On Mon, 2017-01-02 at 18:09 +0100, Pali RohÃr wrote:
On Monday 02 January 2017 16:27:05 Bastien Nocera wrote:
On Sun, 2016-12-25 at 11:04 +0100, Pali RohÃr wrote:
This patch allows user to disable events from any input device so
events
would not be delivered to userspace.
Currently there is no way to disable particular input device by
kernel.
User for different reasons would need it for integrated PS/2
keyboard or
touchpad in notebook or touchscreen on mobile device to prevent
sending
events. E.g. mobile phone in pocket or broken integrated PS/2
keyboard.
This is just a RFC patch, not tested yet. Original post about
motivation
about this patch is there: https://lkml.org/lkml/2014/11/29/92
Having implemented something of that ilk in user-space (we
automatically disable touch devices when the associated screen is
turned off/suspended), I think this might need more thought.
How to implement such thing in userspace? I think you cannot do that
without rewriting every one userspace application which uses input.
What happens when a device is opened and the device disabledthrough
sysfs, are the users revoked?
Applications will not receive events. Same as if input device does
not
generates events.
Does this put the device in suspend in the same way that closingthe
device's last user does?
Current code not (this is just RFC prototype), but it should be
possible
to implement.
Is this not better implemented in user-space at the session level,device?
where it knows about which output corresponds to which input
How to do that without rewriting existing applications?
Is this useful enough to disable misbehaving devices on hardware,so
that the device is not effective on boot?
In case integrated device is absolutely unusable and generates
always
random events, it does not solve problem at boot time.
But more real case is laptop with closed LID press buttons and here
it
is useful.
There's usually a display manager in between the application and the
input device. Whether it's X.org, or a Wayland compositor. Even David's
https://github.com/dvdhrm/kmscon could help for console applications.