After a bit of searching, this looks like a bug in libusb-compat: http://sourceforge.net/p/libusbx/mailman/libusbx-devel/thread/522af646.7060...@redhat.com/
allan On Fri, Aug 7, 2015 at 6:21 PM, m. allan noah <kitno...@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 <r...@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" -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to sane-devel-requ...@lists.alioth.debian.org
