我正在使用Dell KB216 Wired Keyboard和Ubuntu系统，按Fn键本应该能让光标跳转到行首或行尾，但实际按下去光标只是正常移动，每次只动一个字符，这让我很困扰。

以下是我排查下来的几个情况：

• Fn键在其他功能上是正常的，比如切换按键的替代功能完全没问题；
• 我还有另一台装了相同Ubuntu内核的笔记本，上面的Fn键相关功能完全正常；
• Home和End键本身是正常的，能正确跳转光标到行首和行尾；
• 另外我发现Fn+Esc似乎无法切换Fn键的锁定状态，Esc键上的锁定图标完全没反应。

有没有大佬知道怎么解决这个Fn键的问题呀？

系统信息（执行命令sudo inxi -Faz输出）：

System:
  Kernel: 6.7.9-060709-generic arch: x86_64 bits: 64 compiler: N/A
    clocksource: tsc available: hpet,acpi_pm
    parameters: BOOT_IMAGE=/vmlinuz-6.7.9-060709-generic
    root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
  Desktop: GNOME v: 45.2 tk: GTK v: 3.24.38 wm: gnome-shell dm: GDM3
    v: 45.beta Distro: Ubuntu 23.10 (Mantic Minotaur)
Machine:
  Type: Desktop Mobo: Micro-Star model: MAG B550 TOMAHAWK MAX WIFI (MS-7C91)
    v: 1.0 serial: <filter> UEFI: American Megatrends LLC. v: 2.60
    date: 10/10/2023
CPU:
  Info: model: AMD Ryzen 9 5950X socket: AM4 bits: 64 type: MT MCP
    arch: Zen 3+ gen: 4 level: v3 note: check built: 2022 process: TSMC n6 (7nm)
    family: 0x19 (25) model-id: 0x21 (33) stepping: 2 microcode: 0xA20120E
  Topology: cpus: 1x cores: 16 tpc: 2 threads: 32 smt: enabled cache:
    L1: 1024 KiB desc: d-16x32 KiB; i-16x32 KiB L2: 8 MiB desc: 16x512 KiB
    L3: 64 MiB desc: 2x32 MiB
  Speed (MHz): avg: 2275 high: 3400 min/max: 2200/5083 boost: enabled
    base/boost: 3400/5050 scaling: driver: acpi-cpufreq governor: schedutil
    volts: 1.1 V ext-clock: 100 MHz cores: 1: 2200 2: 2200 3: 2200 4: 2200
    5: 3400 6: 2200 7: 2200 8: 2200 9: 2200 10: 3400 11: 2200 12: 2200
    13: 2200 14: 2200 15: 2200 16: 2200 17: 2200 18: 2200 19: 2200 20: 2200
    21: 2200 22: 2200 23: 2200 24: 2200 25: 2200 26: 2200 27: 2200 28: 2200
    29: 2200 30: 2200 31: 2200 32: 2200 bogomips: 217615
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data status: Not affected
  Type: retbleed status: Not affected
  Type: spec_rstack_overflow mitigation: Safe RET
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW,
    STIBP: always-on, RSB filling, PBRSB-eIBRS: Not affected
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: NVIDIA GA104 [GeForce RTX 3060] vendor: Micro-Star MSI
    driver: nvidia v: 545.29.06 alternate: nvidiafb,nouveau,nvidia_drm
    non-free: 535.xx+ status: current (as of 2023-08) arch: Ampere code: GAxxx
    process: TSMC n7 (7nm) built: 2020-22 pcie: gen: 1 speed: 2.5 GT/s
    lanes: 16 link-max: gen: 4 speed: 16 GT/s ports: active: none off: DP-1
    empty: DP-2,DP-3,HDMI-A-1 bus-ID: 2b:00.0 chip-ID: 10de:2487
    class-ID: 0300
  Display: server: X.Org v: 1.21.1.7 with: Xwayland v: 23.2.0
    compositor: gnome-shell driver: X: loaded: nvidia
    unloaded: fbdev,modesetting,nouveau,vesa gpu: nvidia,nvidia-nvswitch
    display-ID: :1 screens: 1
  Screen-1: 0 s-res: 3424x1926 s-dpi: 144 s-size: 606x341mm (23.86x13.43")
    s-diag: 695mm (27.38")
  Monitor-1: DP-1 mapped: DP-0 note: disabled model: MSI G274QPF
    serial: <filter> built: 2023 res: 3424x1926 hz: 165 dpi: 145 gamma: 1.2
    size: 600x330mm (23.62x12.99") diag: 685mm (27") ratio: 16:9 modes:
    max: 2560x1440 min: 640x480
  API: OpenGL v: 4.6.0 NVIDIA 545.29.06 renderer: NVIDIA GeForce RTX
