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General Category => Tech Support => Topic started by: BigredRm on July 08, 2012, 10:46:28 AM



Title: Switchable graphics issue
Post by: BigredRm on July 08, 2012, 10:46:28 AM
What can I do to help you identify and fix the switchable graphics issue on laptops with ATI cards? It has kept me from playin more due to having to restart, go into BIOS, turn of dynamic card switching. This is the only program that doesn't switch to the better card when needed.


Title: Re: Switchable graphics issue
Post by: pspeed on July 08, 2012, 10:49:24 AM
What can I do to help you identify and fix the switchable graphics issue on laptops with ATI cards? It has kept me from playin more due to having to restart, go into BIOS, turn of dynamic card switching. This is the only program that doesn't switch to the better card when needed.

I'm not sure, actually.  It does it on nVidia cards also but I think in that case nVidia was nice enough to provide a driver-level option.

I believe it's actually a problem in the lwjgl library or at least how jMonkeyEngine interacts with it.  If you have other lwjgl based games that select the right card then that might be useful information for me to take to my fellow jMonkeyEngine devs.  Something is preventing lwjgl from selecting the proper card.


Title: Re: Switchable graphics issue
Post by: pspeed on July 08, 2012, 10:53:25 AM
As recently as May it doesn't seem like the lwjgl folks have any specific ideas:
http://lwjgl.org/forum/index.php?topic=4563.0


Title: Re: Switchable graphics issue
Post by: BigredRm on July 08, 2012, 11:04:32 AM
Ok, well at least there is a work around for me. Im not sure what a lwjgl based game is so im not sure if I have another.


Title: Re: Switchable graphics issue
Post by: pspeed on July 08, 2012, 11:15:28 AM
Ok, well at least there is a work around for me. Im not sure what a lwjgl based game is so im not sure if I have another.

Ah, sorry.  It's the graphics library Java games use to interact with OpenGL.  Minecraft uses it, for example.  I also see a lot of the same kinds of issues on the internet with Minecraft and switchable graphics cards... so maybe there is no easy solution.


Title: Re: Switchable graphics issue
Post by: BigredRm on July 08, 2012, 02:09:00 PM
I can run minecraft without turning my adaptive graphics to fixed.


Title: Re: Switchable graphics issue
Post by: pspeed on July 08, 2012, 03:06:27 PM
I can run minecraft without turning my adaptive graphics to fixed.

It may be that it runs fine on the lesser card, though.  I don't know if there is a way in minecraft to see which card it thinks it's using.


Title: Re: Switchable graphics issue
Post by: Moonkey on July 08, 2012, 08:44:58 PM
No option to see whatsoever in Minecraft. Pressing F3 may tell you details, but not everything.


Title: Re: Switchable graphics issue
Post by: BigredRm on July 09, 2012, 06:12:14 AM
I noticed it had 900M mem available. I fairly certain that is my ATI card.


Title: Re: Switchable graphics issue
Post by: pspeed on July 09, 2012, 08:32:05 AM
I noticed it had 900M mem available. I fairly certain that is my ATI card.

Noticed where?


Title: Re: Switchable graphics issue
Post by: Moonkey on July 09, 2012, 09:36:33 PM
The Minecraft F3 option I'm sure. It tells you Ram used/V-Mem used, and available. Its default is 1024.


Title: Re: Switchable graphics issue
Post by: BigredRm on July 17, 2012, 05:27:01 PM
yeah sorry didnt see your question but it is in the F3 screen top right

Used mem % (###MB) of 910MB