Ao usar o xsane, recebo uma imagem toda preta ao digitalizar. Eu também vejo isso no dmesg.
[1406230.387939] traps: xsane[17155] trap divide error ip:7f02f73e8bc8 sp:7fff0b4c44a0 error:0 in libsane-genesys.so.1.0.23[7f02f73a8000+61000]
[1406353.157940] traps: xsane[18372] trap divide error ip:7f61d73e8bc8 sp:7fff0ea9b050 error:0 in libsane-genesys.so.1.0.23[7f61d73a8000+61000]
[1406493.163511] traps: xsane[24989] trap divide error ip:7fb59a400bc8 sp:7fff9149a380 error:0 in libsane-genesys.so.1.0.23[7fb59a3c0000+61000]
[1406577.915599] traps: xsane[25108] trap divide error ip:7f3905110bc8 sp:7fff1d10d8a0 error:0 in libsane-genesys.so.1.0.23[7f39050d0000+61000]
[1406786.933920] traps: xsane[25150] trap divide error ip:7fba65328bc8 sp:7fff8d087a80 error:0 in libsane-genesys.so.1.0.23[7fba652e8000+61000]
Isso está usando xsane-0.998.