Laptop screen stuck on very low brightness

Richard Vickery richard.vickeryrv at
Fri Jun 8 19:55:02 UTC 2012

I used to get stuck on this one and end up going to "system settings" and
"brightness". This is the first I have heard of the Fn combination;

On Thu, Jun 7, 2012 at 4:49 PM, Björn Persson <bjorn at>wrote:

> Corey Richardson wrote:
> > How are you trying to modify the brightness?
> Holding down Fn and pressing the up and down keys is supposed to adjust the
> brightness. A little box is shown in the middle of the screen with a
> horizontal bar that indicates the brightness. That part still works. The
> bar
> grows and shrinks, but the brightness is not affected.
> > Does `xbacklight` work?
> All xbacklight commands I try (except for "xbacklight -help") cause the
> screen
> to flash once and return zero. Even "xbacklight -get" causes a flash,
> prints
> nothing, and returns zero.
> Björn Persson
> --
> devel mailing list
> devel at
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