Announcement

**SteveRiley** · Feb 04, 2013, 03:20 PM

Does VGA switcheroo actually disable the hardware so it won't draw power? I dunno.

An alternative would be to blacklist all the Intel graphics stuff -- the Intel CPU is smart enough to power down the built-in GPU when it isn't being used. This would allow both the kernel and X to find and use the AMD graphics. And, of course, bring you into the special hell that is AMD graphics on Linux!

**dmeyer** · Feb 04, 2013, 03:38 PM

Originally posted by SteveRiley View Post

Does VGA switcheroo actually disable the hardware so it won't draw power? I dunno

I was just throwing an idea out. I think it lets you but I'm not sure. Hopefully a guru of graphics can come along to help.

**Fintan** · Sep 17, 2013, 02:01 AM

Upgrading to KDE 4.11.1 has shut my fan up to a very large extent. Kwin issue?

**oshunluvr** · Sep 17, 2013, 07:45 AM

Originally posted by SteveRiley View Post

Does VGA switcheroo actually disable the hardware so it won't draw power? I dunno.

Yes.

http://www.kubuntuforums.net/showthr...-only-have-one

**Feathers McGraw** · Sep 23, 2013, 02:38 AM

Originally posted by oshunluvr View Post

Yes.

http://www.kubuntuforums.net/showthr...-only-have-one

ha, was just about to link that!

**Fintan** · Sep 28, 2013, 03:24 AM

Hmm.. tried that on saucy (todays upgrade) and it worked fine.

Tried it on 13.04 and this is the result:

fintan@fintanws1:~$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
[sudo] password for fintan:
cat: /sys/kernel/debug/vgaswitcheroo/switch: No such file or directory
fintan@fintanws1:~$

Kernel:

fintan@fintanws1:~$ uname -a
Linux fintanws1 3.11.0-031100-generic #201309021735 SMP Mon Sep 2 21:36:21 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
fintan@fintanws1:~$

what am I missing?

**Simon** · Sep 28, 2013, 10:35 AM

This started as a noise in your fan, but the number one cause is dust. The high temps would be a result of heatsinks covered in dust. Ever since post #2 dmeyer redirected a noise issue to a GPU issue, so back to the noise. Get a can of compressed air and clean the fan. If that doesn't work you might need to replace the fan if the bearings are shot. No amount of fiddling with GPU settings will clean dust out of your laptop.

**Snowhog** · Sep 28, 2013, 10:59 AM

Originally posted by Simon View Post

No amount of fiddling with GPU settings will clean dust out of your laptop.

So true.

Code:

rm dust
rm: cannot remove ‘dust’: No such file or directory

**Feathers McGraw** · Sep 28, 2013, 11:07 AM

Originally posted by Snowhog View Post

Code:

rm dust
rm: cannot remove ‘dust’: No such file or directory

That was JUST TERRIBLE.

Still laughing

**Buddlespit** · Sep 28, 2013, 03:23 PM

Originally posted by Snowhog View Post

So true.

Code:

rm dust
rm: cannot remove ‘dust’: No such file or directory

**Fintan** · Sep 29, 2013, 04:22 AM

LOl.
I "clean" my fan with pressured air and a vacuum every 2 weeks.
Thanks simon, and I am glad to have given you guys a good laugh

BUT, I was wondering why

Code:

sudo cat /sys/kernel/debug/vgaswitcheroo/switch

works on 13.10 beta and not on 13-04

**Feathers McGraw** · Sep 29, 2013, 11:09 AM

Out of interest, what's the closest directory you have to that file? Does the vgaswitcheroo directory exist? If so, what's in it?

Feathers

**Fintan** · Sep 30, 2013, 12:30 AM

Ok. When I run this under Kubuntu 13.04 I get this:

fintan@fintanws1:~$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
[sudo] password for fintan:
cat: /sys/kernel/debug/vgaswitcheroo/switch: No such file or directory
fintan@fintanws1:~$

So, no there is no vgaswitcheroo folder or switch file.
What do you mean by "closest"?

When I run it under 13.10 Beta2 I get this:

fintan3@fintanws4:~$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
[sudo] password for fintan3:
0:IGD:+:Pwr:0000:00:02.0
1

IS: :Pwr:0000:01:00.0
fintan3@fintanws4:~$

and this is in the switch file:

0:IGD:+:Pwr:0000:00:02.0
1

IS: :Pwr:0000:01:00.0

As you can also see from the command above.

**Feathers McGraw** · Sep 30, 2013, 06:13 AM

When BASH says no folder or directory, it means there is no file or folder called "switch", not that the directory /sys/kernel/debug/vgaswitcheroo doesn't exist.

When I say closest folder I mean I am curious about whether the vgaswitcheroo directory exists?

Just wondering whether it might be a case of creating a file called "switch", or whether the vgaswitcheroo folder is gone completely and has been replaced by something different.

