Re: [sane-devel] Canon LIDE 220

Tue, 30 Jun 2015 12:16:09 -0700 

On 30/06/2015 19:06, John Weber wrote:
I did 'make'. I wouldn't have backend/.libs/libsane-genesys.so otherwise, right? 
$ ls -l backend/.libs/libsane-genesys.so
lrwxrwxrwx 1 jweber jweber 25 Jun 30 08:25 backend/.libs/libsane-genesys.so -> libsane-genesys.so.1.0.25* 
$ ls -l backend/.libs/libsane-genesys.so.1.0.25
-rwxrwxr-x 1 jweber jweber 1446816 Jun 30 08:25 backend/.libs/libsane-genesys.so.1.0.25* 

John

On 06/30/2015 10:44 AM, m. allan noah wrote:

You still have to 'make'.

allan

On Tue, Jun 30, 2015 at 11:03 AM, John Weber <[email protected]> wrote:



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
instructions.

Thanks,

John


      Hello,

      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

level
      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





Hi Stef,

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

./configure --enable-avahi

and it ran with exit code 0.

After setting
export LD_PRELOAD=backend/.libs/libsane-genesys.so

Now both

./frontend/scanimage -L
/usr/bin/scanimage -L

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.

--
John Weber
[email protected]


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    Hello,


    to be precise, i ran tests from another directory with this kind of 
script attached. You need dll.conf and genesys.conf to be present in 
this test directory. You'll have to tweak the source path in it.


Regards,
    Stef



#!/bin/bash
#======================================================
export SANE_DIR=/home/stefdev/git/sane-backends
export BIN_DIR=$SANE_DIR/frontend
export SO_DIR=$SANE_DIR/backend/.libs
#export SANE_DEBUG_GENESYS=255
export SANE_DEBUG_GENESYS_LOW=7
#export SANE_DEBUG_GENESYS_GL646=255
#export SANE_DEBUG_GENESYS_GL841=255
#export SANE_DEBUG_GENESYS_GL843=255
#export SANE_DEBUG_GENESYS_GL847=255
#export SANE_DEBUG_GENESYS_GL124=255
#export SANE_DEBUG_SANEI_USB=255
#export SANE_DEBUG_SANEI_MAGIC=255
export LD_PRELOAD=$SO_DIR/libsane-genesys.so
$BIN_DIR/scanimage -d genesys --resolution 75 --preview --mode Color 2>rl.log 
>rl.pnm

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