*** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** SUMMARY When I use my Logitech MX Anywhere 3 mouse over bluetooth, I have to turn the wheel 8 clicks for it to perform any scrolling action. Sometimes it starts working in one or both directions after the initial 8 scroll actions, but it is not persistent. `btmon` sees every scroll action, but only every 8th is performed. Mouse `Scrolling speed` setting only impacts how much every 8th notch scrolls. Here is what `btom` output looks like (one action in each direction, which were not registered in KDE): > ACL Data RX: Handle 76 flags 0x02 dlen 14 #2 [hci0] 2.300707 ATT: Handle Value Notification (0x1b) len 9 Handle: 0x002a Data: 0000000000ff00 > ACL Data RX: Handle 76 flags 0x02 dlen 14 #3 [hci0] 3.373249 ATT: Handle Value Notification (0x1b) len 9 Handle: 0x002a Data: 00000000000100 The exact same mouse works properly on other linux machine running sway, a macbook running macos and an android device. STEPS TO REPRODUCE 1. Use MX Anywhere 3 mouse over bluetooth 2. Scroll by 1 to 7 notches OBSERVED RESULT Nothing happens EXPECTED RESULT 1 to 7 scroll actions happen SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.6.3-414.asahi.fc39.aarch64+16k KDE Plasma Version: 5.27.11 KDE Frameworks Version: 5.115.0 Qt Version: 5.15.12 Graphics Platform: Wayland ADDITIONAL INFORMATION I'm using it on MacBook Pro 2021 running asahi linux. My reddit post (contains someone experiencing a similar bug on a VM): https://www.reddit.com/r/kde/comments/1c64qgk/mouse_scrolling_skips_steps/ Someone having the same problem 3 years ago: https://www.reddit.com/r/kde/comments/i9qui7/mouse_wheel_randomly_reverts_to_exceedingly_slow/g6fdia4/