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-rw-r--r--src/evdev.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/evdev.c b/src/evdev.c
index 94f5499..aec1447 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -1283,6 +1283,15 @@ EvdevAddAbsValuatorClass(DeviceIntPtr device, int want_scroll_axes)
num_axes--;
}
}
+
+ /* device only has mt-axes. the kernel should give us ABS_X etc for
+ backwards compat but some devices don't have it. */
+ if (num_axes == 0 && num_mt_axes > 0) {
+ xf86IDrvMsg(pInfo, X_ERROR,
+ "found only multitouch-axes. That shouldn't happen.\n");
+ goto out;
+ }
+
#endif
#ifdef HAVE_SMOOTH_SCROLLING