How can I view the WMClass attribute of a window in Xorg (linux)?

Question

I am trying to find a workaround for incorrect grouping of windows in Docky, and I believe the problem lies with the WMClass attribute that is set for each window. However, I do not know how to view this attribute for open windows. Is there any way to do this?

score 96 · Accepted Answer · edited Oct 18 '16 at 21:35

96

In a terminal, run

 xprop WM_CLASS

and then click the window in question.

edited Oct 18 '16 at 21:35

Kamil Maciorowski

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answered May 18 '10 at 12:18

akira

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`WM_CLASS: not found.` – phil294 May 26 '17 at 03:02
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@Blauhirn run xprop without arguments, you'll get all the properties (and should find WM_CLASS in there, if it's defined) – draeath May 26 '17 at 13:30
WHen i run this command the cursor only works when i click on the desktop. But when i click on the windows it doesn't work. – Maxrunner Mar 14 '18 at 11:51

maoamid · Answer 2 · 2018-10-10T20:28:22.893

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it's an old problem, look here: bug reported

edited Oct 10 '18 at 20:28

answered Oct 10 '18 at 20:21

maoamid

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I do not get it – Pierre.Vriens Oct 10 '18 at 20:26
@Pierre I pasted by mistake something else, I edited my answer – maoamid Oct 10 '18 at 20:30

How can I view the WMClass attribute of a window in Xorg (linux)?

2 Answers2