Fedora 14 : Display is dim and gloomy

[santosh]

My laptop is lenovo W510.

Its a dual boot ( Fedora 14 and Window 7)

In Fedora 14 I am not getting required brightness in my laptop screen with
Battery power ON (With AC power I am getting required brightness) .
(in window 7 there is no such issue)

Fn + brightness is not giving any help.


[santosh at localhost ~]$ rpm -qa | grep nouveau
xorg-x11-drv-nouveau-0.0.16-11.20100826git065576d.fc14.i686

I suspect the issue is with "xorg-x11-drv-nouveau".
Because when I switched from nouveau to nvidia
(installed xorg-x11-drv-nvidia-260.19.12-3.fc14.i686)
then brightness issue got resolved but it created some other problem
like suspend / resume did not work, Fn + F7 did not work, etc...

So I moved back to nouveau again.

With AC power ON it gives proper brightness.
The moment I remove the power cable it becomes dim and gloomy and never comes
to proper state even if the power cable is inserted back.

The only solution is to reboot the machine (with AC power ON)


regards
Santosh