Code:

feathers-mcgraw@62-West-Wallaby-Street:~$ sudo su                                             
root@62-West-Wallaby-Street:/home/feathers-mcgraw# cd /sys/kernel/debug/
root@62-West-Wallaby-Street:/sys/kernel/debug# ls -l
total 0
drwxr-xr-x  2 root root 0 Sep 30  2013 acpi
drwxr-xr-x 29 root root 0 Sep 30  2013 bdi
drwxr-xr-x  3 root root 0 Sep 30  2013 binder
drwxr-xr-x  3 root root 0 Sep 30 12:59 bluetooth
drwxr-xr-x  3 root root 0 Sep 30 12:59 brcmsmac
drwxr-xr-x  2 root root 0 Sep 30  2013 cleancache
drwxr-xr-x  6 root root 0 Sep 30  2013 dri
drwxr-xr-x  2 root root 0 Sep 30  2013 extfrag
drwxr-xr-x  2 root root 0 Sep 30  2013 frontswap
-r--r--r--  1 root root 0 Sep 30  2013 gpio
drwxr-xr-x  3 root root 0 Sep 30 12:59 ieee80211
drwxr-xr-x  2 root root 0 Sep 30  2013 kprobes
drwxr-xr-x  2 root root 0 Sep 30  2013 mce
-r--r--r--  1 root root 0 Sep 30  2013 pwm
drwxr-xr-x  2 root root 0 Sep 30  2013 regmap
drwxr-xr-x  3 root root 0 Sep 30  2013 regulator
-rw-r--r--  1 root root 0 Sep 30  2013 sched_features
-r--r--r--  1 root root 0 Sep 30  2013 suspend_stats
drwxr-xr-x  6 root root 0 Sep 30  2013 tracing
drwxr-xr-x  2 root root 0 Sep 30  2013 usb
drwxr-xr-x  2 root root 0 Sep 30  2013 vgaswitcheroo
-r--r--r--  1 root root 0 Sep 30  2013 wakeup_sources
drwxr-xr-x  2 root root 0 Sep 30  2013 x86
root@62-West-Wallaby-Street:/sys/kernel/debug# exit
exit

Interested to see what your results are from the above.

Feathers

**Fintan** · Oct 16, 2013, 02:39 AM

Sorry for the delay. I was actually getting some work done

Here are my results:

root@fintanws1:/sys/kernel/debug# ls -l
total 0
drwxr-xr-x 2 root root 0 Okt 16 10:34 acpi
drwxr-xr-x 30 root root 0 Okt 16 10:34 bdi
drwxr-xr-x 3 root root 0 Okt 16 10:34 binder
drwxr-xr-x 3 root root 0 Okt 16 10:34 bluetooth
drwxr-xr-x 2 root root 0 Okt 16 10:34 cleancache
drwxr-xr-x 2 root root 0 Okt 16 10:34 dma_buf
drwxr-xr-x 4 root root 0 Okt 16 10:34 dri
drwxr-xr-x 2 root root 0 Okt 16 10:34 dynamic_debug
drwxr-xr-x 2 root root 0 Okt 16 10:34 extfrag
drwxr-xr-x 2 root root 0 Okt 16 10:34 frontswap
-r--r--r-- 1 root root 0 Okt 16 10:34 gpio
drwxr-xr-x 3 root root 0 Okt 16 10:34 hid
drwxr-xr-x 3 root root 0 Okt 16 10:34 ieee80211
drwxr-xr-x 2 root root 0 Okt 16 10:34 kprobes
drwxr-xr-x 2 root root 0 Okt 16 10:34 mce
drwxr-xr-x 2 root root 0 Okt 16 10:34 mei
drwxr-xr-x 2 root root 0 Okt 16 10:34 mmc0
drwxr-xr-x 2 root root 0 Okt 16 10:34 pstate_snb
-r--r--r-- 1 root root 0 Okt 16 10:34 pwm
drwxr-xr-x 2 root root 0 Okt 16 10:34 regmap
drwxr-xr-x 3 root root 0 Okt 16 10:34 regulator
-rw-r--r-- 1 root root 0 Okt 16 10:34 sched_features
-r--r--r-- 1 root root 0 Okt 16 10:34 sleep_time
-r--r--r-- 1 root root 0 Okt 16 10:34 suspend_stats
-r--r--r-- 1 root root 0 Okt 16 10:34 sync
drwxr-xr-x 7 root root 0 Okt 16 10:34 tracing
drwxr-xr-x 3 root root 0 Okt 16 10:34 usb
-r--r--r-- 1 root root 0 Okt 16 10:34 wakeup_sources
drwxr-xr-x 2 root root 0 Okt 16 10:34 x86
drwxr-xr-x 2 root root 0 Okt 16 10:34 zbud
root@fintanws1:/sys/kernel/debug#

There is no vgaswitcheroo I can see.

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