回复可以传图

System: Host: BORE Kernel: 5.15.45-amd64-desktop x86_64 bits: 64 Desktop: Deepin 20.7
Distro: Deepin 20.7
Machine: Type: Laptop System: LENOVO product: 81FW v: Lenovo Legion Y7000 serial:
Mobo: LENOVO model: LNVNB161216 v: SDK0L77769 WIN serial: UEFI: LENOVO
v: 8JCN23WW date: 05/25/2018
Battery: ID-1: BAT0 charge: 56.9 Wh condition: 56.9/57.4 Wh (99%)
CPU: Topology: Quad Core model: Intel Core i5-8300H bits: 64 type: MT MCP L2 cache: 8192 KiB
Speed: 3991 MHz min/max: 800/4000 MHz Core speeds (MHz): 1: 3964 2: 3963 3: 3982 4: 3976
5: 3965 6: 3999 7: 3991 8: 3953
Graphics: Device-1: Intel UHD Graphics 630 driver: i915 v: kernel
Device-2: NVIDIA GP107M [GeForce GTX 1050 Mobile] driver: nvidia v: 510.73.08
Display: x11 server: X.Org 1.20.11 driver: modesetting,nvidia resolution: 1920x1080~60Hz
OpenGL: renderer: NVIDIA GeForce GTX 1050/PCIe/SSE2 v: 4.6.0 NVIDIA 510.73.08
Audio: Device-1: Intel Cannon Lake PCH cAVS driver: snd_hda_intel
Device-2: NVIDIA GP107GL High Definition Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.15.45-amd64-desktop
Network: Device-1: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter driver: ath10k_pci
IF: wlp7s0 state: up mac: 50:5b:c2:da:b9:0b
Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169
IF: enp8s0 state: down mac: 8c:16:45:8e:46:31
Device-3: Qualcomm Atheros type: USB driver: btusb
IF-ID-1: uengine0 state: up speed: 10000 Mbps duplex: unknown mac: 6a:b3:c7:af:c9:bb
IF-ID-2: veth1YVJCB state: up speed: 10000 Mbps duplex: full mac: fe:0e:42:74:9b:c3
Drives: Local Storage: total: 1.94 TiB used: 418.89 GiB (21.1%)
ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLW128HEGR-000L2 size: 119.24 GiB
ID-2: /dev/sda vendor: Seagate model: ST2000LM007-1R8174 size: 1.82 TiB
Partition: ID-1: / size: 93.90 GiB used: 10.12 GiB (10.8%) fs: ext4 dev: /dev/nvme0n1p5
ID-2: /boot size: 1.44 GiB used: 223.7 MiB (15.2%) fs: ext4 dev: /dev/nvme0n1p2
ID-3: /home size: 707.68 GiB used: 15.94 GiB (2.3%) fs: ext4 dev: /dev/sda10
ID-4: /opt size: 95.56 GiB used: 8.69 GiB (9.1%) fs: ext4 dev: /dev/sda8
ID-5: /tmp size: 4.72 GiB used: 15.4 MiB (0.3%) fs: ext4 dev: /dev/sda9
ID-6: /var size: 9.51 GiB used: 1.69 GiB (17.8%) fs: ext4 dev: /dev/nvme0n1p4
ID-7: swap-1 size: 11.72 GiB used: 7.8 MiB (0.1%) fs: swap dev: /dev/nvme0n1p3
Sensors: System Temperatures: cpu: 59.0 C mobo: N/A
Fan Speeds (RPM): N/A
Info: Processes: 387 Uptime: 4h 17m Memory: 11.57 GiB used: 5.79 GiB (50.1%) Shell: bash inxi: 3.0.32

属性按钮和选项按钮点一下, 看看有没有可用删除的按钮, 或者直接右键一个名称, 看看有没有菜单

从打印管理器中设置默认打印机，再禁用那个不存在的打印机

属性里面没删除的，我的打印机管理器列表里就一个打印机

设置了默认其他几个项就消失了，只有一个打印机了。问题是解决了，不过这情况好奇怪啊，不知道哪来的那个不存在的打印机。不过只有一个打印机不应该本来就是默认么？还要手动点一下

我用佳能LBP2900+打印机，系统会自动识别一个型号正确但无法使用的打印机，必须手动安装一遍，然后打印管理器中就显示两个打印机