From: Chris Wilson Date: Fri, 6 Jun 2014 09:37:11 +0000 (+0100) Subject: drm/i915: Disable FBC by default also on Haswell and later X-Git-Tag: omap-for-v3.16/fixes-rc4~80^2^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0368920e51ae0cded0eb518c340a4dd17764d461;p=pandora-kernel.git 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-diff-tree failed