I just installed Cyanogenmod 13 and a couple of Google Apps (the OpenGApps Micro Package) on a Nexus 4 mako Device. Trying to disable battery optimization for some apps, I found that in the batter settings screen I cannot select Battery optimization from the action menu. The item is simply not clickable. One can reach the battery optimization screen from Settings -> Apps -> Settings -> battery optimization, too, but then the selector going from not optimized to all apps is not clickable.

Am I missing some dependency or is this a bug? I have recovered some system settings by TitaniumBackup, maybe something was incompatible with CM? (Before, I ran an AOSP marshmallow rom, too).


Also running CM13 on Nexus 4, with the difference being no GAPPS. The 2 entry points you mentioned works just fine here.

Try a clean flash without restoring settings using TiBu - CM uses a slightly different settings provider from AOSP and it might prove incompatible indeed.

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  • Hi, after fiddling around a while I think a clean reflash is the only option. Damn, I hate restoring everything all the time. Thank you for your comment.
    – janoliver
    Oct 17 '16 at 7:44
  • @janoliver Well that's the price to pay if you constantly switch ROMs...
    – Andy Yan
    Oct 17 '16 at 7:46
  • I am not doing that constantly, but yeah. :/
    – janoliver
    Oct 17 '16 at 7:47

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