    3060/PCIe/SSE2 direct-render: Yes
Audio:
  Device-1: NVIDIA GA104 High Definition Audio vendor: Micro-Star MSI
    driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
    bus-ID: 2b:00.1 chip-ID: 10de:228b class-ID: 0403
  Device-2: AMD Starship/Matisse HD Audio vendor: Micro-Star MSI
    driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
    bus-ID: 2d:00.4 chip-ID: 1022:1487 class-ID: 0403
  API: ALSA v: k6.7.9-060709-generic status: kernel-api
    tools: alsactl,alsamixer,amixer
  Server-1: PipeWire v: 0.3.79 status: n/a (root, process) with:
    1: pipewire-pulse status: active 2: wireplumber status: active
    3: pipewire-alsa type: plugin tools: pw-cat,pw-cli,wpctl
Network:
  Device-1: MEDIATEK MT7921K Wi-Fi 6E 80MHz driver: mt7921e v: kernel pcie:
    gen: 2 speed: 5 GT/s lanes: 1 bus-ID: 29:00.0 chip-ID: 14c3:0608
    class-ID: 0280
  IF: wlo1 state: up mac: <filter>
  Device-2: Realtek RTL8125 2.5GbE vendor: Micro-Star MSI driver: r8169
    v: kernel pcie: gen: 2 speed: 5 GT/s lanes: 1 port: f000 bus-ID: 2a:00.0
    chip-ID: 10ec:8125 class-ID: 0200
  IF: enp42s0 state: down mac: <filter>
Bluetooth:
  Device-1: MediaTek Wireless_Device driver: btusb v: 0.8 type: USB rev: 2.1
    speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-9:6 chip-ID: 0e8d:0608
    class-ID: e001 serial: <filter>
  Report: hciconfig ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 5.2
    lmp-v: 11 sub-v: 2311 hci-v: 11 rev: 919 class-ID: 6c0104
  Info: acl-mtu: 1021:6 sco-mtu: 240:8 link-policy: rswitch sniff
    link-mode: peripheral accept service-classes: rendering, capturing, audio,
    telephony
Drives:
  Local Storage: total: 1.82 TiB used: 65.94 GiB (3.5%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: MSI model: M480 PRO 2TB
    size: 1.82 TiB block-size: physical: 512 B logical: 512 B speed: 63.2 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: EIFM80.0 temp: 37.9 C
    scheme: GPT
Partition:
  ID-1: / raw-size: 1.82 TiB size: 1.79 TiB (98.37%) used: 65.66 GiB (3.6%)
    fs: ext4 block-size: 4096 B dev: /dev/dm-1 maj-min: 252:1
    mapped: ubuntu--vg-ubuntu--lv
  ID-2: /boot raw-size: 2 GiB size: 1.9 GiB (95.01%) used: 283.9 MiB (14.6%)
    fs: ext4 block-size: 4096 B dev: /dev/nvme0n1p2 maj-min: 259:2
  ID-3: /boot/efi raw-size: 1.05 GiB size: 1.05 GiB (99.80%)
    used: 6.1 MiB (0.6%) fs: vfat block-size: 512 B dev: /dev/nvme0n1p1
    maj-min: 259:1
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: no
  ID-1: swap-1 type: file size: 8 GiB used: 0 KiB (0.0%) priority: -2
    file: /swap.img
Sensors:
  System Temperatures: cpu: 34.5 C mobo: N/A gpu: nvidia temp: 51 C
  Fan Speeds (rpm): N/A gpu: nvidia fan: 32%
Info:
  Processes: 539 Uptime: 22m wakeups: 0 Memory: total: 32 GiB
  available: 31.27 GiB used: 4.22 GiB (13.5%) Init: systemd v: 253
  target: graphical (5) default: graphical tool: systemctl Compilers:
  gcc: 13.2.0 alt: 12/13 clang: 16.0.6 Packages: 1842 pm: dpkg pkgs: 1825
  libs: 958 tools: apt,apt-get pm: flatpak pkgs: 7 pm: snap pkgs: 10
  Shell: Sudo (sudo) v: 1.9.14p2 default: Bash v: 5.2.15
  running-in: gnome-terminal inxi: 3.3.29

备注：内容来源于stack exchange，提问作者Normand Espinoza