Screen brightness not working [Solved]

[bcostacurta]

Hello,
the keys works as the screen brightness is reacting, but the screen light itself do not change.
The windows manager is XFCE.

Hardware is laptop Acer Aspire 4750 / Core i3 / Intel HD Graphics 3000.
Sabayon is 8 CDX with XFCE.

Same stuff works fine under Xubuntu. For Xubuntu I setup ACPI=off in the grub config.
Unfortunately this does not work for Sabayon 8 CDX.

Bye,
Bruno

[Fitzcarraldo]

Try adding the following parameters to GRUB_CMDLINE_LINUX_DEFAULT in the file /etc/default/grub:

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GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=Linux acpi_backlight=acer"

and then generate a new /boot/grub/grub.cfg as follows:

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grub-mkconfig -o /boot/grub/grub.cfg

[bcostacurta]

Superbe ! It works !
Many thanks for your help.
Bruno

[koge]

How do I exactly edit that file /etc/default/grub? I'm kinda new to Sabayon so commands are not that familiar to me?

[Fitzcarraldo]

The same way you would do it in other distributions. Here are just four of the possibilities:

Option 1: Open a Konsole/Terminal window, log in a root user, then run the nano editor on the command line:

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$ su
Password:
# nano /etc/default/grub
# exit
exit
$

Option 2 for KDE users: Open a Konsole window then use kdesu to run the kwrite editor (you'll be prompted to enter the root user's password):

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$ kdesu kwrite /etc/default/grub
$

Option 3 for GNOME users: Open a Terminal window then use gksu to run the gedit editor (you'll be prompted to enter the root user's password):

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$ gksu gedit /etc/default/grub
$

Option 4 for Xfce users: Open a Terminal window then use sudo to run the leafpad editor (you'll be prompted to enter your password):

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$ sudo leafpad /etc/default/grub
$

[koge]

(gksu:12661): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
GConf Error: No D-BUS daemon running


(gksu:12661): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
GConf Error: No D-BUS daemon running


(gksu:12661): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
GConf Error: No D-BUS daemon running


(gedit:12662): EggSMClient-WARNING **: Failed to connect to the session manager: None of the authentication protocols specified are supported


** (gedit:12662): WARNING **: Could not connect to session bus

this is the outcome and I'm using gnome/cinnamon

[Fitzcarraldo]

Then use nano as per my previous post.