X loses wireless input devices

[Yan Seiner]

Peter Hutterer wrote:
> On Mon, Jun 11, 2012 at 06:02:48PM -0700, Yan Seiner wrote:
>   
>> Peter Hutterer wrote:
>>     
>>> On Sat, Jun 09, 2012 at 07:45:53AM -0700, Yan Seiner wrote:
>>>       
>>>> I have a multiseat setup where 2 of the seats use wireless mice and
>>>> keyboards.  After some random time measured in hours/days, those two
>>>> seats "lose" the input devices.  They become non-responsive.  The
>>>> LEDs on the hardware light up so I know the mice and keyboards are
>>>> awake and sending signals, but the X session itself does not
>>>> respond.  There is nothing interesting in the log files.  the one
>>>> seat with wired devices is fine.
>>>>
>>>> If I kill that X client and let kdm restart it, it will work fine
>>>> for a while.  What information can I provide to help diagnose this?
>>>>         
>>> you've disabled hotplugging, so if the device disappears at the kernel level
>>> at any point in time, it will not come back until you've restarted the
>>> server (VT switch should do too, btw). that is my suspicion here though that
>>> should usually print read errors to the logs. there isn't really much you
>>> can do about this, the old device model doesn't really lend itself for
>>> hotplugging.
>>>       
>> By hotplugging you mean setting Option "AutoAddDevices" "true"?  If
>> I do that, every input device gets assigned to every seat, so that
>> keyboard attached to seat 1 also shows up on seats 2 and 3, and
>> every mouse moves every cursor.
>>
>> Is there any way to limit the pool of "AutoAddDevices" so that it
>> works correctly with multi-seat?
>>     
>
> 1.12 has the ID_SEAT support, so if you set that property through udev the
> server only adds the matching ones. You'd have to then start the X server
> with -seat, see the commit message to
> 159b03e13760920274b573a2bccdbf6a79f059e7 for some detail.
>
>   
Awesome!  I'll look into it when I get the chance.

That sounds like the solution I need.  Let me read up on it and I may 
come back with more Qs.  :-)

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