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From 257c8e8d3b7103973dfdc2665d210c63496be457 Mon Sep 17 00:00:00 2001
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From: Rui Matos <tiagomatos@gmail.com>
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Date: Tue, 6 Oct 2015 21:16:18 +0200
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Subject: [PATCH] monitor-manager-xrandr: Work around spurious hotplugs on Xvnc
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Xvnc turns its outputs off/on on every mode set which makes us believe
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there was an hotplug when there actually wasn't. Work around this by
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requiring new randr configuration timestamps to be ahead of the last
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set timestamp by at least 100 ms for us to consider them an actual
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hotplug.
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---
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src/backends/x11/meta-monitor-manager-xrandr.c | 19 ++++++++++++++++++-
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1 file changed, 18 insertions(+), 1 deletion(-)
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diff --git a/src/backends/x11/meta-monitor-manager-xrandr.c b/src/backends/x11/meta-monitor-manager-xrandr.c
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index b82120af9..4a27b3a14 100644
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--- a/src/backends/x11/meta-monitor-manager-xrandr.c
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+++ b/src/backends/x11/meta-monitor-manager-xrandr.c
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@@ -1484,12 +1484,25 @@ meta_monitor_manager_xrandr_class_init (MetaMonitorManagerXrandrClass *klass)
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#endif
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}
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+static gboolean
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+is_xvnc (MetaMonitorManager *manager)
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+{
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+ unsigned int i;
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+
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+ for (i = 0; i < manager->n_outputs; ++i)
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+ if (g_str_has_prefix (manager->outputs[i].name, "VNC-"))
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+ return TRUE;
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+
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+ return FALSE;
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+}
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+
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gboolean
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meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManagerXrandr *manager_xrandr,
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XEvent *event)
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{
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MetaMonitorManager *manager = META_MONITOR_MANAGER (manager_xrandr);
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gboolean hotplug;
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+ unsigned int timestamp;
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if ((event->type - manager_xrandr->rr_event_base) != RRScreenChangeNotify)
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return FALSE;
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@@ -1498,7 +1511,11 @@ meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManagerXrandr *manager_xra
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meta_monitor_manager_read_current_config (manager);
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- hotplug = manager_xrandr->resources->timestamp < manager_xrandr->resources->configTimestamp;
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+ timestamp = manager_xrandr->resources->timestamp;
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+ if (is_xvnc (manager))
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+ timestamp += 100;
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+
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+ hotplug = timestamp < manager_xrandr->resources->configTimestamp;
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if (hotplug)
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{
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/* This is a hotplug event, so go ahead and build a new configuration. */
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--
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2.12.0
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