[Wayland-bugs] [Bug 91563] libinput keep open motion sensor input device

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91563

--- Comment #7 from Bastien Nocera <bugzilla at hadess.net> ---
(In reply to Matthieu Gautier from comment #6)
> Created attachment 118007 [details]
> patch to add to linux tree, to add INPUT_PROP_ACCELEROMETER
> 
> Sorry for my silence but, as said Bastien, I was away.
> (And, as I'm leaving again, I'll be silent for the next few weeks..)
> 
> 
> Indeed, the tag INPUT_PROP_ACCELEROMETER is missing in applesmc. Adding it
> [1] doesn't fix the problem. It shows that it is more complex that it seems
> ...

The problem is that it's not an accelerometer, it only has 2 axis.

> With the tag INPUT_PROP_ACCELEROMETER, a recent systemd version (>219, the
> fedora22 version[2]) properly add the udev ID_INPUT_ACCELEROMETER=1 tag.
> 
> With this tag, libinput still open the device.

It shouldn't though.

> However, it seems to be the
> right thing to do. Gnome(-shell?) now detect the device is a accelerometer
> and display a button to deactivate screen rotation, so we should keep the
> device open.

That would be iio-sensor-proxy opening it (once) and letting go of it until it
receives a kevent saying it's changed coarse orientation (which we'll never
receive because the driver doesn't send it).

I think that libinput should just ignore it. Is there a udev tag for that?

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