我的三星打印机停止工作了。我尝试将其从已安装的设备中删除，但由于无法检测到它，因此无法再次添加它。问题似乎与 CUPS 有关，因为打印机似乎可以正常检测到。以下是一些命令的输出：
尾部-f / var / log / syslog：
Feb 7 15:49:14 piubuntu kernel: [ 862.808058] usb 3-2: new full-speed USB device number 16 using uhci_hcd
Feb 7 15:49:14 piubuntu kernel: [ 862.983104] usb 3-2: New USB device found, idVendor=04e8, idProduct=3297
Feb 7 15:49:14 piubuntu kernel: [ 862.983115] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Feb 7 15:49:14 piubuntu kernel: [ 862.983122] usb 3-2: Product: ML-191x 252x Series
Feb 7 15:49:14 piubuntu kernel: [ 862.983128] usb 3-2: Manufacturer: Samsung Electronics Co., Ltd.
Feb 7 15:49:14 piubuntu kernel: [ 862.983134] usb 3-2: SerialNumber: Z2L9BKEZ600533N.
Feb 7 15:49:14 piubuntu kernel: [ 862.990262] usblp 3-2:1.0: usblp0: USB Bidirectional printer dev 16 if 0 alt 0 proto 2 vid 0x04E8 pid 0x3297
Feb 7 15:49:14 piubuntu mtp-probe: checking bus 3, device 16: "/sys/devices/pci0000:00/0000:00:1d.1/usb3/3-2"
Feb 7 15:49:14 piubuntu mtp-probe: bus: 3, device: 16 was not an MTP device
Feb 7 15:49:14 piubuntu udev-configure-printer: add /devices/pci0000:00/0000:00:1d.1/usb3/3-2
Feb 7 15:49:14 piubuntu udev-configure-printer: device devpath is /devices/pci0000:00/0000:00:1d.1/usb3/3-2
Feb 7 15:49:14 piubuntu udev-configure-printer: MFG:Samsung MDL:ML-191x 252x Series SERN:- serial:Z2L9BKEZ600533N.
Feb 7 15:49:15 piubuntu kernel: [ 864.032213] usblp0: removed
Feb 7 15:49:15 piubuntu kernel: [ 864.046284] usblp 3-2:1.0: usblp0: USB Bidirectional printer dev 16 if 0 alt 0 proto 2 vid 0x04E8 pid 0x3297
Feb 7 15:49:17 piubuntu udev-configure-printer: URI contains USB serial number
Feb 7 15:49:17 piubuntu udev-configure-printer: URI match: usb://Samsung/ML-191x%20252x%20Series?serial=Z2L9BKEZ600533N.
Feb 7 15:49:17 piubuntu kernel: [ 866.018157] audit: type=1400 audit(1454856557.291:128): apparmor="DENIED" operation="signal" profile="/usr/sbin/cupsd" pid=3606 comm="cups-deviced" requested_mask="send" denied_mask="send" signal=term peer="unconfined"
Feb 7 15:49:17 piubuntu kernel: [ 866.018179] audit: type=1400 audit(1454856557.291:129): apparmor="DENIED" operation="signal" profile="/usr/sbin/cupsd" pid=3606 comm="cups-deviced" requested_mask="send" denied_mask="send" signal=term peer="unconfined"
Feb 7 15:49:17 piubuntu kernel: [ 866.019187] audit: type=1400 audit(1454856557.291:130): apparmor="DENIED" operation="signal" profile="/usr/sbin/cupsd" pid=2084 comm="cupsd" requested_mask="send" denied_mask="send" signal=term peer="unconfined"
Feb 7 15:49:17 piubuntu kernel: [ 866.019205] audit: type=1400 audit(1454856557.291:131): apparmor="DENIED" operation="signal" profile="/usr/sbin/cupsd" pid=2084 comm="cupsd" requested_mask="send" denied_mask="send" signal=term peer="unconfined"
Feb 7 15:49:17 piubuntu udev-configure-printer: About to add queue for usb://Samsung/ML-191x%20252x%20Series?serial=Z2L9BKEZ600533N.
Feb 7 15:49:17 piubuntu udev-add-printer: add_queue: URIs=['usb://Samsung/ML-191x%20252x%20Series?serial=Z2L9BKEZ600533N.']
Feb 7 15:49:17 piubuntu udev-add-printer: D-Bus method call failed: org.freedesktop.DBus.Error.ServiceUnknown: The name com.redhat.NewPrinterNotification was not provided by any .service files
Feb 7 15:49:20 piubuntu udev-add-printer: PPD: lsb/usr/cupsfilters/textonly.ppd; Status: 3
lsusb：
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 045e:0040 Microsoft Corp. Wheel Mouse Optical
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 016: ID 04e8:3297 Samsung Electronics Co., Ltd ML-191x/ML-252x Laser Printer
Bus 003 Device 002: ID 08ff:2580 AuthenTec, Inc. AES2501 Fingerprint Sensor
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
lpinfo-v：
network http
network ipp14
serial serial:/dev/ttyS0?baud=115200
network https
network ipps
network socket
network smb
network ipp
network lpd
非常感谢 Marco
答案1
这似乎是我在https://github.com/zdohnal/system-config-printer/issues/48。
您可以从以下位置下载一些相关软件包的更新版本
https://launchpad.net/ubuntu/+source/system-config-printer/1.5.7+20160812-0ubuntu1/+build/10606657。（下载 .deb 文件，然后使用 安装它们sudo dpkg -i system-config-printer*.deb）。但是，升级并没有解决我的问题，所以我正在等待对错误报告的回复。