uncontrollable brightness with PC-BSD 11.0-CURRENT

[Graham Perrin]

On 16/12/2015 14:58, Michael Gmelin wrote:

> Maybe graphics/intel-backlight will work for you?
> (pkg install intel-backlight)

Thanks. That's now installed, but ineffective (no visible change with,
for example, a fifty percent reduction).

On 16/12/2015 20:30, Anthony Jenkins wrote:

> … Try loading acpi_video(4) and seeing if the brightness keys work.  I can help you with ACPI bit.

I read the manual page, but I don't understand PC-BSD well enough to
know how to perform the load.

Experimentally, I edited some files and restarted the OS but there was
no improvement. The acpi_video discussions on which I based those
experiments were old; I may be on the wrong learning curve.

Is it relevant to state that VESA is in use?