По форуму подобные темы просматривали? (1), (2)
Что/ какие пакеты уже устанавливали?
Какое подключение используете - USB, LAN, WLAN?
Зачастую доступность сканера проверяют командой:
$ scanimage -L
, например:
$ scanimage -L
device `plustek:libusb:006:002' is a Canon CanoScan LiDE25 flatbed scanner
, а таким образом можно протестировать устройство, например:
$ scanimage -T -d 'plustek:libusb:006:002'
Output format is not set, using pnm as a default.
scanimage: scanning image of size 202x150 pixels at 24 bits/pixel
scanimage: acquiring RGB frame, 8 bits/sample
scanimage: reading one scanline, 606 bytes... PASS
scanimage: reading one byte... PASS
scanimage: stepped read, 2 bytes... PASS
scanimage: stepped read, 4 bytes... PASS
scanimage: stepped read, 8 bytes... PASS
scanimage: stepped read, 16 bytes... PASS
scanimage: stepped read, 32 bytes... PASS
scanimage: stepped read, 64 bytes... PASS
scanimage: stepped read, 128 bytes... PASS
scanimage: stepped read, 256 bytes... PASS
scanimage: stepped read, 512 bytes... PASS
scanimage: stepped read, 1024 bytes... PASS
scanimage: stepped read, 1023 bytes... PASS
scanimage: stepped read, 511 bytes... PASS
scanimage: stepped read, 255 bytes... PASS
scanimage: stepped read, 127 bytes... PASS
scanimage: stepped read, 63 bytes... PASS
scanimage: stepped read, 31 bytes... PASS
scanimage: stepped read, 15 bytes... PASS
scanimage: stepped read, 7 bytes... PASS
scanimage: stepped read, 3 bytes... PASS