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authorEli Zaretskii <eliz@gnu.org>2016-05-21 10:19:32 +0300
committerEli Zaretskii <eliz@gnu.org>2016-05-21 10:19:32 +0300
commit30989a0ae1923b4466cf4902a5ac009fc1d2fdad (patch)
tree0e298fa5c5f8a5c769a9b74ebd6f77ea773e3414
parent421e3c4b2f14cfdf84a07095be1cbc76c9038da0 (diff)
downloademacs-30989a0.tar.gz
Mention GTK+ problems in etc/PROBLEMS
* etc/PROBLEMS (GDK_SCALE, GDK_DPI_SCALE): Mention the possible problems this could create and the workaround. (Bug#23587)
-rw-r--r--etc/PROBLEMS15
1 files changed, 15 insertions, 0 deletions
diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index 8733095c8d4..31f38e3980d 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -940,6 +940,21 @@ into Meta. This is because of the great importance of Meta in Emacs.
** 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.
This happens sometimes when using Metacity. Resizing Emacs or ALT-Tab:bing