Arch Linux

Weyfonk

Member

From: Europe

Registered: 2014-01-08

Posts: 5

Yet another hybrid graphics issue...

Hi everyone!
I've been finding help (and funny stuff!) on these forums and the wiki for a while, but one problem remains despite Arch's awesomeness: I can't seem to shutdown, reboot or hibernate my laptop properly after switching graphics... It freezes every single time I try it, leaving me with soft lockups and acknowledging nothing but a hard shutdown.
Some info:
- Laptop: Acer 5820TG with Intel (integrated) and ATI HD 5650 (dedicated) graphics
- vgaswitcheroo seems to work:

[root@funbox tan]# echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch 
[root@funbox tan]# cat /sys/kernel/debug/vgaswitcheroo/switch 
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Pwr:0000:01:00.0
2:DIS-Audio: :Pwr:0000:01:00.1
[root@funbox tan]# echo "OFF" > /sys/kernel/debug/vgaswitcheroo/switch
→ Overheating stops and battery consumption decreases, as expected

However, the "vgaswitcheroo" folder disappears as soon as "OFF" has been echo-ed to "switch":

[root@funbox tan]# cat /sys/kernel/debug/vgaswitcheroo/switch 
cat: /sys/kernel/debug/vgaswitcheroo/switch: Datei oder Verzeichnis nicht gefunden

A few things keep surprising me:
1. KMS does not seem to be enabled for my integrated graphics:

[root@funbox tan]# cat /sys/module/i915/parameters/modeset 
-1

However, dmesg | grep drm shows this: http://hastebin.com/wawavayena.coffee , which leads me to think that KMS are enabled for both integrated and dedicated graphics...

2. As you have probably noticed above, the "switch" file initially contains a "DIS-Audio" entry, which I haven't seen anywhere else while browsing to solve this problem. Could this be part of the issue ?

Anyway, thanks in advance for having read all of this, and of course feel free to ask me for more information and/or tell me if I have done or understood something wrong.

Cheers,
Tan

Last edited by Weyfonk (2014-01-08 20:12:07)

clfarron4

Member

From: London, UK

Registered: 2013-06-28

Posts: 2,175

Website

Re: Yet another hybrid graphics issue...

I assume you are using the radeon driver? Or am I mistaken and you are using Catalyst?

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Weyfonk

Member

From: Europe

Registered: 2014-01-08

Posts: 5

Re: Yet another hybrid graphics issue...

Yep, I'm using radeon (as shown in the dmesg output).