Tag: Lineage OS

Lineage OS Fix: After reboot phone not usable anymore (Only back button/statusbar visible)

Sadly, my Nexus 4 (mako) had a rough experience after upgrading to Lineage OS: After a reboot, I ended up with this screen:

As you can see, only the back button and status bar are visible anymore, I can drag down the status bar and enable / disable stuff but cannot launch the settings or anything else - brick'd :(. I had to reinstall that thing several times, but then came to the conclusion what caused the error: I had enabled a screenlock (does not matter which kind :)) and played with the System Profile under Settings. I created a second System Profile which - as soon as it connected to my Home Wifi, removed the screenlock. And that was the problem. After two additional reboots, the error as seen manifested.

Good news: It only took me three complete reinstalls (read: wipe... ^^') to get that - and the fix is very simple: Don't create such an System profile. If you have and you end up there, that is no problem as well: If you have adb Debug enabled, you'll have it fixed in one minute and one reboot:

# open your CMD / Bash
adb shell
# activate root
su
# go to the correct folder
cd /data/system/
# get your current profile config
cat profiles.xml
# now grab that config file, remove the <profile> </profile>
# part which causes the error -> your newly created profile
# with "auto turnoff screenlock"
# after that, put it back on your phone
echo 'HERESHOULDBETHENEWCONFIG' > profiles.xml
# then reboot your phone
reboot

If you have no root access available you could get root on your device via the addon from Lineage OS, and if you don't want that (which is good too!) or you got no ADB Debug enabled - fix it from within TWRP :).

PS: If you want to report something, always pass along your logcat (extract with adb logcat -d '*:V' > logcat.txtif you got adb access)

Nexus 4 / Nexus 7 CrossUpgrade from Cyanogenmod to Lineage OS

EDIT: Experimental Builds were deleted now, as initial stated by LineageOS Team in this post. CrossUpgrade is not possible anymore, best bet would be to wipe the device and start from scratch. So just skip the second step with EXP Image and WIPE EVERYTHING in TWRP and install the latest nightly. Please also stay alert on bugs which are included in LineageOS. This link will give you access to the unresolved section of the Nexus 4 / Mako device, while this link will give you access to the same for the Nexus 7 2013 Wifi / flo :). Also, you can find the latest changes for mako here and for flo here.

As CyanogenMod ended their services - and Lineage OS took over, we need to cross-upgrade to the new system.

0.) Basic idea:
To upgrade to Lineage OS, they setup an so called experimental image. This exp image exists soley for the reason of migrating old CM installations to LOS installations. An really ugly-nag-screen will remind you of that. So the upgrade path will be: CM -> LOS Exp -> LOS Nightly. Also, you need to upgrade to the correct version. I.e. LOS does supply Nexus 7 LOS 14.1 images, so you need to upgrade your Nexus 7 first to CM 14.1, then install the LOS Exp 14.1, then the LOS Nightly 14.1

1.) Nexus 4 (mako)
- Install latest TWRP Version: https://twrp.me/devices/lgnexus4.html
- Make sure your device is on CM 14.1, if not, upgrade via: https://download.cyanogenmod.org/?device=mako
- Download LOS 14.1 Exp and install via TWRP (clean caches!) and reboot: https://download.lineageos.org/mako
- Download LOS 14.1 Nightly and install via TWRP (clean caches!): https://download.lineageos.org/mako

2.) Nexus 7 2013 Wifi (flo)
- Install latest TWRP Version: https://twrp.me/devices/asusnexus72013wifi.html
- Make sure your device is on CM 14.1, if not, upgrade via: https://download.cyanogenmod.org/?device=flo
- Download LOS 14.1 Exp and install via TWRP (clean caches!) and reboot: https://download.lineageos.org/flo
- Download LOS 14.1 Nightly and install via TWRP (clean caches!): https://download.lineageos.org/flo

And thats it! 🙂

More Infos needed? Just check out this older blog entry - you can use 2) and 3) but please do not delete anything except caches on 3) - and you do not need to flash GAPPS - as we want to upgrade, not reinstall from scratch 🙂