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https://issues.apache.org/jira/browse/MYNEWT-857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16422915#comment-16422915
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Lance Cohen commented on MYNEWT-857:
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Hi [~jerobi], sounds like your experience with the iPhone X is fairly binary
w.r.t commenting out that line that Chris suggested. Our experience is
unfortunately not super easy to replicate its very intermittent / random. One
thing we did notice while trying to capture the packet sequence leading up to
and upon entering the BT "hang" state is there are *no* BT packets that are
transmitted from the iPhone - so its seems like the stack in this state is
permanently wedged until BT is restarted as you mentioned. Unfortunately,
capturing the sequence leading up to the hang has proven to be elusive.
> BLE Controller - incompatibility with iPhone 8 (and iPhone X?)
> --------------------------------------------------------------
>
> Key: MYNEWT-857
> URL: https://issues.apache.org/jira/browse/MYNEWT-857
> Project: Mynewt
> Issue Type: Task
> Security Level: Public(Viewable by anyone)
> Components: Nimble
> Reporter: Christopher Collins
> Priority: Major
> Labels: NimBLE
> Fix For: v1.3
>
> Attachments: ios2nimble-no-feat.pcap, ios2nimble.pcap,
> nimble_ios_1033.btt, nimble_ios_1103.btt
>
>
> Master: iPhone running iOS 11
> Slave: NimBLE device
> The iPhone successfully establishes a connection to the NimBLE device, but
> the CoreBluetooth {{didConnect()}} callback does not get called. A packet
> trace (see attached {{ios2nimble.pcap}} file) shows that the iPhone never
> initiates service discovery.
> The problem seems to occur when the NimBLE controller initiates the Feature
> Exchange Procedure immediately after connection establishment. The
> {{LL_SLAVE_FEATURE_REQ}} PDU appears to cause a problem for the iOS device.
> When I comment out the call to {{ble_ll_ctrl_proc_start()}} at the bottom of
> {{ble_ll_conn_created()}}, the iOS device is able to connect and perform
> service discovery, resulting in the CoreBluetooth callback being executed.
> In the attached pcap file {{ios2nimble.pcap}}, the CONNECT_REQ is at packet
> #6211.
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