首先，请耐心等待，因为我是 Ubuntu 新手。我的电脑上安装了 Ubuntu 19.10，打印机工作正常。升级到 20.04 后仍然没有问题，直到我不得不重新安装 20.04。在第一次安装时，主目录都是一个，现在我已切换到单独分区上的主目录（我不认为这是问题的一部分，但我试图尽可能多地向您提供信息）。我进入 Ubuntu wiki“调试打印问题”，并运行了那里的终端命令。以下是我的终端会话的输出。
james@asus-main:~$ lpstat -p -d
printer Canon_MG5300_series is idle. enabled since Wed 06 May 2020 08:40:43 PM
no system default destination
james@asus-main:~$ lpoptions -d printer
lpoptions: Unknown printer or class.
james@asus-main:~$ lsmod | grep usb
usblp 24576 0
usb_storage 77824 2 uas,ums_realtek
usbhid 57344 0
hid 131072 2 usbhid,hid_generic
james@asus-main:~$ tail -f /var/log/syslog
May 6 20:54:12 asus-main systemd[1]: Starting PackageKit Daemon...
May 6 20:54:12 asus-main PackageKit: daemon start
May 6 20:54:12 asus-main dbus-daemon[782]: [system] Successfully activated service 'org.freedesktop.PackageKit'
May 6 20:54:12 asus-main systemd[1]: Started PackageKit Daemon.
May 6 20:54:12 asus-main PackageKit: resolve transaction /29_cbcedcda from uid 1000 finished with success after 356ms
May 6 20:54:39 asus-main PackageKit: resolve transaction /30_caccbeda from uid 1000 finished with success after 352ms
May 6 20:55:53 asus-main PackageKit: resolve transaction /31_edddebed from uid 1000 finished with success after 354ms
May 6 20:55:53 asus-main PackageKit: get-details transaction /32_cbdbcbcd from uid 1000 finished with success after 358ms
May 6 20:57:35 asus-main snapd[798]: api.go:985: Installing snap "libreoffice" revision unset
May 6 20:57:45 asus-main systemd[1727]: gnome-launched-gnome-control-center.desktop-6086.scope: Succeeded.
May 6 21:00:10 asus-main systemd[1]: Started Configure Plugged-In Printer.
May 6 21:00:10 asus-main udev-configure-printer: add usb-001-008
May 6 21:00:10 asus-main udev-configure-printer: device devpath is /devices/pci0000:00/0000:00:12.2/usb1/1-1
May 6 21:00:10 asus-main udev-configure-printer: Device already handled
May 6 21:00:10 asus-main systemd[1]: [email protected]: Main process exited, code=exited, status=1/FAILURE
May 6 21:00:10 asus-main systemd[1]: [email protected]: Failed with result 'exit-code'.
May 6 21:00:25 asus-main systemd-resolved[770]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.
May 6 21:00:26 asus-main systemd-resolved[770]: message repeated 2 times: [ Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.]
May 6 21:00:26 asus-main colord[870]: failed to get session [pid 3480]: No data available
May 6 21:00:57 asus-main PackageKit: daemon quit
May 6 21:00:57 asus-main systemd[1]: packagekit.service: Succeeded.
^C
james@asus-main:~$ tail -f /var/log/syslog
May 6 21:01:43 asus-main /usr/lib/gdm3/gdm-x-session[1813]: (II) RADEON(0): Modeline "800x600"x0.0 49.50 800 816 896 1056 600 601 604 625 +hsync +vsync (46.9 kHz e)
May 6 21:01:43 asus-main /usr/lib/gdm3/gdm-x-session[1813]: (II) RADEON(0): Modeline "800x600"x0.0 50.00 800 856 976 1040 600 637 643 666 +hsync +vsync (48.1 kHz e)
May 6 21:01:43 asus-main /usr/lib/gdm3/gdm-x-session[1813]: (II) RADEON(0): Modeline "1152x864"x0.0 108.00 1152 1216 1344 1600 864 865 868 900 +hsync +vsync (67.5 kHz e)
May 6 21:01:43 asus-main /usr/lib/gdm3/gdm-x-session[1813]: (II) RADEON(0): Modeline "1280x720"x60.0 74.48 1280 1336 1472 1664 720 721 724 746 -hsync +vsync (44.8 kHz e)
May 6 21:01:43 asus-main /usr/lib/gdm3/gdm-x-session[1813]: (II) RADEON(0): Modeline "1280x800"x0.0 71.00 1280 1328 1360 1440 800 803 809 823 +hsync -vsync (49.3 kHz e)
May 6 21:01:45 asus-main ModemManager[885]: <info> Couldn't check support for device '/sys/devices/pci0000:00/0000:00:15.1/0000:03:00.0': not supported by any plugin
May 6 21:01:47 asus-main dbus-daemon[1740]: apparmor="DENIED" operation="dbus_method_call" bus="session" path="/org/gtk/Notifications" interface="org.gtk.Notifications" member="AddNotification" mask="send" name="org.gtk.Notifications" pid=2246 label="snap.snap-store.ubuntu-software" peer_pid=2068 peer_label="unconfined"
May 6 21:01:47 asus-main systemd[1727]: tracker-extract.service: Succeeded.
