after modprobe fbcon framebuffer console is actived. This is not permanent, after reboot you need modprobe it again. If you want to see kernel output when booting, you need to modify preinit script (or add modprobe command to /boot.sh) I do not know now. It is not simple to integrate wireless-testing patches to power-kernel... And who told you this value?? bq27x00_battery module export temperature value to file /sys/class/power_supply/bq27200-0/temp in tenths of degree Celsius (kernel modules must export value in this unit - it is defined in kernel doc!). So if you read 346 from this file, temperature of your battery is 34.6 °C