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From ad61347e9d92380fbbb4effd8a19349777d76715 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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.../x11/meta-monitor-manager-xrandr.c | 25 ++++++++++++++++++-
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1 file changed, 24 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 dbe3e4e3b..90a3952db 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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@@ -1058,6 +1058,24 @@ meta_monitor_manager_xrandr_class_init (MetaMonitorManagerXrandrClass *klass)
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g_quark_from_static_string ("-meta-monitor-xrandr-data");
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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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+ MetaMonitorManagerXrandr *manager_xrandr =
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+ META_MONITOR_MANAGER_XRANDR (manager);
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+ GList *l;
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+
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+ for (l = meta_gpu_get_outputs (manager_xrandr->gpu); l; l = l->next)
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+ {
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+ MetaOutput *output = l->data;
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+
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+ if (g_str_has_prefix (output->name, "VNC-"))
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+ return TRUE;
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+ }
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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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@@ -1067,6 +1085,7 @@ meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManagerXrandr *manager_xra
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XRRScreenResources *resources;
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gboolean is_hotplug;
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gboolean is_our_configuration;
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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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@@ -1078,7 +1097,11 @@ meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManagerXrandr *manager_xra
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gpu_xrandr = META_GPU_XRANDR (manager_xrandr->gpu);
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resources = meta_gpu_xrandr_get_resources (gpu_xrandr);
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- is_hotplug = resources->timestamp < resources->configTimestamp;
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+ timestamp = resources->timestamp;
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+ if (is_xvnc (manager))
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+ timestamp += 100;
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+
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+ is_hotplug = timestamp < resources->configTimestamp;
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is_our_configuration = (resources->timestamp ==
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manager_xrandr->last_xrandr_set_timestamp);
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if (is_hotplug)
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--
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2.17.0
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