[Galaxy S II Q&A, Help & Troubleshooting] androi76:
Upgrading cm-12-20141217-UNOFFICIAL-i9100.zip to latest CM12 build

Hi,

I have a question regarding how to upgrade my Samsung Galaxy S2 GT-I9100 from cm-12-20141217-UNOFFICIAL-i9100.zip (alpha) to the latest build cm-12-20141224-UNOFFICIAL-i9100.zip (beta build) from today ?

I used to have the latest CM11-Nightly kitkat 4.4.4 installed with the included CWRM until 4-5 days ago.

Then I decided to flash my phone to get the Android Lollipop 5.0 instead

From the kk-compatible CWRM I did this:

1) Made a data/factory reset

2) Wiped the cache (partition)

3) Wiped the Dalvik Cache

4) Format the /system partition

and nothing more..(maybe I should have formatted some other partitions too ?: like /data, /boot and /preload etc. ?)

5) Then I flashed the cm-12-20141217-UNOFFICIAL-i9100.zip, which I had downloaded and copied to my SD card.

I did NOT flash the Update-SuperSU-v2.37.zip afterwards as suggested in some youtube videos - is that a problem? and should I have done that ??

But the cm-12-20141217-UNOFFICIAL-i9100.zip has replaced my kitkat compatible CWRM with the new ART based Cyanogen Recovery.

Today I have copied the latest cm-12-20141224-UNOFFICIAL-i9100.zip to the root of my SD card and to the CMUpdater folder on the Internal Storage and I have tried to flash cm-12-20141224-UNOFFICIAL-i9100.zip from both locations with Cyanogen Recovery without luck.

In both cases I get the green android man, it says installing update but it does not

Instead I keep getting the error message:

Install failed

E: Cannot load volume /misc!

E: failed to unmount auto

E: failed to set up expected mounts for install; aborting

Installation aborted.

E: Cannot load volume /misc!

Is there a way for me to easily upgrade from cm-12-20141217-UNOFFICIAL-i9100.zip to the latest cm-12-20141224-UNOFFICIAL-i9100.zip, using the new Cyanogen Recovery because it does not seem to support flashing of .ZIP files. ? I am not so familiar with Odin/Heimdall yet so I am afraid to brick my phone if I try to flash a new CWRM or TWRM recovery or kernel :). I am just a bit cautious, until I am more familiar with rooting and custom ROMs.

Can I install the cm-12-20141224-UNOFFICIAL-i9100.zip using the install from included ADB option somehow or extract the ZIP file and install otherwise ?.

What happens if I use the option "Wipe media" in Cyanogen Recovery ? Would that help ?

After installing the cm-12-20141217-UNOFFICIAL-i9100.zip build, I can use the phone but it is very unstable and the cyanogenmed boot flash logo come and go frequently.

However, It runs much faster and looks much better than the Android KK 4.4.4, so I really want to switch to Android 5.0 for good now :). I did not succeed install the Pa-Gapps either. There was not enough space (for either the stock or mini/micro package) so I don't have gapps installed - only android.

The size of my internal storage was also reduced from 12 or 16 Gb to only 2 Gb /1.97 Gb), when I look at it in the file manager from my PC.

I would be really happy if you have an easy solution to all this ;).

Thanks in advance and sorry about all these questions :)

Best Regards

Jesper