Linux 3.19-rc1: i915.ko error messages at boot

[Pali Rohár]

lspci output:
00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics 
Controller [8086:0416] (rev 06)

dmesg output:
[    2.379847] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.
[    2.379847] [drm:intel_uncore_check_errors [i915]] *ERROR* Unclaimed register before interrupt
[    2.379868] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.
[    2.379869] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.
[    2.430637] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.<3>[    2.430649] [drm:intel_uncore_check_errors [i915]] *ERROR* 
Unclaimed register before interrupt
[    2.430756] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.
[    2.430817] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.[drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register 
detected. Please use the i915.mmio_debug=1 to debug this problem.
[    2.430948] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.[drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register 
detected. Please use the i915.mmio_debug=1 to debug this problem.
[    2.619114] [drm:intel_uncore_check_errors [i915]] *ERROR* Unclaimed register before interrupt
[    2.619213] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.
[    2.619275] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.[drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register 
detected. Please use the i915.mmio_debug=1 to debug this problem.
[    2.626522] [drm:intel_uncore_check_errors [i915]] *ERROR* Unclaimed register before interrupt
[    2.626616] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.
[    2.626678] [drm:hsw_unclaimed_reg_detect.isra.6 [i915]] *ERROR* Unclaimed register detected. Please use the 
i915.mmio_debug=1 to debug this problem.<6>[    2.633412] AVX2 version of gcm_enc/dec engaged.

-- 
Pali Rohár
pali.rohar at gmail.com
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