mess with i915drm after update to latest releng-10

[Wojciech Puchar]

While system is running stable i'm constantly getting kernel errors 
like below every minute or more often.


error: [drm:pid632:gen6_sanitize_pm] *ERROR* Power management discrepancy: 
GEN6_RP_INTERRUPT_LIMITS expected 14070000, was 14000000
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid7:i915_gem_object_unbind] *ERROR* Attempting to unbind 
pinned buffer
error: [drm:pid632:gen6_sanitize_pm] *ERROR* Power management discrepancy: 
GEN6_RP_INTERRUPT_LIMITS expected 14070000, was 14000000
error: [drm:pid632:gen6_sanitize_pm] *ERROR* Power management discrepancy: 
GEN6_RP_INTERRUPT_LIMITS expected 14070000, was 14000000


any ideas how to fix it?

# kldstat
Id Refs Address            Size     Name
  1   23 0xffffffff80200000 bef5f0   kernel
  2    1 0xffffffff80df0000 6cf30    vboxdrv.ko
  3    2 0xffffffff80e5d000 7b460    drm2.ko
  4    1 0xffffffff80ed9000 c5178    i915kms.ko
  5    1 0xffffffff81011000 42d2     geom_label.ko