On 12/24/19 9:06 PM, You-Sheng Yang wrote:
> What's inside other wmi_bus-PNP0C14* folders?
/sys/class/wmi_bus/wmi_bus-PNP0C14\:01
7430019A-DCE9-4548-BAB0-9FDE0935CAFF device
FCB424F1-075A-4E0E-BFC4-62F3E71771FA  subsystem
7FF47003-3B6C-4E5E-A227-E979824A85D1
E2BE5EE3-42DA-49DB-8378-1F5247388202 
power                                 uevent

/sys/class/wmi_bus/wmi_bus-PNP0C14\:02
85D2E869-365A-4ACE-A4D3-CD692B1698A0
8F4D3679-749E-4479-9B16-C62601FD25F0  device  power  subsystem uevent

/sys/class/wmi_bus/wmi_bus-PNP0C14\:03
40D1BF71-A82D-4E59-A168-3985E03B2E87
D9F41781-F633-4400-9355-601770BEC510  power      uevent
431F16ED-0C2B-444C-B267-27DEB140CF9C  device
> By previous experience, BIOS vendor may implement some WMI interface
> that can be used to control anything they want. Somehow such interfaces
> could be misused on Linux as they're mostly designed for Windows. For
> example, 86CCFD48-205E-4A77-9C48-2021CBEDE341 is for controlling Intel
> thunderbolt power, and it should not appear on a platform without
> thunderbolt ports. When it goes wrong, the most appropriate solution
> should be in the BIOS side, so looking for new BIOS updates should be
> the first thing you wanna try, but sometimes you can only try work
> arounds like removing fwupd/boltd or so.
>

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https://bugs.launchpad.net/bugs/1857307

Title:
  Wireless wouldn't turn on.

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