https://bugs.kde.org/show_bug.cgi?id=412616
Bug ID: 412616 Summary: GUI hangs with big pdf Product: okular Version: 1.7.3 Platform: Other OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: PDF backend Assignee: okular-de...@kde.org Reporter: richard.l...@gmail.com Target Milestone: --- SUMMARY When I open this pdf: https://www.schraeder.com/images/PDF/Fibel_Waermerueckgewinnung.pdf, scroll in the middle of the document and then change to another tab the GUI is hanging and I cannot scroll in the other document for a couple of seconds. When I switch to it GUI is hanging again for some time. I can repeat this for at least 50 seconds until the pdf fully is loaded/rendered and there are no hangs anymore. During all the time my 4-core CPU uses just about 113% (from 400%) and other programs work just fine. I have set memory performance to greedy, but this also happens under normal settings. CPU info: Quad Core model: AMD A10-7850K Radeon R7 12 Compute Cores 4C+8G bits: 64 type: MCP L2 cache: 2048 KiB Speed min/max: 1700/3700 MHz STEPS TO REPRODUCE 1. Open any pdf document 2. open https://www.schraeder.com/images/PDF/Fibel_Waermerueckgewinnung.pdf 3. fast scroll to middle of document 4. switch tab to pdf from 1. OBSERVED RESULT GUI hangs EXPECTED RESULT GUI shoud'nt hang SOFTWARE/OS VERSIONS Operating System: KDE Plasma Version: 5.16.3 KDE Frameworks Version: 5.60.0 Qt Version: 5.12.4 Kernel Version: 4.19.26-1-CHAKRA OS Type: 64-bit Processors: 4 × AMD A10-7850K Radeon R7, 12 Compute Cores 4C+8G Memory: 14,7 GiB of RAM -- You are receiving this mail because: You are watching all bug changes.