Hardware Webrender stops working on nVidia GPU with Bug 1875369.
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Mozilla claims that if a XWindow doesn't have mIsMapped, then
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hardware WebRender should be disabled. There is a crashing bug if moving tabs.
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Some info here at https://bugzilla.mozilla.org/show_bug.cgi?id=1882021
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--- firefox-124.0/widget/gtk/nsWindow.cpp.~1~ 2024-02-26 08:15:39.000000000 -0500
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+++ firefox-124.0/widget/gtk/nsWindow.cpp 2024-02-28 23:27:47.907263416 -0500
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@@ -5809,7 +5809,9 @@
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}
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void nsWindow::EnsureGdkWindow() {
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+/* this causes firefox to crash: Assertion failure: mIsMapped
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MOZ_DIAGNOSTIC_ASSERT(mIsMapped);
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+*/
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if (!mGdkWindow) {
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mGdkWindow = gtk_widget_get_window(GTK_WIDGET(mContainer));
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g_object_set_data(G_OBJECT(mGdkWindow), "nsWindow", this);
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@@ -9538,6 +9540,7 @@
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nsCString displayName;
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LOG("nsWindow::GetCompositorWidgetInitData");
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+ EnsureGdkWindow();
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*aInitData = mozilla::widget::GtkCompositorWidgetInitData(
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GetX11Window(), displayName, GetShapedState(), GdkIsX11Display(),
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