[Bug 75791] i915: backlight turns off during boot

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=75791

mcy at lm7.fr changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #135551|0                           |1
        is obsolete|                            |

--- Comment #7 from mcy at lm7.fr ---
Created attachment 135901
  --> https://bugzilla.kernel.org/attachment.cgi?id=135901&action=edit
Full kern.log (3.14.3)

Same thing with 3.14.3, kern.log and:

$ lsmod | grep i915
i915                  713670  2
drm_kms_helper         39892  1 i915
drm                   232465  3 i915,drm_kms_helper
video                  17804  1 i915
i2c_algo_bit           12751  1 i915
i2c_core               24228  6
drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
button                 12944  1 i915
$ ls /sys/class/backlight
intel_backlight
$ find /lib/modules/$(uname -r) -name i915.ko
/lib/modules/3.14.3/kernel/drivers/gpu/drm/i915/i915.ko
$ grep I915 /boot/config-3.14.3
CONFIG_DRM_I915=m
CONFIG_DRM_I915_KMS=y
CONFIG_DRM_I915_FBDEV=y
# CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT is not set
# CONFIG_DRM_I915_UMS is not set
CONFIG_SND_HDA_I915=y

If you still think there is something wrong with my install, please give me a
hint (I just did the usual make && make modules_install && make install for
both kernels).

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