LCD Brightness Control not working on Lenovo X121e (ACPI issue?)

Matthias Petermann matthias at
Sun Aug 18 20:30:31 UTC 2013

Hi Zoran,

yes, I just checked this. At the time the big "ThinkPad" logo is shown 
at cold start, I am able to use Fn+F8/F9 to tune brightness.

As mentioned in current@, there is a workaround for the X121e to do this 
at runtime, by using sysutils/acpi_call, e.g.

# acpi_call -p '\VBRU'            (brightness up one step)
# acpi_call -p '\VBRD'            (brightness down one stop)

Kind regards,

Am 18.08.2013 17:33, schrieb Zoran Kolic:
> Out of curiosity, does it work from bios?
> That was the only way to correct brightness on my e320.
> Best regards
>                               Zoran
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