device/device-lg-bullhead: disable 2 cpu's to prevent bootlooping

Quite a few Nexus 5X devices have the tendency to bootloop after a while of being on, iirc because it overheats. This has been a known issue for quite some time, and most Android ROM's for it have measures in place to prevent this, in the form of disabling some CPU cores (iirc "Big cores" or something like that). My Nexus 5X is also subject to this issue.

According to @craftyguy, resolving this is as easy as changing the boot command to not use those CPU cores. This PR does exactly that. It should probably be made optional for people with this device without that issue, but since I have no clue how to do that atm, this is the safest for now.

added 1 commit

• 9d46b664 - device/device-lg-bullhead: disable 2 cpu's to prevent bootlooping

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By Bart Ribbers on 2019-01-09T19:38:19

I don't have a way to test this (patch + pmos) on my N5X, but I am running this on my N5X with lineageos and it 'resolved' the bootloop issue.

By clayton craft on 2019-01-09T19:44:33

approved this merge request

By clayton craft on 2019-01-09T19:44:36

Change looks good to me. @PureTryOut: just to make sure, have you tested, that it still boots?

By Oliver Smith on 2019-01-10T08:58:42

Huh, it seems I can't actually create a device image anymore to test this. Made #166 (closed) for it.

By Bart Ribbers on 2019-01-11T00:00:39

I was finally able to test it properly, it boots fine. I was able to confirm with htop that only 4 CPU's are being used.

By Bart Ribbers on 2019-01-20T11:39:31

mentioned in commit 0746e147

By Bart Ribbers on 2019-01-23T08:55:53

added 48 commits

• 9d46b664...dca30e4e - 47 commits from branch master
• 0746e147 - device/device-lg-bullhead: disable 2 cpu's to prevent bootlooping (!139 (merged))

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By Oliver Smith on 2019-01-23T08:55:53

changed the description

By Oliver Smith on 2019-01-23T08:56:11

approved this merge request

By Oliver Smith on 2019-01-23T08:56:16

enabled an automatic merge when the pipeline for 0746e147 succeeds

By Oliver Smith on 2019-01-23T08:56:19

merged

By Oliver Smith on 2019-01-23T08:58:48

mentioned in commit 0d0fc75f

By Bart Ribbers on 2019-02-14T19:42:55