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Mention GTK+ problems in etc/PROBLEMS

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* etc/PROBLEMS (GDK_SCALE, GDK_DPI_SCALE): Mention the possible
problems this could create and the workaround.  (Bug#23587)
This commit is contained in:
Eli Zaretskii 2016-05-21 10:19:32 +03:00
parent 421e3c4b2f
commit 30989a0ae1
1 changed files with 15 additions and 0 deletions
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etc/PROBLEMS
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@ -940,6 +940,21 @@ into Meta. This is because of the great importance of Meta in Emacs.
** Window-manager and toolkit-related problems ** Window-manager and toolkit-related problems
*** Emacs built with GTK+ toolkit produces corrupted display on HiDPI screen
This can happen if you set GDK_SCALE=2 in the environment or in your
'.xinitrc' file. (This setting is usually accompanied by
GDK_DPI_SCALE=0.5.) Emacs can not support these settings correctly,
as it doesn't use GTK+ exclusively. The result is that sometimes
widgets like the scroll bar are displayed incorrectly, and frames
could be displayed "cropped" to only part of the stuff that should be
displayed.
The workaround is to explicitly disable these settings when invoking
Emacs, for example (from a Posix shell prompt):
$ GDK_SCALE=1 GDK_DPI_SCALE=1 emacs
*** Metacity: Resizing Emacs or ALT-Tab causes X to be unresponsive. *** Metacity: Resizing Emacs or ALT-Tab causes X to be unresponsive.
This happens sometimes when using Metacity. Resizing Emacs or ALT-Tab:bing This happens sometimes when using Metacity. Resizing Emacs or ALT-Tab:bing