How to make radeon graphic switching settings permanent

eyolf · 2011-12-23 01:52:59

The wiki for the Acer TimelineX gives the following lines of code for a power-saving configuration:

#mount -t debugfs none /sys/kernel/debug
#modprobe radeon
#echo ON > /sys/kernel/debug/vgaswitcheroo/switch
#echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

This works perfectly for my purposes -- to reduce fan noise -- but how do I make these settings permanent? Is there any downside (performance-wise) to adding the debugfs to /etc/fstab? The radeon module is already loaded, so what remains to know is what to do about the echo ON / echo OFF lines. Should I put them in a startup file, or is there another way to set them by default?

Last edited by eyolf (2011-12-23 08:41:44)

jasonwryan · 2011-12-23 02:07:18

Please edit your thread title: "How to" is less than helpful...

https://wiki.archlinux.org/index.php/Fo … ow_to_Post

eyolf · 2011-12-23 08:42:52

Very sorry. There was a longer title, but it got lost somehow in the editing process.

tomk · 2011-12-23 09:27:17

Use /etc/rc.local.

karol · 2011-12-23 21:02:45

eyolf wrote:

Is there any downside (performance-wise) to adding the debugfs to /etc/fstab?

Have you measured it somehow?

Last edited by karol (2011-12-23 21:04:53)

eyolf · 2011-12-23 21:48:07

No, I haven't measured it. I was just wondering about the necessity of having a debug file system mounted and running just in order to stop some activity. Seems rather roundabout to me. That's also why I wondered if there is some other way to do this: as a permanent setting rather than as a command to be run at boot/login time.

karol · 2011-12-23 21:49:42

My idea would be to use fstab, but I honestly don't know if there's any difference.

Arch Linux

#1 2011-12-23 01:52:59

How to make radeon graphic switching settings permanent

#2 2011-12-23 02:07:18

Re: How to make radeon graphic switching settings permanent

#3 2011-12-23 08:42:52

Re: How to make radeon graphic switching settings permanent

#4 2011-12-23 09:27:17

Re: How to make radeon graphic switching settings permanent

#5 2011-12-23 21:02:45

Re: How to make radeon graphic switching settings permanent

#6 2011-12-23 21:48:07

Re: How to make radeon graphic switching settings permanent

#7 2011-12-23 21:49:42

Re: How to make radeon graphic switching settings permanent

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