From 0af0c75dc60166d2755537b8499e9e4a1501e4a8 Mon Sep 17 00:00:00 2001

From: Ray Strode <rstrode@redhat.com>

Date: Tue, 15 Jan 2019 10:29:55 -0500

Subject: [PATCH 5/9] backends/native: emit gl-video-memory-purged when

 becoming active

The proprietary NVIDIA driver garbles memory on suspend.  In order

to work around that limitation, mutter needs to refresh all its

textures on resuem.

This commit lays the way toward doing that by emitting the

"gl-video-memory-purged" signal when the compositor becomes active

by logind (which happens on VT switch and on resume).

---

 src/backends/native/meta-backend-native.c | 7 +++++++

 1 file changed, 7 insertions(+)

diff --git a/src/backends/native/meta-backend-native.c b/src/backends/native/meta-backend-native.c

index 042d96ec6..f87c5a066 100644

--- a/src/backends/native/meta-backend-native.c

+++ b/src/backends/native/meta-backend-native.c

@@ -618,44 +618,51 @@ meta_activate_session (void)

       g_warning ("Could not activate session: %s\n", error->message);

       g_error_free (error);

       return FALSE;

     }

   return TRUE;

 }

 void

 meta_backend_native_pause (MetaBackendNative *native)

 {

   MetaBackend *backend = META_BACKEND (native);

   MetaMonitorManager *monitor_manager =

     meta_backend_get_monitor_manager (backend);

   MetaMonitorManagerKms *monitor_manager_kms =

     META_MONITOR_MANAGER_KMS (monitor_manager);

   clutter_evdev_release_devices ();

   clutter_egl_freeze_master_clock ();

   meta_monitor_manager_kms_pause (monitor_manager_kms);

 }

 void meta_backend_native_resume (MetaBackendNative *native)

 {

   MetaBackend *backend = META_BACKEND (native);

   MetaMonitorManager *monitor_manager =

     meta_backend_get_monitor_manager (backend);

   MetaMonitorManagerKms *monitor_manager_kms =

     META_MONITOR_MANAGER_KMS (monitor_manager);

+  MetaDisplay *display = meta_get_display ();

+  ClutterBackend *clutter_backend = clutter_get_default_backend ();

+  CoglContext *cogl_context =

+    clutter_backend_get_cogl_context (clutter_backend);

   ClutterActor *stage;

   MetaIdleMonitor *idle_monitor;

+  if (cogl_has_feature (cogl_context, COGL_FEATURE_ID_UNSTABLE_TEXTURES))

+    g_signal_emit_by_name (display, "gl-video-memory-purged");

+

   meta_monitor_manager_kms_resume (monitor_manager_kms);

   clutter_evdev_reclaim_devices ();

   clutter_egl_thaw_master_clock ();

   stage = meta_backend_get_stage (backend);

   clutter_actor_queue_redraw (stage);

   idle_monitor = meta_backend_get_idle_monitor (backend, 0);

   meta_idle_monitor_reset_idletime (idle_monitor);

 }

-- 

2.18.1