https://bugs.freedesktop.org/show_bug.cgi?id=108464
--- Comment #18 from Duncan Roe duncan_roe@optusnet.com.au --- Mixed results on applying this patch. IN BRIEF: If you could eliminate this second Oops then we can see what works and what doesn't. In the meantime with the patch applied to v4.20 in the stable repository: reboot *sometimes* works. Ctl-Alt-Del w/out logging in seems not to. Log in as root and issue reboot cmd: no. Well it did work for me a couple of times but I can't seem to be able to do it again. Another thing: I boot to command level. If I let the VC time out (backlight goes off) then I can never wake it again no matter what keys I press. Caps Lock light goes on and off, so keyboard is still active. Hopefully this all gets better once there is no Oops. Attachment 143055 pinpoints the immediate NULL pointer. Again this is a new aux_engine.