Comment 0 for bug 831542

Oneiric kernel 3.0.0-9.12 yields the following warning and stack trace since the application of the backported intel backlight patch (commit d1969fb "Not all systems expose a firmware or platform mechanism for changing the backlight intensity on i915, so add native driver support"):

[ 4.426067] ------------[ cut here ]------------
[ 4.426078] WARNING: at /build/buildd/linux-3.0.0/fs/sysfs/dir.c:455 sysfs_ad
d_one+0xc0/0xf0()
[ 4.426080] Hardware name: Studio 1558
[ 4.426082] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight'