dpkg -i brscan2-0.2.5-1.amd64.debbrsaneconfig2 -d并回复:found USB scanner (vendor=0x04f9, product=0x0180) at libusb:003:002,但scanimage -L回复:No scanners were identified./lib/udev/rules.d/40-libsane.rules的信息,但是这个文件已经不在ubuntu20.04上了,所以我不知道如何跟进。root@ubuntu20:/home/usuario# scanimage --test
scanimage: open of device brother2:bus2;dev1 failed: Invalid argument
发布于 2021-11-30 22:43:50
root@ubuntu20:~# SANE_DEBUG_DLL=3 scanimage -L
[23:30:54.437751] [dll] load: searching backend `brother2' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane:/usr/lib64/sane'
[23:30:54.437770] [dll] load: dlopen()ing `/usr/lib64/sane/libsane-brother2.so.1'
[23:30:54.437995] [dll] load: dlopen() failed (libusb-0.1.so.4: cannot open shared object file: No such file or directory)所以libusb-0.1-4丢失了:apt-get install libusb-0.1-4
root@ubuntu20:~# scanimage -L
device `brother2:bus2;dev1' is a Brother MFC-7420 USB scannerhttps://askubuntu.com/questions/1378311
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