[sane-devel] HP 3055 crash on sane_close

[tobias alarcon]

Hi,

I'm working with a hp 3055 all-in-one. It?s works fine
but when i call sane_close()  for third time i get a sigsegv
also happen when sane_start() return SANE_STATUS_DEVICE_BUSY
and then i try to close the device.

this is the output

*** glibc detected *** /home/tobias/main : munmap_chunk(): invalid
pointer: 0xb74e7502 ***
=== Backtrace: =
/lib/i686/libc.so.6(cfree+0x1bb)[0xb741513b]
/usr/lib/sane/libsane-hpaio.so.1(sane_hpaio_close+0xdf)[0xb578f09f]

any help will be appreciated.
Tobias

[sane-devel] HP 3055 crash on sane_close

[m. allan noah]

sorry, we do not provide the hpaio backend- ask the authors at the
hplip project.

allan

On Mon, Mar 10, 2008 at 9:28 AM, tobias alarcon extobias at gmail.com wrote:
 Hi,

  I'm working with a hp 3055 all-in-one. It?s works fine
  but when i call sane_close()  for third time i get a sigsegv
  also happen when sane_start() return SANE_STATUS_DEVICE_BUSY
  and then i try to close the device.

  this is the output

  *** glibc detected *** /home/tobias/main : munmap_chunk(): invalid
  pointer: 0xb74e7502 ***
  === Backtrace: =
  /lib/i686/libc.so.6(cfree+0x1bb)[0xb741513b]
  /usr/lib/sane/libsane-hpaio.so.1(sane_hpaio_close+0xdf)[0xb578f09f]

  any help will be appreciated.
  Tobias
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-- 
The truth is an offense, but not a sin

[sane-devel] Canon LiDE 90

[Guillaume Gastebois]

Hello,


 What about only setting register 0x7f? that one should do something
 without needing to setup reg 0x1a.

Not better I think. Result : 
http://ggastebois.free.fr/lide90_snoop/10_test0.tar
 
 I didn't expect reg[0x1a]=0x24 to work without setting the corresponding
 clock bit masks. What happens if you leave line 1159 commented and set
 regs 0x74-0x7d(my guess: works without changes in behaviour)? Does
 setting regs 0x71-0x73 change anything (line 1159 still commented)?
 
Result of setting only 0x75 0x76 0x79 0x7c 0x7d (not 0x7f) : 
http://ggastebois.free.fr/lide90_snoop/10_test1.tar

Result of setting 0x71 0x72 0x73 0x75 0x76 0x79 0x7c 0x7d (not 0x7f) :
http://ggastebois.free.fr/lide90_snoop/10_test2.tar

 (I have only little understanding of the actual relative timing and use
 of all clock signals going out to the ccd/afe, so i am guessing and
 doing experiments.)
 
 But this seems to be basically working. Please send your changes leading
 to a usable scan, so i can integrate them.
For now, my code is ugly. I only modified lide60 to lide90. But you can 
find genesys_gl841.c and genesys_devices.c in 
http://ggastebois.free.fr/lide90_snoop/sources

 Another thing : when I make several scan with sane backend and sane 
 command line, I have alternatively brite and dark images !!! Why ???
 The calibration is probably giving widely differing results with
 different starting conditions. It swings between two states. But you
 shouldn't see this after the gl842 did its shading correction. Then, the
 problem is probably overexposure of the ccd cells. Try reducing the
 upper threshold in genesys_gl841.c:4383

 if (avge  2000) {
 expr = (expr * 2000) / avge;
 expg = (expg * 2000) / avge;
 expb = (expb * 2000) / avge;

 Reducing the lower threshold may be needed, too. The current values for
 your scanner are:
 expr: 1235
 expg: 1235
 expb: 675

 No guarantee that this helps at all.
I tryed that (upper threshold to 1500 and lower to 250 and it doesn't 
work. You can find the same test as test2 without the same result on : 
http://ggastebois.free.fr/lide90_snoop/10_test2b.tar (I just make two 
consecutive scanimage without recompiling sane).

One other thing : we can see vertical lines with different contrast on 
result images. What is it ?

Regards
Guillaume