That message implies a kernel or libusb bug. Do you see any errors around that time when you run dmesg?
allan On Sat, Jun 18, 2016 at 3:47 PM, Maarten Hoogendoorn <maar...@moretea.nl> wrote: > Hi all, > > I've some problems with my ADF scanner. It's a Canon DR-2580C. > > Scanning works fine, as in: the pnm files get created and contain valid > content, but scanimage does not terminate! It hangs after the following > warning: > > libusb: warning [libusb_close] internal signalling write failed, closing > anyway > > Some background information: > > I'm running nixos-unstable. > > $ scanimage -V > scanimage (sane-backends) 1.0.25git; backend version 1.0.25 > > $ scanimage -L > device `v4l:/dev/video0' is a Noname Integrated Camera virtual device > device `canon_dr:libusb:003:013' is a CANON DR-2580C scanner > > $ cat /sys/bus/usb/devices/3-2.2/power/control > on > > ==> I don't believe that this is cause by usb autosuspend > > Furthermore, I had the scanner connected directly to my Thinkpad's USB port > > $ SANE_DEBUG_CANON_DR=30 scanimage -d 'canon_dr:libusb:003:013' > --resolution=300 > 2580-1.pnm 2>2580-1.log > > This just hangs. The 2580-1.log can be found in [1], but I have included the > last few lines of the log below: > > [canon_dr] sane_cancel: finish > [canon_dr] sane_close: start > [canon_dr] disconnect_fd: start > [canon_dr] disconnecting usb device > libusb: warning [libusb_close] internal signalling write failed, closing > anyway > > Do you have any clue what might be the problem? > > Thanks, > Maarten > > [1] http://maarten-hoogendoorn.nl/public-uploads/sane/2580-1.log > > -- > 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 -- "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
