Santiago Gimeno

Hey, can you post sample code that reproduces the issue?

Is another `WM` already running in the same xserver?

That seems to be the problem. I don't know exactly what are you trying to accomplish but only one X11 client can set `SubstructureRedirect` mask in a specific window, and...

Okay, I think I now remember. It's been a long time without using this module. `node-ewmh` as it is now, it's meant to help implementing the [Extended Window Manager Hints](http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html)...

Why do you need `node-ewmh`? If it's only to set the `WM_CLASS` property in a window, then use https://github.com/santigimeno/node-x11-prop#set-property and avoid all the problems.

I would say if you're not implementing a window manager which you're not, I would not use `node-ewmh`.

Or you can always modify it so it suits your use case.

Can you test if https://github.com/santigimeno/node-pcsclite/pull/96 fixes the issue? Completely untested patch

No, I hadn't thought of it. Do you have a specific API in mind? I guess you'd like a sync version of the CardReader functions, right?

@rkalkani sorry this PR fell through the cracks. Let me take a look at it and if it's fine I'll merge it.