i915: 3.1.0-rc3+: WARNING: at fs/sysfs/dir.c:455 sysfs_add_one+0xb8/0xf0()

Lucas De Marchi lucas.de.marchi at gmail.com
Sat Aug 27 06:04:43 PDT 2011

Hi Sergei,

On Fri, Aug 26, 2011 at 17:30, Sergei Trofimovich <slyich at gmail.com> wrote:
> Around -rc2+ i've noticed the following warning in dmesg [1]
>> WARNING: at fs/sysfs/dir.c:455 sysfs_add_one+0xb8/0xf0()
>> sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight'
> It tries to register backlight twice, so fails miserably.
> The machine is compaq-2510p with 965GM.
> Reverting commit aaa6fd2a004147bf32fce05720938236de3361d9 helps.
> ("Not all systems expose a firmware or platform mechanism for changing
> the backlight intensity on i915,  so add native driver support.")
> Attached dmesg before reverting the patch and after.

There's another patch that fixes this issue:


Lucas De Marchi

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