Re: Fix? ShuttlePROv2 jog dial reports EV_REL events with absolute position event values

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On Thu, Feb 06, 2014 at 04:53:46PM +0000, TheDiveO wrote:
> I have a ShuttlePRO v2 (Contour Design Inc) that identifies itself as a USB
> HID. The kernel properly detects its and I can receive events from the
> device. The ShuttlePRO v2 is a media controller for use with video editing
> software, et cetera. It has a jog dial for frame-by-frame movement. Next, it
> has a so-called shuttle, which is ring around the dial, but separate from
> it. The shuttle can be turned CW and CCW up to 7 positions and a spring
> ensures it returns to its center position when you take your hand off of it.
> The shuttle is used to play forwards or backwards, with varying speed.
> Finally, there are 15 buttons on the ShuttlePRO v2.
> 
> However, there is an annoying quirk of which I don't at this time where it
> comes from. The Linux event/input system does not report when the shuttle
> returns to its home/center position. It seems as if the event sent by the
> device gets swallowed. I know that the device sends such an event, as in
> Windows there is no such problem. Similar, when turning the jog dial, every
> 256th position gets swallowed as well.
> 
> I suspect the device manufacturer to have messed up this, but I may be
> wrong. Anyway, I'm looking for help to get around this annoying quirk.

You might want to ask this on the linux-input mailing list, the
developers there will know how to switch this to the proper event type
you need.

thanks,

greg k-h
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