diff options
authorBartosz Brachaczek <>2009-11-13 00:18:00 +1000
committerPeter Hutterer <>2009-11-19 09:24:46 +1000
commitc1f16a4f59a584ab4546c2f16e20b06703042057 (patch)
parenta0f7f34dc5effc5822c618bfbf3a0872669c30ad (diff)
Set all valuators for relative motion events (#24737)
We should process all the deltas reported by a relative motion device, otherwise some devices such as A4Tech X-750F or similar may trigger a situation when the `v` array contains random values (it isn't initialized anywhere) and later we process them and in effect the mouse cursor "jumps" on the screen. I'm not sure why, but we also must be sure that the `first` and `last` variables reflect the axis map, otherwise the mouse cursor "jumps" on the screen when clicking mouse buttons in some rare cases reported by Bartek Iwaniec on Bugzilla. That's why a simple initialization of the `v` array with zeros isn't sufficient. X.Org Bug 24737 <> Signed-off-by: Bartosz Brachaczek <> Signed-off-by: Peter Hutterer <>
1 files changed, 1 insertions, 1 deletions
diff --git a/src/evdev.c b/src/evdev.c
index 06ea83b..81a0bd5 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -375,7 +375,7 @@ EvdevProcessValuators(InputInfoPtr pInfo, int v[MAX_VALUATORS], int *num_v,
for (i = 0; i < REL_CNT; i++)
int map = pEvdev->axis_map[i];
- if (pEvdev->delta[i] && map != -1)
+ if (map != -1)
v[map] = pEvdev->delta[i];
if (map < first)