Patch "drm/i915/fbc: Disable on HSW by default for now" has been added to the 4.6-stable tree
Subsystems (3)
This is a note to let you know that I've just added the patch titled
drm/i915/fbc: Disable on HSW by default for now
to the 4.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-fbc-disable-on-hsw-by-default-for-now.patch
and it can be found in the queue-4.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.
Quoted 1 line
From
1e3fa0acfec677e915d7de5ac6e1f18cfa4f805bMon Sep 17 00:00:00 2001
From: Lyude <[email protected]>
Date: Thu, 9 Jun 2016 11:58:15 -0400
Subject: drm/i915/fbc: Disable on HSW by default for now
From: Lyude <[email protected]>
commit 1e3fa0acfec677e915d7de5ac6e1f18cfa4f805b upstream.
Quoted 1 line
Quoted 1 line
This was kind of a difficult bug to track down. If you're using a Haswell system running GNOME and you have fbc completely enabled and working, playing videos can result in video artifacts. Steps to reproduce:
- Run GNOME
- Ensure FBC is enabled and active
- Download a movie, I used the ogg version of Big Buck Bunny for this
- Run gst-launch-1.0 filesrc location='some_movie.ogg' ! decodebin ! glimagesink in a terminal
- Watch for about over a minute, you'll see small horizontal lines go down the screen.
For the time being, disable FBC for Haswell by default.
Stefan Richter reported kernel freezes (no video artifacts) when fbc is on. (E3-1245 v3 with HD P4600; openbox and some KDE and LXDE applications, thread begins at https://lkml.org/lkml/2016/4/26/813).
We also got reports from Steven Honeyman on openbox+roxterm.
v2 (From Paulo):
- Add extra information to the commit message
- Add Fixes tag
- Rebase
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96461
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96464
--- drivers/gpu/drm/i915/intel_fbc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
drivers/gpu/drm/i915/intel_fbc.c +1 -2
@@ -823,8 +823,7 @@ static bool intel_fbc_can_choose(struct {struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;struct intel_fbc *fbc = &dev_priv->fbc; -bool enable_by_default =IS_HASWELL (dev_priv) || -IS_BROADWELL (dev_priv); +bool enable_by_default =IS_BROADWELL (dev_priv);if (intel_vgpu_active (dev_priv->dev)) { fbc->no_fbc_reason ="VGPU is active" ;
Patches currently in stable-queue which might be from [email protected] are
queue-4.6/drm-dp-mst-always-clear-proposed-vcpi-table-for-port.patch queue-4.6/drm-i915-fbc-disable-on-hsw-by-default-for-now.patch queue-4.6/drm-i915-ilk-don-t-disable-ssc-source-if-it-s-in-use.patch