I have 15.07 up and running on my 410c board.
The memory leak seems to be gone.
The WiFi now works correctly. One thing I have found, it appears that when you write your MAC address to the file /lib/firmware/wlan/macaddr0 the letters in the address need to be lower case, not upper case (i.e. “8d:fd:f0:01:22:d7” not “8D:FD:F0:01:22:D7”).
I tried installing the development tools “sudo apt-get install linux-headers-4.0.0-linaro-lt-qcom build-essential” but it fails, you need to add the switch “–fix-missing”. Once installed you can compile and run hello_world.c on the board, no need to install a cross compiler on your laptop.
Full Disclosure: I am an employee of Qualcomm Canada. any opinions expressed in this or any other post may not reflect the opinions of my employer.