May 6 21:02:07 asus-main tracker-store[6792]: OK
May 6 21:02:07 asus-main systemd[1727]: tracker-store.service: Succeeded.
^C
james@asus-main:~$ lsusb
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 0bda:0158 Realtek Semiconductor Corp. USB 2.0 multicard reader
Bus 001 Device 008: ID 04a9:1754 Canon, Inc. PIXMA MG5300 Series
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 0461:4de2 Primax Electronics, Ltd USB Optical Mouse
Bus 003 Device 002: ID 0461:4e26 Primax Electronics, Ltd Wired USB Keyboard
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
james@asus-main:~$ ls -l /dev/usb/lp* /dev/bus/usb/*/*
crw-rw-r-- 1 root root 189, 0 May 6 21:01 /dev/bus/usb/001/001
crw-rw-r-- 1 root root 189, 3 May 6 21:01 /dev/bus/usb/001/004
crw-rw-r--+ 1 root lp 189, 7 May 6 21:01 /dev/bus/usb/001/008
crw-rw-r-- 1 root root 189, 128 May 6 21:01 /dev/bus/usb/002/001
crw-rw-r-- 1 root root 189, 256 May 6 21:01 /dev/bus/usb/003/001
crw-rw-r-- 1 root root 189, 257 May 6 21:01 /dev/bus/usb/003/002
crw-rw-r-- 1 root root 189, 258 May 6 21:01 /dev/bus/usb/003/003
crw-rw-r-- 1 root root 189, 384 May 6 21:01 /dev/bus/usb/004/001
crw-rw-r-- 1 root root 189, 512 May 6 21:01 /dev/bus/usb/005/001
crw-rw-r-- 1 root root 189, 640 May 6 21:01 /dev/bus/usb/006/001
crw-rw---- 1 root lp 180, 0 May 6 21:01 /dev/usb/lp0
james@asus-main:~$ sudo usb_printerid /dev/usb/lp0
[sudo] password for james:
GET_DEVICE_ID string:
MFG:Canon;CMD:BJL,BJRaster3,BSCCe,NCCe,IVEC,IVECPLI;SOJ:BJNP2,BJNPe;MDL:MG5300 series;CLS:PRINTER;DES:Canon MG5300 series;VER:2.030;STA:10;FSI:03;HRI:2;MSI:BOFF,DAT,E3,HFSF,JOFF,K21000700;PDR:B;PSE:ACFC35272;
james@asus-main:~$ sudo usb_printerid /dev/usb/lp1
Error: No such file or directory: can't open '/dev/usb/lp1'
james@asus-main:~$ lpinfo -v
network beh
file cups-brf:/
network socket
network lpd
network ipp
network http
network https
direct hp
network ipps
direct usb://Canon/MG5300%20series?serial=2B2112&interface=1
direct hpfax
network dnssd://Canon%20MG5300%20series._printer._tcp.local/
james@asus-main:~$
在我输入这些内容时，我的打印机在过去 60 分钟内一直在尝试打印文档。打印机不会打印测试页。系统显然正在查看打印机。打印机可能有问题；在我重新布置工作站之前，打印机可以使用底部托盘。但是在移动打印机并将其翻转到侧面以连接电缆后，当我尝试从底部托盘打印时，它开始发出奇怪的咔嗒声。不得不使用背面板来放纸，它确实可以工作，直到我重新安装 20.04 并将主分区设置在不同的分区上。?????
答案1
我在 Pixma MP230 上解决了类似的问题，如下所示：
- 删除
ippusbxd：（sudo apt remove ippusbxd在终端中运行） - 使用 GUI 打印机实用程序删除并重新安装打印机
- 打印测试页
经过几个小时的故障排除后，这个方法对我很有用，我希望它对你也有用！
您可能还想阅读这些相关问题，其中比我更有知识的人解释了现在所有打印机都是“网络打印机”或类似的东西。显然，删除ippusbxd并不是最优雅的解决方案，但只要它有效，我就很高兴 :-)