SUMMARY When Konsole is run as a VNC server, [Shift] key is not a modifier key. STEPS TO REPRODUCE 1. { konsole -platform vnc; } 2. Connect using TigerVNC! 2. { read; } 3. Press [Shift [1]]! OBSERVED RESULT ^@1 EXPECTED RESULT ! SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: openSUSE Tumbleweed 20221230 (available in About System) KDE Plasma Version: 5.26.4 KDE Frameworks Version: 5.101.0 Qt Version: 5.15.7 ADDITIONAL INFORMATION I also used RDC, with the same result.