Originally Posted by ncc11
Cause I'm still not allowed to write to the "Galaxy Nexus Android Development" I write here:
After dirty upgrading my maguro CM11 from M10 to M11 ([ROM] [NIGHTLY] [4.4.4] CyanogenMod 11 for Samsung Galaxy Nexus) WiFi is broken.
The WLAN Symbol remains in the Status bar, no data connection. It is possible to switch off wlan and get a mobile data connection, but it is not possible to switch wlan on again. The WLAN Switch stays grey or doesn't save its status.
What I have already done:
- Fix permissions - no success.
- Wipe Dalvik + Cache no success
- deinstall touch control before flashing M11 - no success.
- Trying newest nighlty 10/09 - no success.
- Nandroid back to M10. WLAN is ok.
- Upgrading TWRP to 126.96.36.199 (from 188.8.131.52) and flashing M11 - no success.
I dont want to make a factory reset, cause I dont want to loose music, pictures, app data.
Anyone else with this problem? Any hint?
A factory reset in TWRP (which includes dalvik, cache, & data), will NOT wipe your music and pictures. (It can't hurt to wipe system too, although in most cases that's done automatically when you flash a ROM.) What you do NOT want to wipe is "internal storage", which is where your pictures, music, etc. is stored. You can find more info here: http://teamw.in/whattowipe
Knowing this, I'd recommend making a nandroid and then clean flashing M11 just to test out whether WiFi works properly on M11 or not. If it does work this way, then you know it was the dirty flash that caused the problems. Either way, when you're done testing you can revert back to your nandroid and have everything intact, including your app data.
Also, a factory reset in TWRP would indeed wipe your app data, but you can easily back up all your app data with Titanium Backup and restore it after the clean flash. This looks like a pretty good guide for Titanium Backup for Noobs: