Brightness Keys

[TheDead]

Just adding my two cents, I had laptops that had a "lock/disable" brightness function in the BIOS configuration, some even had a physical Brightness lock "switch" (rare).

Other laptops had brightness control disabled while power adapter was unplugged (or plugged can't remember).

Or, worst case is that it's a Windows "software" only function that "faked" the brightness output just darkening the display and not lowering the power to the backlight of the screen. I guess this would only applies to really low-quality laptops and not Asus...(?).

-TheDead (TheUxNo0b)

[TheDead]

Well, I guess my suggestions were maybe irrelevant, found this :
https://itsfoss.com/fix-brightness-ubuntu-1310/

(If the F50 has an Intel graphics card).

Cheers!

[torreydale]

[member=6733]TheDead[/member] ,


I'm following this thread.  I came across something similar with a Toshiba Satellite laptop (a L755, I think).  Worked fine with LL 2.8 64bit.  Moved it to LL3.6 64-bit; was fine until a couple of reboots later.  The screen was very dim.  No response to brightness keys.  I have a workaround now where instead of fully dim, it is fully bright.  I'm looking for a permanent fix.  I will try what you've linked to, and if successful, I will report back.  It looks like a good link with a concise combination of the approaches I've seen in multiple links. 


Fingers crossed.

[torreydale]

I was about to do these things, but the machine got better on its own as mysteriously as the problem appeared.

[TheDead]

Lol, maybe it's a defective backlight.
Don't forget to say a big thanks [member=458]m654321[/member]  though

Cheers!