On Thu, Nov 29, 2012 at 11:34:08AM +0900, Gernot Hassenpflug wrote: > On Thu, Nov 29, 2012 at 2:43 AM, Henry Ptasinski <henry at logout.com> wrote: > > On 11/28/2012 09:38 AM, Henry Ptasinski wrote: > >> > >> Flatbed scans with resolutions up to 600 dpi all seem to be working > >> fine. At 1200 and 2400 dpi, the images are mangled. Columns appear to > >> be interleaved at both resolutions. I assume the problem is due to a > >> missing check in pixma_mp150.c:post_process_image_data(). Any > >> suggestions for how to start fixing this issue? > > > Hello Henry, > Yes, that is the correct solution. We know by now that many newer > devices require this exception, but we will only add the exception > when someone reports it, as that is the only sure way to tell. > Thank you for bringing this to our attention. Nice to know that both > 1200 and 2400 work without extra image data manipulation necessary > too.
I've sent a patch for this issue to the list, so hopefully that can be included shortly. Any thoughts on the timeout issue? Simply changing the timeout value in wait_until_ready() seems like a hack. Also, it doesn't solve all of the starup issues - if the printer has been sitting for quite a while unused, other errors show up: [sanei_debug] Setting debug level of pixma to 3. [pixma] pixma is compiled without pthread support. [pixma] Could not read pixma configuration file: pixma.conf [pixma] pixma version 0.17.0 [pixma] pixma_collect_devices() found Canon PIXMA MX890 Series at libusb:003:002 [pixma] sanei_bjnp_find_devices: [pixma] wlan1 is IPv4 capable, sending broadcast, socket = 3 [pixma] wlan1 is IPv6 capable, sending broadcast, socket = 4 [pixma] pixma_open(): Canon PIXMA MX890 Series [pixma] Reader task id=2867 (forked) [pixma] Reader task started [pixma] [pixma] pixma_scan(): start [pixma] line_size=1329 image_size=588747 channels=3 depth=8 [pixma] dpi=150x150 offset=(0,0) dimension=443x443 [pixma] gamma_table=0x25a90b8 source=0 [pixma] threshold=127 threshold_curve=0 [pixma] pixma_scan() failed EPROTO [pixma] Reader task terminated: EPROTO [pixma] read_image():reader task closed the pipe:0 bytes received, 588747 bytes expected scanimage: sane_read: Error during device I/O [pixma] pixma_close(): Canon PIXMA MX890 Series This proto failure seems to go away after the printer has some time to wake up, at which point the wait_until_ready() value seems to come into play. Likely unrelated, I'm using the -d flag to scanimage, so why is sanei_bjnp_find_devices() still sending out discovery messages over the network? Thanks, --- Henry Ptasinski henry at logout.com
