I think this is either a dupe of bug #819002 or should be fixed in a
similar manner. (I.e., the patch on that bug might not fix this
particular model, but it might simply require adding this model number.)
The fix improves the ACPI support for Vaios in the linux kernel.
In particular, since you indicate the problem also exists with -nouveau,
that seems to narrow it to the kernel as well.
Reassigning to the kernel. Possibly this should be duped to #819002,
but I'm not certain.
** Package changed: nvidia-graphics-drivers (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Confirmed => New
** Tags added: kernel-handoff-graphics precise
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https://bugs.launchpad.net/bugs/551668
Title:
Fn+F5 and Fn+F6 don't modify brightness on Sony VAIO VPCCW (GT 230M)
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