여기서도 같은 문제가 발생했습니다. 때로는 작동하다가 다음 검사 중에 오류 메시지와 함께 중지되는 경우도 있습니다.

[bjnp] bjnp_open_tcp: ERROR - Can not connect to scanner: Connection refused
scanimage: sane_read: Invalid argument

# ss  -tulpn | grep :6566
tcp     LISTEN   0        128                    *:6566                 *:*      users:(("systemd",pid=1,fd=160)) 

많은 것을 시도했습니다:

• systemctl을 통해 비활성화, 활성화, 중지, 시작 및 다시 시작;
• apt를 통해 정리, 삭제, 설치, 재설치;
• dpkg-reconfigure를 통해 재구성합니다.
• 최신 백엔드를 다운로드, 컴파일 및 설치합니다.

systemctl 제정신 중지

# saned -d -a saned
[saned] saned (AF-indep+IPv6) from sane-backends 1.0.27 starting up
[saned] do_bindings: [0] bind failed: Address already in use
[saned] Now daemonized

# systemctl disable saned.socket 
Removed /etc/systemd/system/sockets.target.wants/saned.socket.
# saned -d -a saned
[saned] saned (AF-indep+IPv6) from sane-backends 1.0.27 starting up
[saned] do_bindings: [1] bind failed: Address already in use
[saned] do_bindings: [0] bind failed: Address already in use
[saned] do_bindings: couldn't bind an address. Exiting.
[saned] FATAL ERROR; bailing out, waiting for children...
[saned] bail_out: all children exited
# ps ax | grep inet
23794 pts/7    S+     0:00 grep inet
32284 ?        Ss     0:01 /usr/sbin/inetd
# kill 32284
# ps ax | grep inet
23961 pts/7    S+     0:00 grep inet
# saned -d -a saned
[saned] saned (AF-indep+IPv6) from sane-backends 1.0.27 starting up
[saned] do_bindings: [1] bind failed: Address already in use
[saned] do_bindings: [0] bind failed: Address already in use
[saned] do_bindings: couldn't bind an address. Exiting.
[saned] FATAL ERROR; bailing out, waiting for children...
[saned] bail_out: all children exited
# systemctl enable saned
saned.service is not a native service, redirecting to systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable saned
# systemctl disable saned
saned.service is not a native service, redirecting to systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install disable saned
# systemctl enable saned.socket 
Created symlink /etc/systemd/system/sockets.target.wants/saned.socket → /etc/systemd/system/saned.socket.
# systemctl start  saned.socket 
Job for saned.socket failed.
See "systemctl status saned.socket" and "journalctl -xe" for details.
# systemctl status saned.socket
● saned.socket - saned incoming socket
   Loaded: loaded (/etc/systemd/system/saned.socket; enabled; vendor preset: enabled)
   Active: failed (Result: resources)
   Listen: [::]:6566 (Stream)
 Accepted: 0; Connected: 0;

Mai 12 09:29:41 monster systemd[1]: saned.socket: Failed to receive listening socket ([::]:6566): Input/output error
Mai 12 09:29:41 monster systemd[1]: saned.socket: Failed to listen on sockets: Input/output error
Mai 12 09:29:41 monster systemd[1]: saned.socket: Failed with result 'resources'.
Mai 12 09:29:41 monster systemd[1]: Failed to listen on saned incoming socket.

# ss  -tulpn | grep :6566
tcp     LISTEN   0        1                      *:6566                 *:*      users:(("saned",pid=22068,fd=3)) 

이 명령을 루트로 실행하는 사이에 다른 터미널에서 일반 사용자로 scanimage를 사용하여 스캔을 시도했습니다.

이제 일부 프로세스가 완료될 때까지 기다린 후 다시 시작하세요.

제거하여 다시 작업하게 되었습니다.모든 것sane-airscan과 관련이 있습니다. apt purge sane-airscan, systemctl stop saned.service&를 systemctl stop saned.socket누른 후 다음을 삭제하세요.

• /etc/defaults/sane
• /etc/init.d/saned
• /lib/systemd/system/saned.socket
• /lib/systemd/system/saned.service

재부팅한 후 다음을 통해 설치했습니다.

wget https://download.opensuse.org/repositories/home:/pzz/xUbuntu_18.04/amd64/sane-airscan_0.99.27-1+89.1_amd64.deb
dpkg -i sane-airscan_0.99.27-1+89.1_amd64.deb

