[sane-devel] Preparing for a sane-backends release

Fri Aug 7 22:29:55 UTC 2015

After a bit of searching, this looks like a bug in libusb-compat:
http://sourceforge.net/p/libusbx/mailman/libusbx-devel/thread/522AF646.7060108@redhat.com/

allan

On Fri, Aug 7, 2015 at 6:21 PM, m. allan noah <kitno455 at gmail.com> wrote:
> Rolf- can you get a log of the scanimage and xsane shutdown sequences,
> and see if they call something in a different order? I had one report
> of this same error with the Fujitsu iX500, but I never reproduced.
>
> allan
>
> On Fri, Aug 7, 2015 at 5:40 PM, Rolf Bensch <rolf at bensch-online.de> wrote:
>> Hello,
>>
>> I just fixed an usb communication problem with OpenSuse and the Pixma
>> backend.
>>
>> Scanning with xsane is working with my CS9000F scanner. But if I'm
>> scanning with scanimage, I always get this message at the end of each scan:
>> "libusb: warning [libusb_close] internal signalling read failed, closing
>> anyway"
>>
>> Then I need to terminate scanimage with 2x CTRL C. And sometimes the USB
>> bus is blocked for my scanner until I reboot the machine. The scanned
>> image is OK.
>>
>> I'm testing OpenSuse 13.2 in VirtualBox 5.0 on Ubuntu 14.04.1, both x86_64.
>>
>> Maybe you can give me a hint where to look to fix this issue or Allan
>> can fix this for me. I'm not very familiar with the usb library.
>>
>> Many thanks for your help.
>>
>> Cheers,
>> Rolf
>>
>> Am 04.08.2015 um 13:11 schrieb Johannes Meixner:
>>>
>>> Hello,
>>>
>>> On Aug 3 14:08 m. allan noah wrote (excerpt):
>>>> ... I know that Gentoo has some systemd compilation fixes.
>>>
>>> Everey Linux distribution should submit their patches to SANE
>>> upstream (provided their changes make sense for upstream).
>>>
>>> Here our (i.e. openSUSE) patches that we still have:
>>>
>>>
>>> 1)
>>> Right now I filed
>>> https://alioth.debian.org/tracker/index.php?group_id=30186&atid=410366
>>> with my fix-buffer-overflow.patch attached
>>> that fixes a too small array in backend/niash.c
>>>
>>>
>>> 2)
>>> My re-add-SANE_CAP_ALWAYS_SETTABLE.patch re-adds SANE_CAP_ALWAYS_SETTABLE
>>> to sane.h which was erroneously removed in sane-backends-1.0.20 so that
>>> sane-frontends and xsane can no longer build, see
>>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=527675
>>>
>>> re-add-SANE_CAP_ALWAYS_SETTABLE.patch
>>> -----------------------------------------------------------------------------
>>>
>>> --- include/sane/sane.h.orig    2009-06-12 10:19:19.000000000 +0200
>>> +++ include/sane/sane.h 2009-06-12 10:20:12.000000000 +0200
>>> @@ -115,6 +115,7 @@ SANE_Device;
>>>  #define SANE_CAP_AUTOMATIC             (1 << 4)
>>>  #define SANE_CAP_INACTIVE              (1 << 5)
>>>  #define SANE_CAP_ADVANCED              (1 << 6)
>>> +#define SANE_CAP_ALWAYS_SETTABLE       (1 << 7)
>>>
>>>  #define SANE_OPTION_IS_ACTIVE(cap)     (((cap) & SANE_CAP_INACTIVE)
>>> == 0)
>>>  #define SANE_OPTION_IS_SETTABLE(cap)   (((cap) &
>>> SANE_CAP_SOFT_SELECT) != 0)
>>> -----------------------------------------------------------------------------
>>>
>>>
>>> The re-add-SANE_CAP_ALWAYS_SETTABLE.patch still applies for
>>> current sane-backends-git20150804.tar.gz so that I assume
>>> SANE_CAP_ALWAYS_SETTABLE is still missing in sane-backends.
>>>
>>> I did not verify whether or not meanwhile all SANE frontends
>>> also no longer use SANE_CAP_ALWAYS_SETTABLE so that it could
>>> meanwhile be really removed in sane-backends.
>>>
>>>
>>> 3)
>>> My fix-mustek_pp_ccd300.c.patch fixes undefined 'foo = ++foo modulo bar'
>>> operations in mustek_pp_ccd300.c see
>>> https://bugzilla.opensuse.org/show_bug.cgi?id=498435
>>> and
>>> https://alioth.debian.org/tracker/index.php?func=detail&aid=311857&group_id=30186&atid=410366
>>> where the upstream maintainer did not understand what is wrong and
>>> closed it  as "Wont Fix" so that we must keep this patch forever
>>> to make at least the code somehow valid for the compiler.
>>> fix-mustek_pp_ccd300.c.patch is attached to the above
>>> alioth.debian.org bug tracker issue.
>>> Of course because the result of 'foo = ++foo' is undefined
>>> I cannot know if my patch implements what is actually intended.
>>> My patch implements an arbitrary result that only makes the
>>> compiler happy.
>>>
>>>
>>> 4)
>>> My install-umax_pp-tool.patch installs tools/umax_pp as /usr/bin/umax_pp
>>> which is built but not installed but it is needed to recover from
>>> a failed scan with scanners which use the umax_pp backend, see
>>> http://bugs.debian.org/496833
>>>
>>> install-umax_pp-tool.patch
>>> --------------------------------------------------------------------
>>> --- tools/Makefile.am.orig      2009-02-20 17:51:09.000000000 +0100
>>> +++ tools/Makefile.am   2009-06-05 15:08:45.000000000 +0200
>>> @@ -7,8 +7,8 @@
>>>  AM_CPPFLAGS = -I. -I$(srcdir) -I$(top_builddir)/include \
>>>   -I$(top_srcdir)/include
>>>
>>> -bin_PROGRAMS = sane-find-scanner gamma4scanimage
>>> -noinst_PROGRAMS = sane-desc umax_pp
>>> +bin_PROGRAMS = sane-find-scanner gamma4scanimage umax_pp
>>> +noinst_PROGRAMS = sane-desc
>>>
>>>  if CROSS_COMPILING
>>>  HOTPLUG =
>>> --------------------------------------------------------------------
>>>
>>> The install-umax_pp-tool.patch still applies for current
>>> sane-backends-git20150804.tar.gz so that I assume
>>> tools/umax_pp is still not installed by default.
>>>
>>>
>>>
>>> In general regarding parallel port scanner drivers:
>>>
>>> The above issues 3) and 4) are about parallel port scanner drivers.
>>>
>>> I wonder if support for parallel port scanners is still needed?
>>>
>>> I assume that basically nobody tests parallel port scanners.
>>> Probably also basically nobody usues parallel port scanners.
>>>
>>> In this case parallel port scanner drivers should be dropped
>>> because in practice they are no longer maintained.
>>>
>>> As a first step parallel port scanner drivers could be
>>> no longer built by default e.g. via something like
>>>   configure --without-parport
>>> by default.
>>>
>>>
>>> Kind Regards
>>> Johannes Meixner
>>
>>
>
>
>
> --
> "well, I stand up next to a mountain- and I chop it down with the edge
> of my hand"


-- 
"well, I stand up next to a mountain- and I chop it down with the edge
of my hand"