hi again,
i've faced with such problem. I have a imx6solo board with linux.There is gstreamer daemon, running from /etc/rc3 during os booting. I've edited gstreamer daemon params and entered invalid parameter, saved daemon conffile and rebooted board. After booting i get about 5 seconds (i can see gstreamer error caused by invalid parameter) for doing anything, after that os is freezes. Only hard reset can help, but after booting it repeats again. Finally board stoped booting at all. It don't give me any messages to putty. What should i do? How can i reanimate my board?