Comment 9 for bug 1813463

https://bugzilla.kernel.org/show_bug.cgi?id=202429

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We were able to successfully enable our BT device in the system after boot up, which points to something in system boot/power sequence preventing BT from enabling.

The RTK 3rd party module exhibited the same behavior as our Intel module, which points to a system level setting that doesn’t allow for any device to be used other than what ships with the platform (Qualcomm card) – thought to be likely due to BIOS or Linux Kernel rule setting.

We checked with Lenovo as they used to have a BIOS setting that wouldn’t allow another adapter to work (called mutual authentication), but this was removed a few years ago.

Unfortunately we cannot debug any further on this as we do not have access to the proprietary code needed to do further debug. Our best recommendation is to take the engineering debug analysis we have been able to provide above and contact Lenovo to determine if they will conduct further testing to determine the boot/power up setting that is preventing the BT from being enabled.
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