>
> $ scanimage -T
> [sanei_debug] Setting debug level of pixma to 21.
> [pixma] pixma version 0.15.0
> [pixma] pixma_collect_devices() found Canon imageCLASS MF4010 at
> libusb:001:004
> [pixma] sanei_bjnp_find_devices:
> [pixma] lo is not a valid IPv4 interface, skipping...
> [pixma] eth0 is not a valid IPv4 interface, skipping...
> [pixma] lo is not a valid IPv4 interface, skipping...
> [pixma] eth0 is IPv4 capable, sending broadcast..
> [pixma] scanner discovery finished...
> [pixma] pixma_find_scanners() found 1 devices
> [pixma] pixma_collect_devices() found Canon imageCLASS MF4010 at
> libusb:001:004
> [pixma] sanei_bjnp_find_devices:
> [pixma] lo is not a valid IPv4 interface, skipping...
> [pixma] eth0 is not a valid IPv4 interface, skipping...
> [pixma] lo is not a valid IPv4 interface, skipping...
> [pixma] eth0 is IPv4 capable, sending broadcast..
> [pixma] scanner discovery finished...
> [pixma] pixma_open(): Canon imageCLASS MF4010
> [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]   dpi=75x75 offset=(0,0) dimension=640x877
> [pixma]   gamma_table=0x828741c source=0
> [pixma] Reader task id=9082 (forked)
> scanimage: scanning image of size 640x877 pixels at 24 bits/pixel
> scanimage: acquiring RGB frame, 8 bits/sample
> scanimage: reading one scanline, 1920 bytes...  [pixma] raw_width = 640
> [pixma] OUT  T=3.345 len=10
> [pixma]  00000000:f3 20 00 00 00 00 00 00  0c 00
> [pixma]
> [pixma] IN   T=4.353 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 8 sec.
> [pixma] IN   T=5.359 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 7 sec.
> [pixma] IN   T=6.366 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 6 sec.
> [pixma] IN   T=7.373 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 5 sec.
> [pixma] IN   T=8.380 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 4 sec.
> [pixma] IN   T=9.386 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 3 sec.
> [pixma] IN   T=10.394 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 2 sec.
> [pixma] IN   T=11.400 len=-9
> [pixma]   ERROR: ETIMEDOUT
> [pixma]
> [pixma] No response yet. Timed out in 1 sec.
> [pixma] WARNING:Error in response phase. cmd:c0dd
> [pixma]   If the scanner hangs, reset it and/or unplug the USB cable.
> [pixma] pixma_scan() failed ETIMEDOUT
> [pixma] read_image():reader task closed the pipe:0 bytes received,
> 1683840 bytes expected
> [pixma] Reader task terminated: ETIMEDOUT
> FAIL Error: Error during device I/O
> [pixma] pixma_close(): Canon imageCLASS MF4010
>
>
> In this case, resetting scanner or unplugging USB cable helps.
>
>
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