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From: Antonio Larrosa <alarrosa@suse.com>
Subject: Disable GPU when using nouveau or running on wayland
References: boo#1005323, boo#1060990
Qt WebEngine uses multi-threaded OpenGL, which nouveau does not support.
It also crashes when running on wayland, the cause is not yet known.
Work around these issues by not doing GPU-accelerated rendering in such
cases.
Index: qtwebengine-everywhere-src-5.10.0/src/core/web_engine_context.cpp
===================================================================
--- qtwebengine-everywhere-src-5.10.0.orig/src/core/web_engine_context.cpp
+++ qtwebengine-everywhere-src-5.10.0/src/core/web_engine_context.cpp
@@ -93,6 +93,7 @@
#include <QOffscreenSurface>
#ifndef QT_NO_OPENGL
# include <QOpenGLContext>
+# include <QOpenGLFunctions>
#endif
#include <QQuickWindow>
#include <QStringList>
@@ -167,6 +168,39 @@ void dummyGetPluginCallback(const std::v
}
#endif
+#ifndef QT_NO_OPENGL
+QString openGLVendor()
+{
+ QString vendor;
+
+ QOpenGLContext *oldContext = QOpenGLContext::currentContext();
+ QSurface *oldSurface = 0;
+ if (oldContext)
+ oldSurface = oldContext->surface();
+
+ QScopedPointer<QOffscreenSurface> surface( new QOffscreenSurface );
+ surface->create();
+ QOpenGLContext context;
+ if (!context.create()) {
+ qDebug() << "Error creating openGL context";
+ }
+ else if (!context.makeCurrent(surface.data())) {
+ qDebug() << "Error making openGL context current context";
+ } else {
+ const GLubyte *p;
+ QOpenGLFunctions *f = context.functions();
+ if ((p = f->glGetString(GL_VENDOR)))
+ vendor = QString::fromLatin1(reinterpret_cast<const char *>(p));
+ }
+
+ context.doneCurrent();
+ if (oldContext && oldSurface)
+ oldContext->makeCurrent(oldSurface);
+
+ return vendor;
+}
+#endif
+
} // namespace
namespace QtWebEngineCore {
@@ -379,6 +413,27 @@ WebEngineContext::WebEngineContext()
const char *glType = 0;
#ifndef QT_NO_OPENGL
+ bool disableGpu = qEnvironmentVariableIsSet("QT_WEBENGINE_DISABLE_GPU");
+
+ if (!qEnvironmentVariableIsSet("QT_WEBENGINE_DISABLE_WAYLAND_WORKAROUND") && platform.startsWith("wayland", Qt::CaseInsensitive))
+ {
+ qWarning() << "Running on wayland. Qt WebEngine will disable usage of the GPU.\n"
+ "Note: you can set the QT_WEBENGINE_DISABLE_WAYLAND_WORKAROUND\n"
+ "environment variable before running this application, but this is \n"
+ "not recommended since this usually causes applications to crash.";
+ disableGpu = true;
+ }
+
+ if (!qEnvironmentVariableIsSet("QT_WEBENGINE_DISABLE_NOUVEAU_WORKAROUND") && openGLVendor() == QStringLiteral("nouveau"))
+ {
+ qWarning() << "Nouveau openGL driver detected. Qt WebEngine will disable usage of the GPU.\n"
+ "Note: you can set the QT_WEBENGINE_DISABLE_NOUVEAU_WORKAROUND\n"
+ "environment variable before running this application, but this is \n"
+ "not recommended since this usually causes applications to crash as\n"
+ "Nouveau openGL drivers don't support multithreaded rendering";
+ disableGpu = true;
+ }
+
bool tryGL =
!usingANGLE()
&& (!usingSoftwareDynamicGL()
@@ -389,7 +444,7 @@ WebEngineContext::WebEngineContext()
|| enableWebGLSoftwareRendering
#endif
)
- && !usingQtQuick2DRenderer();
+ && !usingQtQuick2DRenderer() && !disableGpu;
if (tryGL) {
if (qt_gl_global_share_context() && qt_gl_global_share_context()->isValid()) {
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