*** 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 Please remove this comment after reading and before submitting - thanks! *** SUMMARY Setup: Dual monitor (may be relevant), right monitor is oriented vertically. If Okular is open (usually placed, full-screen, on the right monitor), user logs out, then user puts computer to sleep - after re-waking the computer and logging back in, scrolling via mouse within the Okular viewport is frozen. Note that scrolling with PgUp/PgDn and with arrow keys DOES work, as well as all other functions (ie: menu, shortcuts, header buttons, etc.) STEPS TO REPRODUCE 1. Open PDF with Okular 2. log out 3. put computer to sleep from login screen 4. log back in 5. attempt scrolling with mouse inside Okular viewport OBSERVED RESULT The document presented within the viewport will not scroll. EXPECTED RESULT Scrolling with the mouse should work within the Okular viewport. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 24.04 KDE Plasma Version: 5.27.11 KDE Frameworks Version: 5.115.0 Qt Version: 5.15.13 Okular: 23.08.5 ADDITIONAL INFORMATION Dual monitor setup - right monitor in vertical orientation (usually houses the Okular application)