sony vaio laptop : brightness didn't work after upgrade to gutsy

[Mathieu Laurent]

Binary package hint: linux-image

Before upgrade, I use sony_acpi and brigthness works.

After upgrade the brightness doesn't work.

[Mathieu Laurent (mla)]

Solution :

The kernel module sony_acpi is now called sony_laptop

1. list sony module

lsmod | grep sony -->

sony_laptop 32088 0
sonypi 23960 0
sony_acpi ...

2. remove all sony modules :

modprobe -r sony_acpi
modprobe -r sonypi
modprobe -r sony_laptop

3. launch sony_laptop :

modprobe sony_laptop

4. Don't load sony_acpi at start :

remove from /etc/modules : sony_acpi

Results :

The applet of gnome-power-manager to manage brightness works perfectly

Add applet to panel ;-)

[Mathieu Laurent (mla)]

sony_acpi is now in kernel > 2.6.21. And it works !!!

[huiii (a00ps)]

running sony vaio fz 31 m.
sony_acpi does not work for changing brightness.
it leaves /proc/acpi/sony/ empty after modprobing...
nothing at all works to change brightness behalf a decent sunglass.

[huiii (a00ps)]

edit: ubuntu hardy, nvidia 8400 gs