SUMMARY If a menu is currently open, Alt+Tab will navigate through the menu options instead of switching between windows. STEPS TO REPRODUCE 0. Open a few windows of any sort 1. Run System Settings 2. Click on the hamburger menu button once, to bring up the menu 3. Hold Alt 4. Press and release Tab while still holding Alt OBSERVED RESULT First item in the hamburger menu is highlighted. Subsequent presses of Tab (with Alt still held down) highlight subsequent menu items. EXPECTED RESULT The Alt+Tab switcher to appear, with the next window highlighted. Subsequent presses of Tab (with Alt still held down) to highlight subsequent windows. (I.e. "normal" Alt+Tab behaviour). SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20231029 KDE Plasma Version: 5.27.9 KDE Frameworks Version: 5.111.0 Qt Version: 5.15.11 Kernel Version: 6.5.9-1-default (64-bit) Graphics Platform: X11 Processors: 4 × Intel® Core™ i5-7200U CPU @ 2.50GHz Memory: 15.5 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 620 Manufacturer: HP Product Name: HP ProBook 450 G4
This is an inherent problem with X11 - context menus grab all keys, so things like alt+tab and screen lockers don't work when you have one open, and that can't be fixed. On Wayland this behaves as you'd expect