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<H1>[Mageia-discuss] battery power control and hard disk spin down with mageia 2 (systemd)?</H1>
<B>Luca Olivetti</B>
<A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20battery%20power%20control%20and%20hard%20disk%20spin%20down%0A%20with%20mageia%202%20%28systemd%29%3F&In-Reply-To=%3C510C6363.1010807%40ventoso.org%3E"
TITLE="[Mageia-discuss] battery power control and hard disk spin down with mageia 2 (systemd)?">luca at ventoso.org
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<I>Sat Feb 2 01:52:51 CET 2013</I>
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<PRE>Al 02/02/13 01:32, En/na Luca Olivetti ha escrit:
><i> Al 31/01/13 11:07, En/na Luca Olivetti ha escrit:
</I>><i>
</I>>><i>
</I>>><i> Another problem I have is the backlight control doesn't work, but I
</I>>><i> think that's a kernel problem.
</I>><i>
</I>><i> It turns out the kernel has no problem controlling the backlight, but as
</I>><i> soon as the nvidia driver takes control it no longer work.
</I>><i> With nouveau it works though it stops working after a suspend (the
</I>><i> brightess is at its maximum after a resume and cannot be changed).
</I>><i> Also, the hotkeys stops working after a while, but the backlight can
</I>><i> still be controlled via the battery applet or the
</I>><i> /sys/class/backlight/acpi_video0/brightness file (and, BTW, as I said
</I>><i> before after a suspend it doesn't work, but the hotkeys are working
</I>><i> again, i.e., they're changing the value in the file but it has no effect
</I>><i> on the backlight).
</I>
And now I found a solution for the nvidia proprietary driver, which
survives a suspend/resume.
It's just a matter of adding
Option "RegistryDwords" "EnableBrightnessControl=1"
to the Device section of xorg.conf
(BTW, why does XFdrake disable DynamicTwinTwied ?)
><i>
</I>><i> Still looking for a way to avoid for the disk to spin down when on battery.
</I>><i>
</I>><i> Bye
</I>
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