Satellite P855: cannot change the brightness of the screen under Linux

Hello, guys... and girls :)...

I bought my PC Toshiba laptop fourth - P855, there windows 7 pre-installed, but I'm a fan of Linux, so I installed Kubuntu 12.04 on it and have the dual boot menu at startup...

And I have a very annoying problem - I can not change the brightness of the screen somehow, so keep it up... for the brightness function keys do not work, and the slider for brightness change anything...
It works on windows, so I guess that's not the hardware problem...

So, can you help me? ... I tried many things, tried different distributions also, but on none of them, I am able to change the brightness. And also - I tried the same distribution on the different laptops, and it works great, even from Live CD, no installation...

I was able to change the brightness on previous phones I had... so why is this one so well done for Windows? ...

> It works on windows, so I guess that's not the hardware problem.

It's okay is not hardware problem, it looks like a bug in the Linux kernel or driver problem.

Given that Linux is not officially supported on Toshiba laptops, I would recommend checking the support forum for the Linux distribution you use check also system Linux bugs for a possible solution on some linux support pages.

Tags: Toshiba

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