Package: kalgebra Version: 4:20.12.1-1 Followup-For: Bug #1016658 X-Debbugs-Cc: karogyoker2+debbug@gmail.com I've tried the same in a VM on a Haswell CPU. I removed chromium related packages and installed epiphany-web. These steps don't interfere with kalgebra. Even before and after these steps kalgebra was working correctly. It might have to do something with SSE2 or SSE3 maybe?