[sane-devel] Canon LIDE 220
jweber53 at gmail.com
Tue Jun 30 15:03:36 UTC 2015
On 06/29/2015 01:57 PM, Stef wrote:
> On 23/06/2015 16:08, John Weber wrote:
>> On 06/22/2015 10:40 PM, Stef wrote:
>> Hi Stef,
>>> Debug levels are defined like this for genesys_low:
>>> genesys_low.h:#define DBG_io 6 /* io functions */
>>> genesys_low.h:#define DBG_io2 7 /* io functions that are
>>> called very often */
>>> genesys_low.h:#define DBG_data 8 /* log image data */
>>> So if you get the problem at log level below seven, we must look at
>>> DBG_data usage in genesys_low.c . But here isn't on. So try 7 and 6 as
>>> debug levels. Once we know the exact kind of logging level that fix this
>>> timing issue, the next step is to remove this messages one by on until
>>> you find the one that makes difference. I haven't seen nothing obvious,
>>> so experimenting/testing is needed.
>>> sanei_genesys_wait_for_home(), sanei_genesys_set_buffer_address()
>>> and sanei_genesys_write_ahb functions() are printing messages in the
>>> middle of the code and are first candidates to try, in this order.
>> It works at debug level 7, but not 6. I'm not sure from the rest of
>> your answer if there's testing you want me to do, or if it's just
>> informational. I'm a retired sys admin/engineer but not much of a
>> programmer. I'm willing to test more, but I'll need more detailed
> I was expecting something like that.
> All DBG_io2 a mere traces, and I don't see how much they slow down
> things. Since I don't have this kind of problem on my hardware, I need
> your help. I don't see no other approach than trial and error.
> 1 - compile sources
> 2 - set logs to 7
> 3 - check that scanner is working with compiled sources and the log
> 4 - change a line where there is DBG_io2 level in DBG_data so it
> isn't traced any more, write down the line number
> 5 - compile and run, if it is still working, go to step 4 and
> change one more debug trace
> 6 - since it isn't working anymore, you have find where a pause
> must be set, please send it to me
> There are tutorials to build SANE from sources, one thing I like to
> do is to run the freshly compiled version without doing make install,
> when running scanimage from top source directory:
> export LD_PRELOAD=backends/.libs/libsane-genesys.so
I followed the first part of instructions at
https://help.ubuntu.com/community/CompileSaneFromSource just to get the
source and dependencies. Since I didn't plan on doing make install, per
your suggestion, I only used
and it ran with exit code 0.
report no scanners found. In another shell without LD_PRELOAD set,
/usr/bin/scanimage -L reports
device `genesys:libusb:001:020' is a Canon LiDE 220 flatbed scanner
as usual. ./frontend/scanimage -L still says no scanners found. I tried
all scanimage -L tests also with sudo, but it made no difference.
Should I use other configure options? Testing by trial and error won't
be too bad. It only took 80 secs to compile.
jweber53 at gmail.com
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