diff options
authorHiltjo Posthuma <hiltjo@codemadness.org>2019-05-17 13:00:10 +0200
committerHiltjo Posthuma <hiltjo@codemadness.org>2019-05-17 13:00:10 +0200
commitcaa1d8fbea2b92bca24652af0fee874bdbbbb3e5 (patch)
parentf1546cf9c1f9fc52d26dbbcf73210901e83c7ecf (diff)
FAQ: add entry about color emoji Xft bug
This has been asked many times on IRC and the mailinglist. Make it easier to find information about this particular Xft issue by adding it to the FAQ.
1 files changed, 27 insertions, 0 deletions
diff --git a/FAQ b/FAQ
index 921c493..ecf7af8 100644
--- a/FAQ
+++ b/FAQ
@@ -165,3 +165,30 @@ Apply [1].
[1] http://st.suckless.org/patches/delkey
+## BadLength X error in Xft when trying to render emoji
+Xft makes st crash when rendering color emojis with the following error:
+"X Error of failed request: BadLength (poly request too large or internal Xlib length error)"
+ Major opcode of failed request: 139 (RENDER)
+ Minor opcode of failed request: 20 (RenderAddGlyphs)
+ Serial number of failed request: 1595
+ Current serial number in output stream: 1818"
+This is a known bug in Xft (not st) which happens on some platforms and
+combination of particular fonts and fontconfig settings.
+See also:
+The solution is to remove color emoji fonts or disable this in the fontconfig
+XML configuration. As an ugly workaround (which may work only on newer
+fontconfig versions (FC_COLOR)), the following code can be used to mask color
+ FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
+Please don't bother reporting this bug to st, but notify the upstream Xft
+developers about fixing this bug.