[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 #135581|0                           |1
        is obsolete|                            |

--- Comment #6 from mcy at lm7.fr ---
Created attachment 135891
  --> https://bugzilla.kernel.org/attachment.cgi?id=135891&action=edit
Full kern.log (drm-intel-nightly)

Sorry but I don't see what can be wrong with my installation. The i915 and drm
modules are installed and even loaded at boot time, although indeed there is no
mention of them in the first 10 seconds of the log. The following is with
drm-intel-nightly (same version as the other day, i.e. commit
dd28119c31cf06fc4c3bb548699018a91e45a676). I'm also attaching the full kern.log
(not just the first 10 seconds) with loglevel=8 and drm.debug=0xe; i915 and drm
appear, but I think it is just once X is started, not before.

$ lsmod | grep i915
i915                  772969  2 
drm_kms_helper         44730  1 i915
drm                   233070  4 i915,drm_kms_helper
video                  17804  1 i915
i2c_algo_bit           12751  1 i915
i2c_core               41916  6
drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,videodev
button                 12944  1 i915
$ ls /sys/class/backlight
$ find /lib/modules/$(uname -r) -name i915.ko
/lib/modules/3.15.0-rc3+/kernel/drivers/gpu/drm/i915/i915.ko
$ grep I915 /boot/config-3.15.0-rc3+
CONFIG_DRM_I915=m
CONFIG_DRM_I915_KMS=y
CONFIG_DRM_I915_FBDEV=y
# CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT is not set
CONFIG_SND_HDA_I915=y

-- 
You are receiving this mail because:
You are on the CC list for the bug.