Are you talking about serial console? Or graphical (VGA) console? Which QEMU target (x86? ... and which machine?)? How did you start QEMU? ... this bug report clearly lacks some more information...
** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1615079 Title: GTK+ UI virtual consoles scrolling broken Status in QEMU: Incomplete Bug description: "In the virtual consoles, you can use Ctrl-Up, Ctrl-Down, Ctrl-PageUp and Ctrl-PageDown to move in the back log." To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1615079/+subscriptions