[Bug 220722] Non existent battery reporting for a laptop with touchscreen MSI

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220722

--- Comment #15 from ggrundik@gmail.com ---
> And probably also hot unplug it when the stylus goes out of range. I would
> say patches welcome.

That would not be possible: as I said, touchscreen just remembers last know
status, so if stylus goes out of range, panel continues to report that last
value. There are no event of "stylus is out of range", since "the range" is
about half an inch or less, and getting in and out of it is a regular thing. As
I can see in HID sniffing, the only event is "stylus current status is", with
position, orientation, buttons and battery status, all in the same message.

> Yes, fixing this in upower might also be a solution, see:
> https://gitlab.freedesktop.org/upower/upower/-/issues/197 for an existing
> upower issue.

I see. And that issue is closed wont move, since kernel "fixed" the problem.
Thank you for this wisest nuclear solution, oh dear.

> Patches to properly solve this are welcome

I can only repeat: this was a correctly working situation: kernel was doing
perfectly fine, forwarding device status reported by the device. Device is
working fine, reporting everything it has as best as it could. Handling all
this data with its quirks is not the kernel's business, but userspace.

So removing this metric is a regression, please revert it.

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