Eu tenho um velho scanner Acer S2W 3300 U que eu costumava usar no Linux há dez anos. Tentei instalá-lo em uma caixa linux atualizada do Slackware64, mas o kernel não parece ser capaz de identificá-lo.
# uname -a
Linux leao 4.4.38 #2 SMP Sun Dec 11 16:11:02 CST 2016 x86_64 Intel(R) Xeon(R) CPU E3-1246 v3 @ 3.50GHz GenuineIntel GNU/Linux
# grep -v '^#' /etc/sane.d/snapscan.conf | head -6
firmware /usr/share/sane/snapscan/u176v046.bin
/dev/usb/scanner0 bus=usb
# ls -l /usr/share/sane/snapscan/u176v046.bin
-rwxr-xr-x 1 lupe lupe 31385 nov 12 00:44 /usr/share/sane/snapscan/u176v046.bin
# dmesg | tail
[ 452.508560] usb 1-13: unable to read config index 0 descriptor/start: -110
[ 452.508563] usb 1-13: can't read configurations, error -110
[ 452.661561] usb 1-13: new full-speed USB device number 12 using xhci_hcd
[ 457.825481] usb 1-13: unable to read config index 0 descriptor/start: -110
[ 457.825484] usb 1-13: can't read configurations, error -110
[ 457.978466] usb 1-13: new full-speed USB device number 13 using xhci_hcd
[ 462.990385] usb 1-13: unable to read config index 0 descriptor/start: -110
[ 462.990389] usb 1-13: can't read configurations, error -110
[ 463.143374] usb 1-13: new full-speed USB device number 14 using xhci_hcd
Posso ter alguma esperança de que isso funcione?