[Bug 278477] x11-servers/xorg-server regression (?) - hardware brightness adjustment blocked in X (T400)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278477

[email protected] changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #2 from [email protected] ---
Sorry, but I can only guess at the meaning of "Fn + key  do not five separate
xev outputs so they are intercepted (?), similarly to LED light combination"

Also, does backlight(1) work on the system? It should work with any interface
that works with i915kms. That will not solve your problem, but says that
brightness does work.

On m T16, I use the following in /etc/devd/thinkpad.conf to get brightness +-
to work, but I am not sure that the values 0x10 and 0x11 are universal on
ThinkPads. acpi_ibm.ko must be loaded.

notify 100 {
         match "system"                  "ACPI";
         match "subsystem"               "IBM";
         match "notify"                  "0x10";
         action "/usr/bin/backlight +";
};

notify 100 {
         match "system"                  "ACPI";
         match "subsystem"               "IBM";
         match "notify"                  "0x11";
         action "/usr/bin/backlight -";
};

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