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I have installed LineageOS with "stock" version of Open GApps. I noticed Privacy Guard can control which apps have access to which information. I have changed nearly every permission to "ask me" and my system refused to cooperate (was freezing immediately after booting, see similar problem).

Therefore, there must be a critical set of permissions that must be enabled (in Privacy Guard) in order for the system to work properly. What are those permissions?

I am using LineageOS v14.1 (Android 7.1.2).

Note: I do not want to troubleshoot my problem. I need an answer saying "if you block this information for that app or that information for that app your system will stop working". I have solved my problem by flashing the phone again, so I'm safe.

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    Did you apply these changes to system apps too? If yes, that may be the cause of your problem. If you denied Google Play services permissive for instance, it being a core component of OS, you can guess the consequences . Unless you have a deep knowledge of these permissions impact, it is best to leave system apps alone.For user apps it is safe to apply community updated permissions ( pro version ) and fine tune as per needs
    – beeshyams
    Jul 2, 2017 at 19:11
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    @beeshyams no "pro version" an, I'm afraid, no "community permissions". OP asks about CMs/LOS' built-in "Privacy Guard", not about Xprivacy :) But apart from that: full ack, only touch system apps if you know what you're doing.
    – Izzy ♦
    Jul 2, 2017 at 20:09
  • @beeshyams Yes, I have changed system apps permissions, but what I did does not matter (see added note in question). I don't think Google Play services are necessary for LOS to work, since LOS is not shipped with GP services. Also see this - they don't say that GP services are crucial to the system, just for the extra apps. And they can be "disabled" even on non-rooted Android.
    – styrofoam fly
    Jul 2, 2017 at 21:57
  • My mistake - was mixing up with XPrivacy. Sorry. @izzy. Thanks
    – beeshyams
    Jul 2, 2017 at 23:56
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    @styrofoamfly Though GServices might not be essential, there's one problem in your context: they themselves think they're very essential, and are allowed everything – so if you forbid them access to something they see that as "hick-up" and retry until they succeed. Which they of course never can. Thus their constant hammering is slowing down the system. At least I assume that's what happens in your case: you cannot confirm/reject requests in the frequency they happen. "Ask me" delays the operation until user's answer (or timeout). Rather app specific than permission specific.
    – Izzy ♦
    Jul 3, 2017 at 11:59

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