[Bug 81438] New: no intel_backlight on macbook 2,1 with kernel 3.15

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81438

          Priority: medium
            Bug ID: 81438
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: no intel_backlight on macbook 2,1 with kernel 3.15
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jens.s.stein at gmail.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 102937
  --> https://bugs.freedesktop.org/attachment.cgi?id=102937&action=edit
Xorg.0.log

>From kernel 3.15, my macbook 2,1 (2007) doesn't have intel_backlight in
/sys/class/backlight/ anymore. In 3.14, everything works great.
The issue is similar to this one:
https://bugzilla.kernel.org/show_bug.cgi?id=77831. But the kernel which
reportedly fixes it for macbook 4,1 does not fix the issue for macbook 2,1.
apple_backlight which is provided by the apple_bl module is still present in
/sys/class/backlight/.

lspci -v:
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS,
943/940GML Express Integrated Graphics Controller (rev 03) (prog-if 00 [VGA
controller])
    Subsystem: Intel Corporation Device 7270
    Flags: bus master, fast devsel, latency 0, IRQ 16
    Memory at d0380000 (32-bit, non-prefetchable) [size=512K]
    I/O ports at 20e0 [size=8]
    Memory at c0000000 (32-bit, prefetchable) [size=256M]
    Memory at d0400000 (32-bit, non-prefetchable) [size=256K]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Kernel driver in use: i915
    Kernel modules: i915

00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML
Express Integrated Graphics Controller (rev 03)
    Subsystem: Intel Corporation Device 7270
    Flags: bus master, fast devsel, latency 0
    Memory at d0300000 (32-bit, non-prefetchable) [size=512K]
    Capabilities: [d0] Power Management version 2

Linux distribution: Fedora 20
Architechture: i686
Kernel: 3.15.5-200.fc20.i686+PAE
xf86-video-intel version: xorg-x11-drv-intel.i686 2.21.15-7.fc20 (am I correct
that this is Fedora's rename of xf86-video-intel)
libdrm version: 2.4.54-1.fc20

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