Same. I have actually experienced this and 'settings/display crash' any time I have flashed this kernel on a cm-based build. Just my notes. No implication intended.
If you haven't made any kernel tweaks you could flash kernel, wipe cache, reboot.
you will add the ability to OC the gpu for the stock lollipop? i have found that the reason for laging sometimes in stock , is because of gpu.Even when i put the gpu governor to perfomance, is still laging,but after the oc in the aosp version lag has gone forever
thanks in advance