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I've an Acer laptop with Windows 7 64 bit and an ATI Radeon HD 6550M Graphics card. Whenever I connect the power to charge the battery it automatically switches to the high-power GPU (ATI) instead of the low-power (Intel) GPU.

There's an option in the bios to stop such thing but it makes the GPU runs always on high-power and I can't switch to the low-power GPU.

How can I prevent the switchable graphics from automatically using the high-power GPU when charging?

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Do you want to completely disable the ATI card? –  viking Jun 17 '11 at 14:17
    
Not at all, I just want to have the option of doing the switching myself. –  Saifallah Jun 17 '11 at 14:24
    
What Acer model do you have? –  viking Jun 17 '11 at 14:28
    
Aspire Timeline X (5820TG) –  Saifallah Jun 17 '11 at 14:31
    
Have you looked at Power Settings, Power Profiles in particular, and the advanced graphics settings? (These a general things, not specific to Acer) –  viking Jun 17 '11 at 14:39

3 Answers 3

up vote 6 down vote accepted

Right-click on the Desktop and choose the option for "Configure switchable graphics". In the dialog that appears, you will see an option for "Automatically select power-saving GPU when on battery". This option controls whether the graphics switch automatically. If you uncheck the box, then the GPU should only switch when you manually change it using the specific buttons.

AMD switchable graphics

(Note, this is the procedure on my HP laptop with ATI switchable graphics. I assume it is the same or similar for your Acer, as the drivers should be the same, but I can't guarantee that it'll work.)

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That's my main problem. I've the same window with the settings in the middle but without the content (the yellow thing) and the rest. –  Saifallah Aug 3 '11 at 8:31
1  
Well now that's odd. Have you updated the graphics drivers to the latest version? –  nhinkle Aug 3 '11 at 15:11
    
Yeah just did yesterday. But now it's a little bit different (on the eye) and the option is still missing. –  Saifallah Aug 4 '11 at 8:57
    
No more a Windows user. I'll mark this answer as correct. –  Saifallah Oct 15 '12 at 13:56
    
Saifallah, Please see my answer here: superuser.com/questions/64322/… –  marcolopes Jun 12 at 16:07

I solved it by uninstalling Acer Powersmart Manager

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  1. Go to graphic properties, "catalyst control center"
  2. Click on the Power tab
  3. Click on "Disable Power Play"
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2  
PowerPlay is not related to AMD switchable graphics. PowerPlay refers to a mechanism for controlling the power consumption of a GPU, not switching between a high-performance GPU and a power-saving GPU. –  DragonLord Sep 9 '12 at 15:25

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