I have updated my Ubuntu Maverick and Natty kernel PPA's with another
new experimental patch by Keith Packard[0]. This new patch may resolve
the "inverted brightness" and/or the "jumps with successive changes"
behavior that has been reported on some systems:
https://launchpad.net/~kamalmostafa/+archive/linux-kamal-
mjgbacklight
The kernels containing the new patch are tagged "~kamal4~..." (use
'uname -a' to check); they will become available within the next day. If
you experience any change in your brightness control behavior after
updating to this new version, please post a note here.
For Ubuntu Oneiric (11.10), I am maintaining a separate backlight PPA
which also now includes this new patch. Oneiric users should see the
bug #872652 for that.
[0] http://lists.freedesktop.org/archives/intel-
gfx/2011-November/013519.html
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https://bugs.launchpad.net/bugs/568611
Title:
Screen brightness control fails on Dell Studio 1558
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