On Fri, Jun 06, 2014 at 10:37:11AM +0100, Chris Wilson wrote: > 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 <info@xxxxxxxxxx> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> Jani, please pick up for -fixes. -Daniel > --- > drivers/gpu/drm/i915/intel_pm.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index e403010540a5..0b8a6010427e 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -511,8 +511,7 @@ void intel_update_fbc(struct drm_device *dev) > obj = intel_fb->obj; > adjusted_mode = &intel_crtc->config.adjusted_mode; > > - if (i915.enable_fbc < 0 && > - INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) { > + if (i915.enable_fbc < 0) { > if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT)) > DRM_DEBUG_KMS("disabled per chip default\n"); > goto out_disable; > -- > 2.0.0 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
