[sane-devel] Using "scanimage" under Gentoo
louis at fazant.net
Fri Feb 14 13:39:03 GMT 2020
to get an indication where the issue is: can you please repeat the same
tests with USB connection? That ill help decide if the issue is in the
backend proper of the BJNP code....
On Fri, 2020-02-14 at 14:28 +0100, Dr Rainer Woitok wrote:
> I promised to run tests using the current version of "sane-backends"
> well as my Canon Pixma scanner. I used a three sheets, six pages
> original and scanned with "--source 'ADF Duplex'":
> Test 1: Run with "export SANE_DEBUG_BJNP=127". After scanning the
> page successfully, the scanner started to pull in the last
> before the second sheet was completely moved out of the way,
> sulting in the scanner's hard- or firmware pulling some sort
> emergency brake and stopping the scan.
> Test 2: To see whether this was just the debog-output getting in the
> I did this test WITHOUT specifying "export
> This time the scanner totally "forgot" to scan the reverse
> of the second sheet, immediately scanned the last
> sheet, and
> then claimed the scan to having been successful. Sorry, no
> bug data available :-(
> Test 3: Again with "export SANE_DEBUG_BJNP=127". This test did
> six correct page images without throwing any errors.
> Test 4: Again with "export SANE_DEBUG_BJNP=127". This test, too,
> produce six correct page images without throwing any errors.
> Test 5: Without exporting "SANE_DEBUG_BJNP". Ran successfully.
> So two out of five tests failed, and they failed in different ways,
> icating that there might be still timing or communication problems.
> I've compressed the debug output from tests 1 and 3, but the files
> still huge:
> $ ls -l *.bz2
> -rw------- 1 rainer rainer 28659462 2020-02-14 13:35
> -rw------- 1 rainer rainer 56919612 2020-02-14 13:37
> As per your suggestions I'll send these files in two separate mails
> attachments to both, yourself and the list and will leave it to the
> moderator to decide.
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