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From 05bf09ea4aa5a7dc22869075ea2096c4a293d70d Mon Sep 17 00:00:00 2001
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From: Jeff Smith <whydoubt@gmail.com>
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Date: Wed, 31 Jan 2018 23:27:19 -0600
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Subject: [PATCH] backends/x11: Fix time-comparison bug causing hang
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A comparison in translate_device_event() does not account for the fact
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that X's clock wraps about every 49.7 days. When triggered, this causes
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an unresponsive GUI.
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Replace simple less-than comparison with XSERVER_TIME_IS_BEFORE macro,
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which accounts for the wrapping of X's clock.
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Closes: https://gitlab.gnome.org/GNOME/mutter/issues/12
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---
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src/backends/x11/meta-backend-x11.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/backends/x11/meta-backend-x11.c b/src/backends/x11/meta-backend-x11.c
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index 233532435..f447f785f 100644
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--- a/src/backends/x11/meta-backend-x11.c
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+++ b/src/backends/x11/meta-backend-x11.c
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@@ -112,7 +112,7 @@ translate_device_event (MetaBackendX11 *x11,
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if (!device_event->send_event && device_event->time != CurrentTime)
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{
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- if (device_event->time < priv->latest_evtime)
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+ if (XSERVER_TIME_IS_BEFORE (device_event->time, priv->latest_evtime))
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{
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/* Emulated pointer events received after XIRejectTouch is received
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* on a passive touch grab will contain older timestamps, update those
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--
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2.17.1
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