Dolphin: no CTRL+MWheelDown icon zoom out

Hello,

I have had for some time (I think it coincides with 5.27 but I’m not sure) a pb on my main machine whereby I can increase the size of icons in Dolphin with CTRL+MWheelUp, but cannot zoom out with the reverse operation CTRL+MWheelDown.

Needless to say, the problem is not mechanical; such actions work fine everywhere else.

Furthermore, I have two other machines (both laptops) with EOS, similarly up-to-date, which do not exhibit that behaviour.

So I assume that I have some conflict with some setting somewhere, somehow, but I have no idea where to look. Obviously Dolphin’s shortcut configurator lists only pure keyboard shortcuts, which this is not.

Any idea?

inxi -Faz
System:
  Kernel: 6.2.1-arch1-1 arch: x86_64 bits: 64 compiler: gcc v: 12.2.1
    parameters: BOOT_IMAGE=/boot/vmlinuz-linux
    root=UUID=407d88d0-6177-47f1-bc92-f91f21997156 rw loglevel=6 nowatchdog
    nvme_load=YES nvidia-drm.modeset=1
  Desktop: KDE Plasma v: 5.27.2 tk: Qt v: 5.15.8 wm: kwin_x11 vt: 1 dm: SDDM
    Distro: EndeavourOS base: Arch Linux
Machine:
  Type: Desktop System: MATERIEL.NET product: CUSTOM v: V1
    serial: <superuser required>
  Mobo: ASUSTeK model: TUF GAMING B550-PLUS v: Rev X.0x
    serial: <superuser required> UEFI: American Megatrends v: 2604
    date: 02/25/2022
Battery:
  ID-1: hidpp_battery_0 charge: 86% condition: N/A volts: 4.0 min: N/A
    model: Logitech G502 LIGHTSPEED Wireless Gaming Mouse type: N/A
    serial: <filter> status: discharging
CPU:
  Info: model: AMD Ryzen 9 5900X 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: 0xA201205
  Topology: cpus: 1x cores: 12 tpc: 2 threads: 24 smt: enabled cache:
    L1: 768 KiB desc: d-12x32 KiB; i-12x32 KiB L2: 6 MiB desc: 12x512 KiB
    L3: 64 MiB desc: 2x32 MiB
  Speed (MHz): avg: 2472 high: 3700 min/max: 2200/4950 boost: enabled
    scaling: driver: acpi-cpufreq governor: schedutil cores: 1: 3598 2: 2200
    3: 2200 4: 2200 5: 2200 6: 2200 7: 3598 8: 2200 9: 2880 10: 2200 11: 2200
    12: 3600 13: 2200 14: 2363 15: 2200 16: 2200 17: 2200 18: 2200 19: 3700
    20: 2200 21: 2200 22: 2200 23: 2200 24: 2200 bogomips: 177688
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
  Vulnerabilities:
  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_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 3070 Lite Hash Rate] vendor: ASUSTeK
    driver: nvidia v: 525.89.02 alternate: nouveau,nvidia_drm non-free: 525.xx+
    status: current (as of 2023-02) arch: Ampere code: GAxxx
    process: TSMC n7 (7nm) built: 2020-22 pcie: gen: 2 speed: 5 GT/s lanes: 16
    link-max: gen: 4 speed: 16 GT/s ports: active: none off: DP-2 empty: DP-1,
    DP-3, HDMI-A-1, HDMI-A-2 bus-ID: 07:00.0 chip-ID: 10de:2488 class-ID: 0300
  Display: x11 server: X.Org v: 21.1.7 with: Xwayland v: 22.1.8
    compositor: kwin_x11 driver: X: loaded: nvidia gpu: nvidia,nvidia-nvswitch
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 2560x1440 s-dpi: 108 s-size: 602x342mm (23.70x13.46")
    s-diag: 692mm (27.26")
  Monitor-1: DP-2 note: disabled model: ROG PG279QM serial: <filter>
    built: 2022 res: 2560x1440 dpi: 108 gamma: 1.2
    size: 600x340mm (23.62x13.39") diag: 684mm (26.9") ratio: 16:9 modes:
    max: 2560x1440 min: 640x480
  API: OpenGL v: 4.6.0 NVIDIA 525.89.02 renderer: NVIDIA GeForce RTX
    3070/PCIe/SSE2 direct-render: Yes
Audio:
  Device-1: NVIDIA GA104 High Definition Audio vendor: ASUSTeK
    driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
    bus-ID: 07:00.1 chip-ID: 10de:228b class-ID: 0403
  Device-2: AMD Starship/Matisse HD Audio vendor: ASUSTeK
    driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
    bus-ID: 09:00.4 chip-ID: 1022:1487 class-ID: 0403
  Sound API: ALSA v: k6.2.1-arch1-1 running: yes
  Sound Interface: sndio v: N/A running: no
  Sound Server-1: PulseAudio v: 16.1 running: no
  Sound Server-2: PipeWire v: 0.3.66 running: yes
Network:
  Device-1: Realtek RTL8125 2.5GbE vendor: ASUSTeK driver: r8169 v: kernel
    pcie: gen: 2 speed: 5 GT/s lanes: 1 port: f000 bus-ID: 06:00.0
    chip-ID: 10ec:8125 class-ID: 0200
  IF: enp6s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:
  Local Storage: total: 5.46 TiB used: 2.79 TiB (51.0%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung model: SSD 980 PRO with
    Heatsink 2TB size: 1.82 TiB block-size: physical: 512 B logical: 512 B
    speed: 63.2 Gb/s lanes: 4 type: SSD serial: <filter> rev: 4B2QGXA7
    temp: 30.9 C scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 type: USB vendor: Samsung
    model: SSD 870 EVO 4TB size: 3.64 TiB block-size: physical: 512 B
    logical: 512 B type: SSD serial: <filter> scheme: GPT
Partition:
  ID-1: / raw-size: 878.91 GiB size: 864.04 GiB (98.31%)
    used: 687.94 GiB (79.6%) fs: ext4 dev: /dev/nvme0n1p5 maj-min: 259:5
  ID-2: /boot/efi raw-size: 100 MiB size: 96 MiB (96.00%)
    used: 25.5 MiB (26.5%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
Swap:
  Alert: No swap data was found.
Sensors:
  System Temperatures: cpu: 41.6 C mobo: N/A gpu: nvidia temp: 31 C
  Fan Speeds (RPM): N/A gpu: nvidia fan: 0%
Info:
  Processes: 387 Uptime: 7m wakeups: 2 Memory: 31.26 GiB used: 3.2 GiB (10.2%)
  Init: systemd v: 253 default: graphical tool: systemctl Compilers:
  gcc: 12.2.1 clang: 15.0.7 Packages: pm: pacman pkgs: 1568 libs: 378
  tools: yay Shell: Zsh v: 5.9 running-in: konsole inxi: 3.3.25

Nobody has any idea?

I have a vague feeling I’ve encountered this problem before, too.