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-rw-r--r--xserver/configure.ac4
1 files changed, 4 insertions, 0 deletions
diff --git a/xserver/configure.ac b/xserver/configure.ac
index a5971dca8..3c721ec71 100644
--- a/xserver/configure.ac
+++ b/xserver/configure.ac
@@ -439,6 +439,10 @@ case $host_os in
AC_DEFINE(CSRG_BASED, 1, [System is BSD-like])
AC_DEFINE(PCVT_SUPPORT, 1, [System has PC console])
AC_DEFINE(WSCONS_SUPPORT, 1, [System has wscons console])
+ # Disable use of SIGIO by default; it breaks multi-card
+ # configurations. We don't want to run thousands of lines of
+ # potentially signal-unsafe code for no particular benefit.
+ USE_SIGIO_BY_DEFAULT="no"
KDRIVE_HW=yes
;;
*linux*)