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_NET_WM_FULLSCREEN_MONITORS confused about monitor numbering


Description astrand 2012-10-04 09:01:56 CEST
The monitor numbers in _NET_WM_FULLSCREEN_MONITORS should follow Xinerama/RandR numbers. However, with xfwm4-4.8.3, this is not the case: When _NET_WM_FULLSCREEN_MONITORS=0,0,0,0 is specified, the client is fullscreen over Xinerama/RandR monitor number 1, and vice versa.
Comment 1 Andrew Barbarello 2016-05-02 03:18:26 CEST
Still an issue, the function clientUpdateFullscreenSize in src/client.c retrieves monitor position/size using the function "gdk_screen_get_monitor_geometry", giving the index from _NET_WM_FULLSCREEN_MONITORS as the "monitor_num" argument. The problem is that function uses the GDK monitor numbering scheme (which seems to consistently label monitors [0, 1, ..., n] from left to right) as opposed to the Xinerama numbering scheme (which seems to always assign "0" to the primary monitor, even if it's the right-most one).

As the original bug report states, the window manager should treat the indices specified in _NET_WM_FULLSCREEN_MONITORS as those assigned by Xinerama. The EWHM spec says _NET_WM_FULLSCREEN_MONITORS is a "list of 4 monitor indices indicating the top, bottom, left, and right edges of the window when the fullscreen state is enabled. The indices are from the set returned by the Xinerama extension."
Comment 2 Olivier Fourdan editbugs 2016-05-02 08:35:52 CEST
Yes, you are correct, gdk reorders the outputs.
Comment 3 Git Bot editbugs 2020-05-29 11:52:17 CEST
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Bug #9351

Reported by:
Reported on: 2012-10-04
Last modified on: 2020-05-29


Olivier Fourdan
CC List:
1 user



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