From 0368920e51ae0cded0eb518c340a4dd17764d461 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 6 Jun 2014 10:37:11 +0100 Subject: [PATCH] drm/i915: Disable FBC by default also on Haswell and later It causes black screen on bootup and is approximately 100x slower than running with FBC disabled, so the GPU runs at a high frequency for much longer - completely contrary to the power saving claims. It also still has mutex deadlocks in multi-head scenarios, which can lead to a system/X lockup. These bugs were known before FBC was enabled by default on Haswell and still have not been fixed. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79716 Reported-and-tested-by: Jon Kristensen Signed-off-by: Chris Wilson Reviewed-by: Daniel Vetter Cc: stable@vger.kernel.org [Jani: update subject to reflect the actual change] Signed-off-by: Jani Nikula --- Reading git-format-patch failed