[G2 Q&A, Help & Troubleshooting] MarkusMcNugen:
Heres a collection of issues people have had and the ways I've seen to fix them so far. This is just what I've gathered from the CM12 and Liquid Smooth threads to try and organize it all into one post. I will try to keep this updated everyday as users find fixes (Credit will be given where credit is due). Fixes for older builds will eventually be moved to the bottom of the post as they become obsolete.

These are not guaranteed fixes, but may be able to help! This is not a support thread! I am not a developer!​

If this post helps you, hit thanks! If this post linked to another post that helped, please hit thanks on that post also!

If you have a fix feel free to reply and let me know so I can add it to the OP!​

I flashed the rom and I dont have root!

> Download and flash the SuperSU 2.37 zip from the URL below. If you need to get to recovery, enable advanced reboot options. Its under security settings in Liquid Smooth, and under developer options in CM12.

http://download.chainfire.eu/supersu

Lost Internal SDcard Access?

> Enable USB Debugging and use ADB to issue these commands:

adb shell
su
restorecon –FR /data/media/0

> Or run these commands from terminal emulator:

su
restorecon –FR /data/media/0

> Or install and run LG CM12 Storage Fixer from here: (Thanks to -viperboy-)

http://xdaforums.com/showpost.php?p=56956094&postcount=1774

> (Alternatively, you can download a flashable zip that installs LG CM12 Storage Fixer here)

https://www.mediafire.com/?3nqc51za6y1phof

All my SDcard contents are in folder 0…?

> Run this command from terminal emulator:

mv /sdcard/0/* /sdcard/

(

Add another /0/ for every nested 0 folder.

For example, with two 0 folders the command is: mv /sdcard/0/0/* /sdcard/)

> Or manually move the contects of /sdcard/0/ to /sdcard/ in a file manager

> Or flash the zip from somboons post here:

http://xdaforums.com/showpost.php?p=57058359&postcount=75

Knock On/Double Tap 2 Wake (DT2W) not working?

> Try running this command from terminal emulator

echo "1" > /sys/devices/virtual/input/lge_touch/touch_gesture

(May have to be run after every boot, if so see one of the methods below)

> Need the init.d script for DT2W?

http://xdaforums.com/lg-g2/developm...v4-0-lg-g2-t2948395/post56951929#post56951929

(

If this zip doesn't work

init.d may be broken on your ROM build. Download Universal Init.d from the playstore, enable it, and reboot and it should work. Otherwise see next method.)

> Or install Device Control from the playstore here:

https://play.google.com/store/apps/details?id=org.namelessrom.devicecontrol

(Features > Knock on)

App has other useful features as well!

> Or you can flash Render Kernel for Lollipop (Make sure your variant and ROM build are supported!)

http://xdaforums.com/showpost.php?p=53880675&postcount=2

I can't get data on AT&T or T-Mobile with my VS980?

> Read this thread and flash the zip:

http://xdaforums.com/showthread.php?t=2394689

Roaming bug while on LS980 or VS980 variants?

(A VS980 user reported he lost the ability to send SMS after applying this fix. He restored working SMS by enabling roaming. Just in case you run into this issue)

> Try the following:

Open the dialer and dial *#*#4636#*#* and select "Phone Information" on the menu that pops up. Press the 3 dots menu button. Select "Select radio band". Then select the US band.

(May have to be reapplied after every reboot)

Auto-rotation and/or auto-brightness no longer works?

(Backup your EFS partition in recovery before flashing!!!)

> If your variant is supported you can try flashing the modem for your variant from here (NOT LS980, that variant must be on ZV8 bootloader!):

http://xdaforums.com/showthread.php?t=2705509

Audio distortion on LS980 variant?

> Follow the instructions in this post:

http://xdaforums.com/showpost.php?p=56986665&postcount=2076

I can click record in CM12 Camera or Google Camera to record videos but nothing happens...

> Set the video recording resolution from 4K to 1080p or less. 4K setting let's you push the button but doesn't start recording.

WiFi tethering not working?

> Possible fix, Enter this command into terminal (Thanks to genesixxbf3 for the fix and fma965 for the easy command):

su
settings put global tether_dun_required 0

Device not entering deep sleep?

> Check your devices logcat for "E: qcom_sensors_hal: Error reading SLOW_TIMER (fd=-1) Bad file number" If visible in your logcat, try what this post says:

http://xdaforums.com/showpost.php?p=57148400&postcount=3148

(Download and use an app from the play store such as Build Prop Editor, or edit the build.prop with a file manager.)

Battery draining quickly? (These are general suggestions)

> Toggle data off when connected to WiFi (I use an automate app to do this automatically)

> Toggle WiFi off when not in use

> Toggle NFC off when not in use

> Toggle location off when not in use

> Set location to Battery Saver (Network only mode) if location is needed. Only flip to High Accuracy when using a navigation app. (I use an automate app to do this automatically, plus turn location off when screen is off)

> Change "wifi.supplicant_scan_interval" to a higher interval in build.prop. Its the default WiFi scan time android always performs to check nearby connections and signal strengths. Its in seconds, so 180 would be a WiFi scan every 3 minutes. (Our ROMs default to 15 seconds at the moment)

> Disable "Lift to Wake" in Display settings

> Don't use/Disable/Uninstall Google Fit

> Use Render Kernel for your variant and ROM build http://xdaforums.com/showpost.php?p=53880675&postcount=2

Lag when dialing numbers or pressing buttons? (May apply to >= 11/29 builds of Liquid Smooth)

> Disable "Use NuPlayer (Experimental)" in developer options.

Netflix issues?

> Try flashing the zip from this post:

http://xdaforums.com/showpost.php?p=57260912&postcount=3572

> Or this one, this is the older one.

http://xdaforums.com/showthread.php?p=57001344

Miracast Fix/Possible Chromecast Fix:

> Follow the instructions in this post:

http://xdaforums.com/showpost.php?p=57103874&postcount=2878

Chromecast Fix:

> Use MirrorEnabler from this post:

http://xdaforums.com/showpost.php?p=54062732&postcount=1

Viper4Android issues?

> The following post has all the information you need to know, including the LolliViper flashable zip:

http://xdaforums.com/showpost.php?p=47858556&postcount=1

I've confirmed it works with Play Music with the following settings: SELinux Permissive, Compatibility mode turned on in V4A, and Use NuPlayer turned off in developer options.

Gesture/Swipe typing not working on keyboard?

> Follow instructions in this post.

http://xdaforums.com/showpost.php?p=58118159&postcount=26

Time keeps resetting every reboot?

> Try installing the apk from this post.

http://xdaforums.com/showthread.php?p=48738679

NFC Force Closing at Boot?

Reboot into recovery

Enter file manager

Navigate to /system/app/nfc

Delete the whole nfc folder

Contacts Force Closing When Editing Contact?

(Unfortunately these are not guaranteed fixes. Always backup the original APKs first!)

> Follow the instructions in this post for the contacts apk only:

http://xdaforums.com/showpost.php?p=57000972&postcount=289

> Or try the contacts apk + instructions in this post:

http://xdaforums.com/showthread.php?p=57002358