Bug 1831598: Add AMD 600 family to the Linux WebRender blocklist. r=gfx-reviewers,aosmond

Differential Revision: https://phabricator.services.mozilla.com/D186785

widget/gtk/GfxInfo.cpp

@@ -1144,6 +1144,12 @@ const nsTArray<GfxDriverInfo>& GfxInfo::GetGfxDriverInfo() {
         nsIGfxInfo::FEATURE_THREADSAFE_GL, nsIGfxInfo::FEATURE_BLOCKED_DEVICE,
         DRIVER_COMPARISON_IGNORED, V(0, 0, 0, 0), "FEATURE_FAILURE_BUG_1788573",
         "");
+
+    // AMD R600 family does not perform well with WebRender.
+    APPEND_TO_DRIVER_BLOCKLIST(
+        OperatingSystem::Linux, DeviceFamily::AmdR600,
+        nsIGfxInfo::FEATURE_WEBRENDER, nsIGfxInfo::FEATURE_BLOCKED_DEVICE,
+        DRIVER_COMPARISON_IGNORED, V(0, 0, 0, 0), "AMD_R600_FAMILY", "");
   }
   return *sDriverInfo;
 }