root@laptop:~# export SANE_DEBUG_DLL=255 && scanimage -L 
[sanei_debug] Setting debug level of dll to 255.
[dll] sane_init: SANE dll backend version 1.0.13 from sane-backends 1.0.27
[dll] sane_init/read_dlld: attempting to open directory `./dll.d'
[dll] sane_init/read_dlld: attempting to open directory `/etc/sane.d/dll.d'
[dll] sane_init/read_dlld: using config directory `/etc/sane.d/dll.d'
[dll] sane_init/read_dlld: considering /etc/sane.d/dll.d/airscan
[dll] sane_init/read_config: reading dll.d/airscan
[dll] add_backend: adding backend `airscan'
[dll] sane_init/read_dlld: considering /etc/sane.d/dll.d/hplip
[dll] sane_init/read_config: reading dll.d/hplip
[dll] add_backend: adding backend `hpaio'
[dll] sane_init/read_dlld: done.
[dll] sane_init/read_config: reading dll.conf
[dll] add_backend: adding backend `net'
[dll] add_backend: adding backend `abaton'
[dll] add_backend: adding backend `agfafocus'
[dll] add_backend: adding backend `apple'
[dll] add_backend: adding backend `avision'
[dll] add_backend: adding backend `artec'
[dll] add_backend: adding backend `artec_eplus48u'
[dll] add_backend: adding backend `as6e'
[dll] add_backend: adding backend `bh'
[dll] add_backend: adding backend `canon'
[dll] add_backend: adding backend `canon630u'
[dll] add_backend: adding backend `canon_dr'
[dll] add_backend: adding backend `cardscan'
[dll] add_backend: adding backend `coolscan'
[dll] add_backend: adding backend `coolscan3'
[dll] add_backend: adding backend `dell1600n_net'
[dll] add_backend: adding backend `dmc'
[dll] add_backend: adding backend `epjitsu'
[dll] add_backend: adding backend `epson2'
[dll] add_backend: adding backend `epsonds'
[dll] add_backend: adding backend `fujitsu'
[dll] add_backend: adding backend `genesys'
[dll] add_backend: adding backend `gt68xx'
[dll] add_backend: adding backend `hp'
[dll] add_backend: adding backend `hp3900'
[dll] add_backend: adding backend `hpsj5s'
[dll] add_backend: adding backend `hp3500'
[dll] add_backend: adding backend `hp4200'
[dll] add_backend: adding backend `hp5400'
[dll] add_backend: adding backend `hp5590'
[dll] add_backend: adding backend `hpljm1005'
[dll] add_backend: adding backend `hs2p'
[dll] add_backend: adding backend `ibm'
[dll] add_backend: adding backend `kodak'
[dll] add_backend: adding backend `kodakaio'
[dll] add_backend: adding backend `kvs1025'
[dll] add_backend: adding backend `kvs20xx'
[dll] add_backend: adding backend `leo'
[dll] add_backend: adding backend `lexmark'
[dll] add_backend: adding backend `ma1509'
[dll] add_backend: adding backend `magicolor'
[dll] add_backend: adding backend `matsushita'
[dll] add_backend: adding backend `microtek'
[dll] add_backend: adding backend `microtek2'
[dll] add_backend: adding backend `mustek'
[dll] add_backend: adding backend `mustek_usb'
[dll] add_backend: adding backend `mustek_usb2'
[dll] add_backend: adding backend `nec'
[dll] add_backend: adding backend `niash'
[dll] add_backend: adding backend `pie'
[dll] add_backend: adding backend `pint'
[dll] add_backend: adding backend `pixma'
[dll] add_backend: adding backend `plustek'
[dll] add_backend: adding backend `qcam'
[dll] add_backend: adding backend `ricoh'
[dll] add_backend: adding backend `rts8891'
[dll] add_backend: adding backend `s9036'
[dll] add_backend: adding backend `sceptre'
[dll] add_backend: adding backend `sharp'
[dll] add_backend: adding backend `sm3600'
[dll] add_backend: adding backend `sm3840'
[dll] add_backend: adding backend `snapscan'
[dll] add_backend: adding backend `sp15c'
[dll] add_backend: adding backend `tamarack'
[dll] add_backend: adding backend `teco1'
[dll] add_backend: adding backend `teco2'
[dll] add_backend: adding backend `teco3'
[dll] add_backend: adding backend `u12'
[dll] add_backend: adding backend `umax'
[dll] add_backend: adding backend `umax1220u'
[dll] add_backend: adding backend `v4l'
[dll] add_backend: adding backend `xerox_mfp'
[dll] sane_get_devices
[dll] load: searching backend `xerox_mfp' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane:/usr/lib64/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-xerox_mfp.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-xerox_mfp.so.1'
...
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-agfafocus.so.1'
[dll] init: initializing backend `agfafocus'
[dll] init: backend `agfafocus' is version 1.0.0
[dll] load: searching backend `abaton' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane:/usr/lib64/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-abaton.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-abaton.so.1'
[dll] init: initializing backend `abaton'
[dll] init: backend `abaton' is version 1.0.0
[dll] load: searching backend `net' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane:/usr/lib64/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-net.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-net.so.1'
[dll] init: initializing backend `net'
[dll] init: backend `net' is version 1.0.27
