I don't know what you're looking at, but I've just downloaded the stable img.gz for a pi2/3 and written it to a card. It shows up in windows as a Removable Disk (ie no label) and 100% contains a config.txt:
Code Display More################################################################################ # This file is part of LibreELEC - https://libreelec.tv # Copyright (C) 2016 LibreELEC Team # # Inspired and partly copied from: # http://tinyurl.com/gvx7v95 (C) 2009-2014 Stephan Raue # http://youresuchageek.blogspot.fr/2012/09/howto-raspberry-pi-openelec-on.html # # LibreELEC is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 2 of the License, or # (at your option) any later version. # # LibreELEC is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LibreELEC. If not, see <http://www.gnu.org/licenses/>. ################################################################################ # Bootloader configuration - config.txt ################################################################################ ################################################################################ # Memory (System/GPU configuration ) ################################################################################ # default GPU memory split (do not change if you do not know what you are doing) gpu_mem=128 # SDRAM size based GPU memory split, uncomment and setup to override 'gpu_mem' gpu_mem_256=112 gpu_mem_512=160 gpu_mem_1024=256 ################################################################################ # Overclocking settings # WARNING: Do not change/enable if you do not know what you are doing! # The System may become unstable or you can have data corruption or # you can loose your warranty if you set wrong settings # # please read: http://elinux.org/RPi_config.txt#Overclocking_configuration ################################################################################ # Overclock mode settings. # # default recommended values are: arm_freq | core_freq | sdram_freq | over_voltage # no overclocking : 700 | 250 | 400 | 0 # mode 'Modest' : 800 | 300 | 400 | 0 # mode 'Medium' : 900 | 333 | 450 | 2 # mode 'High' : 950 | 450 | 450 | 6 # mode 'Turbo' : 1000 | 500 | 600 | 6 # mode 'Pi2' : 1000 | 500 | 500 | 2 # arm_freq=700 # core_freq=250 # sdram_freq=400 # over_voltage=0 # set to 'force_turbo=1' to disable dynamic overclocking (you can lose your warranty!) force_turbo=0 # If you have any data corruption using Turbo Mode and overclocking # try with this setting uncommented # If this still fails, try to use Medium mode without "over_voltage=2" # If it ultimately keeps failing, forget about this until it gets fixed # Use a more conservative mode that will works fine in any cases: # initial_turbo=30 ################################################################################ # Overscan settings ################################################################################ # Make display smaller to stop text spilling off the screen # see also http://www.raspberrypi.org/phpBB3/viewtopic.php?f=67&t=15700 # overscan_scale=1 # disable_overscan=1 # Adapt overscan values to your needs # overscan_left=57 # overscan_right=59 # overscan_top=20 # overscan_bottom=20 ################################################################################ # various settings see also: http://elinux.org/RPi_config.txt ################################################################################ # Force HDMI even if unplugged or powered off # hdmi_force_hotplug=1 # Doesn't sent initial active source message. # Avoids bringing CEC (enabled TV) out of standby and channel switch when # rebooting. hdmi_ignore_cec_init=1 ################################################################################ # License keys to enable GPU hardware decoding for various codecs # to obtain keys visit the shop at http://www.raspberrypi.com ################################################################################ # decode_MPG2=0x00000000 # decode_WVC1=0x00000000 # decode_DTS=0x00000000 # decode_DDP=0x00000000 ################################################################################ # End of default configuration # all values below this line were inserted from config.txt.bk (your old config) # and can be merged with the above values ################################################################################
The config.txt sits in the root of the sd card's FAT partition (ie the one you see in windows).
You don't need to do anything other than put it there, it will be read on boot.
I installed libreelec using the noobs download, it seems noobs does not copy the config.txt file over.
i have downloaded LibreELEC-RPi2.arm-7.0.2.img.gz file then used win32diskmanager to copy this verion
to the sd card. This worked fine the config file was copied across this time.