[Xgl/Xegl] Input Devices

[Jon Smirl]

At OLS Jim said he would give some guidance to this work. He has done
a lot of work on X input in the past.

On 7/25/05, Johnson, Charles F <charles.f.johnson at intel.com> wrote:
> This sounds very similar to the XinputHotplug work described by:
> http://xorg.freedesktop.org/wiki/XInputHotplug
> 
> I've been trying to get the status of this work, but have not been able
> to get hold of Kristian Hogsberg.
> 
> Any update on this would be appreciated.
> 
> Thanks.
> 
> Charles Johnson
> Intel Corp.
> charles.f.johnson at intel.com
> 
> -----Original Message-----
> From: xorg-bounces at lists.freedesktop.org
> [mailto:xorg-bounces at lists.freedesktop.org] On Behalf Of Dane Rushton
> Sent: Tuesday, July 19, 2005 1:00 AM
> To: xorg at freedesktop.org
> Subject: [Xgl/Xegl] Input Devices
> 
> Hi All,
> 
> I'm going to have ago at developing the input subsystem for Xegl, and
> possible for other X's.
> I'm in the early research/requirements gathering stage, so I'm after
> some input from the experts and your thoughts on the likely direction of
> input drivers in Linux and other Unix-like OS's.
> I know Jon Smirl has put together a basic system using EVDEV for Xegl.
> The Event Interface (EVDEV) is quite new to Linux, and may not be
> available in other OS's, so is it worth using? Or should it be one of
> several options?
> 
> Xegl is aimed at a Free Desktop that is user friendly and feature rich,
> so most things should "Just Work (tm)" without any configuration except
> when the user is trying to do something advanced.
> 
> The core requirements, as I see them are:
> 1)      Auto-detect devices attached prior to X server initialisation.
>         No config files for basic stuff!
> 2)      Auto-detect devices added or removed during X server run-time.
>         The HAL system available on Linux would be excellent for this,
>         but again it isn't available for other systems yet.
>         What are people's thoughts on utilizing technologies such as
>         HAL?
> 3)      Most workstations and home PC's will want all pointing devices
>         to be combined into a common input. For example a laptop with an
>         integrated touchpad and an attached USB mouse.
>         The default setting should be to detect all pointing devices at
>         startup (and any changes during execution) and just use them.
>         Linux currently has a /dev/input/mice node which combines
>         /dev/input/mouse* devices, but that isn't available in EVDEV
>         (as far as I know) if we go that way.
> 4)      The same should occur for keyboards or other similar devices.
>         Examples are laptops with external keyboards, barcode scanners,
>         left-handed number pads etc.
> 5)      For advanced situations the user may have multiple X server
>         instances running, each with their own screen, keyboard and
>         mouse. This situation is less likely, and would be okay to
>         require manual configuration. In that situation the server will
>         take a list of which devices it can use. I don't know what
>         should happen when devices are added at runtime, i.e. which
>         server should get it etc.
> 
> Additions, corrections, comments and general discussion welcome.
> 
> Cheers
> Dane Rushton
> 
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-- 
Jon Smirl
jonsmirl at gmail.com