[dll] load: searching backend `hpaio' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane:/usr/lib64/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-hpaio.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-hpaio.so.1'
[dll] init: initializing backend `hpaio'
[dll] init: backend `hpaio' is version 1.0.0
[dll] load: searching backend `airscan' in `/usr/lib/x86_64-linux-gnu/sane:/usr/lib/sane:/usr/lib64/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-airscan.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-airscan.so.1'
[dll] init: initializing backend `airscan'
[dll] init: backend `airscan' is version 1.0.0
[dll] sane_get_devices: found 1 devices
device `airscan:w0:Dell C1765nf Color MFP' is a WSD Dell C1765nf Color MFP ip=192.168.2.16
[dll] sane_exit: exiting
[dll] sane_exit: calling backend `xerox_mfp's exit function
[dll] sane_exit: calling backend `umax1220u's exit function
[dll] sane_exit: calling backend `umax's exit function
[dll] sane_exit: calling backend `u12's exit function
[dll] sane_exit: calling backend `teco3's exit function
[dll] sane_exit: calling backend `teco2's exit function
[dll] sane_exit: calling backend `teco1's exit function
[dll] sane_exit: calling backend `tamarack's exit function
[dll] sane_exit: calling backend `sp15c's exit function
[dll] sane_exit: calling backend `snapscan's exit function
[dll] sane_exit: calling backend `sm3840's exit function
[dll] sane_exit: calling backend `sm3600's exit function
[dll] sane_exit: calling backend `sharp's exit function
[dll] sane_exit: calling backend `sceptre's exit function
[dll] sane_exit: calling backend `s9036's exit function
[dll] sane_exit: calling backend `rts8891's exit function
[dll] sane_exit: calling backend `ricoh's exit function
[dll] sane_exit: calling backend `qcam's exit function
[dll] sane_exit: calling backend `plustek's exit function
[dll] sane_exit: calling backend `pixma's exit function
[dll] sane_exit: calling backend `pie's exit function
[dll] sane_exit: calling backend `niash's exit function
[dll] sane_exit: calling backend `nec's exit function
[dll] sane_exit: calling backend `mustek_usb2's exit function
[dll] sane_exit: calling backend `mustek_usb's exit function
[dll] sane_exit: calling backend `mustek's exit function
[dll] sane_exit: calling backend `microtek2's exit function
[dll] sane_exit: calling backend `microtek's exit function
[dll] sane_exit: calling backend `matsushita's exit function
[dll] sane_exit: calling backend `magicolor's exit function
[dll] sane_exit: calling backend `ma1509's exit function
[dll] sane_exit: calling backend `lexmark's exit function
[dll] sane_exit: calling backend `leo's exit function
[dll] sane_exit: calling backend `kvs20xx's exit function
[dll] sane_exit: calling backend `kvs1025's exit function
[dll] sane_exit: calling backend `kodakaio's exit function
[dll] sane_exit: calling backend `kodak's exit function
[dll] sane_exit: calling backend `ibm's exit function
[dll] sane_exit: calling backend `hs2p's exit function
[dll] sane_exit: calling backend `hpljm1005's exit function
[dll] sane_exit: calling backend `hp5590's exit function
[dll] sane_exit: calling backend `hp5400's exit function
[dll] sane_exit: calling backend `hp4200's exit function
[dll] sane_exit: calling backend `hp3500's exit function
[dll] sane_exit: calling backend `hpsj5s's exit function
[dll] sane_exit: calling backend `hp3900's exit function
[dll] sane_exit: calling backend `hp's exit function
[dll] sane_exit: calling backend `gt68xx's exit function
[dll] sane_exit: calling backend `genesys's exit function
[dll] sane_exit: calling backend `fujitsu's exit function
[dll] sane_exit: calling backend `epsonds's exit function
[dll] sane_exit: calling backend `epson2's exit function
[dll] sane_exit: calling backend `epjitsu's exit function
[dll] sane_exit: calling backend `dmc's exit function
[dll] sane_exit: calling backend `dell1600n_net's exit function
[dll] sane_exit: calling backend `coolscan3's exit function
[dll] sane_exit: calling backend `coolscan's exit function
[dll] sane_exit: calling backend `cardscan's exit function
[dll] sane_exit: calling backend `canon_dr's exit function
[dll] sane_exit: calling backend `canon630u's exit function
[dll] sane_exit: calling backend `canon's exit function
[dll] sane_exit: calling backend `bh's exit function
[dll] sane_exit: calling backend `artec_eplus48u's exit function
[dll] sane_exit: calling backend `artec's exit function
[dll] sane_exit: calling backend `avision's exit function
[dll] sane_exit: calling backend `apple's exit function
[dll] sane_exit: calling backend `agfafocus's exit function
[dll] sane_exit: calling backend `abaton's exit function
[dll] sane_exit: calling backend `net's exit function
[dll] sane_exit: calling backend `hpaio's exit function
[dll] sane_exit: calling backend `airscan's exit function
[dll] sane_exit: finished

보시다시피 내 Dell 올인원 PC가 발견되었습니다. device airscan:w0:Dell C1765nf Color MFP' is a WSD Dell C1765nf Color MFP ip=192.168.2.16