On Mon, 26 Feb 2007, Richard Purdie wrote:
> > When I hit the keyboard, the brightness stays low (it's 50% of light
> > or so, so I could read what's on the screen, but it's uncomfortably
> > dim), and I have to manually raise the brightness on the LCD. Quite
> > annoying :) I have bisected this to your commit
> > 994efacdf9a087b52f71e620b58dfa526b0cf928
> Which framebuffer driver and backlight driver are you using?
> ("ls /sys/class/backlight/" will show which backlight it is)
It's IBM:
$ ll /sys/class/backlight/
drwxr-xr-x 2 root root 0 Feb 26 13:28 ibm
At the time the brightness goes low, there is '0' in
/sys/class/backlight/ibm/actual_brightness and
/sys/class/backlight/ibm/brightness
Echoing '7' into /sys/class/backlight/ibm/brightness gets the brightness
back again to normal.
> Is the machine in active use when it dims or at idle and does the screen
> blank at the same time it dims? If so, does the keypress unblank the
> screen (but not change the brightness)?
It doesn't blank at the time it dims - it just decreases brightness. I
will do some more tests, but it seemed on a first sight that it happens
only when the machine is idle.
> Also, is this on a console or under something like X?
I observed it only on console, but didn't experiment with it too much yet.
--
Jiri Kosina
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