Looks related to bug 198748 as in a terminal if I do ALT+PrtSc+H I get the magic SysRq key help, so it looks like the kernel is trapping ALT+PrtSc.
Looks related to bug 198748 as in a terminal if I do ALT+PrtSc+H I get the magic SysRq key help, so it looks like the kernel is trapping ALT+PrtSc.