RC6 fails again.
I found my system freeze mostly during starting up X and KDE. Sometimes it works for some minutes, sometimes it freezes immediatly. When the freeze happens, everything is dead (even the reset button does not work, I need to power cycle).
I disabled RC6, and my system runs wonderfully.
The system is a Z68 Pro board with Sandybridge i5-2500K processor, 8 GB of RAM and UEFI firmware.
Reported-by: Kai Krakow hurikhan77@gmail.com Signed-off-by: Keith Packard keithp@keithp.com --- drivers/gpu/drm/i915/intel_display.c | 8 +++----- 1 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 8a61b81..4b7a0f2 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7922,13 +7922,11 @@ static bool intel_enable_rc6(struct drm_device *dev) return 0;
/* - * Enable rc6 on Sandybridge if DMA remapping is disabled + * Disable rc6 on Sandybridge */ if (INTEL_INFO(dev)->gen == 6) { - DRM_DEBUG_DRIVER("Sandybridge: intel_iommu_enabled %s -- RC6 %sabled\n", - intel_iommu_enabled ? "true" : "false", - !intel_iommu_enabled ? "en" : "dis"); - return !intel_iommu_enabled; + DRM_DEBUG_DRIVER("Sandybridge: RC6 disabled\n"); + return 0; } DRM_DEBUG_DRIVER("RC6 enabled\n"); return 1;