Re LED blinking: I have been asking on IRC (porters and regular SFOS channel) and have not got a reply regarding it. Thank you for providing it - will close our port issue as it is on SFOS then.
Re glitch: try whether this will work for you:
cd /sys/class/devfreq/soc:qcom,gpubw
echo 1720 > min_freq
Have to run it as root