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+ <TITLE> [Mageia-discuss] battery power control and hard disk spin down with mageia 2 (systemd)?
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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
+ </A><BR>
+ <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:
+&gt;<i> Al 31/01/13 11:07, En/na Luca Olivetti ha escrit:
+</I>&gt;<i>
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> Another problem I have is the backlight control doesn't work, but I
+</I>&gt;&gt;<i> think that's a kernel problem.
+</I>&gt;<i>
+</I>&gt;<i> It turns out the kernel has no problem controlling the backlight, but as
+</I>&gt;<i> soon as the nvidia driver takes control it no longer work.
+</I>&gt;<i> With nouveau it works though it stops working after a suspend (the
+</I>&gt;<i> brightess is at its maximum after a resume and cannot be changed).
+</I>&gt;<i> Also, the hotkeys stops working after a while, but the backlight can
+</I>&gt;<i> still be controlled via the battery applet or the
+</I>&gt;<i> /sys/class/backlight/acpi_video0/brightness file (and, BTW, as I said
+</I>&gt;<i> before after a suspend it doesn't work, but the hotkeys are working
+</I>&gt;<i> again, i.e., they're changing the value in the file but it has no effect
+</I>&gt;<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 &quot;RegistryDwords&quot; &quot;EnableBrightnessControl=1&quot;
+
+to the Device section of xorg.conf
+(BTW, why does XFdrake disable DynamicTwinTwied ?)
+
+
+
+&gt;<i>
+</I>&gt;<i> Still looking for a way to avoid for the disk to spin down when on battery.
+</I>&gt;<i>
+</I>&gt;<i> Bye
+</I>
+</PRE>
+
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