OK, I've got an X230 where this works for me on 4.4 and 4.8, so if it's
being handled by the ACPI driver then we may have some weird ACPI issue
going on. Can you dump the acpi tables so I can sanity check these to
see what is different from your X230 and mine?
Please install acpica-tools and run:
sudo acpidump > acpidump-x230.log
and attach that to the bug report
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1626429
Title:
[4.8 regression][ThinkPad X230] brightness change keys do not work any
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