Fatal Error when AutoCAD LT set to high performance graphics

[zrprice]

I'm having an issue opening AutoCAD LT when setting the windows graphics mode set to performance on Windows 11. It seems to open fine when I let Windows automatically select the GPU, or set it to use the integrated GPU, but as soon as I set Windows to use high performance settings, AutoCAD LT will not open and gives a fatal error message (see screenshots). I have tried updating/reinstalling AutoCAD, as well as updating/rolling-back/reinstalling graphics drivers, which hasn't seemed to solve the issue.

[zrprice]

I'm having an issue opening AutoCAD LT when setting the windows graphics mode set to performance on Windows 11. It seems to open fine when I let Windows automatically select the GPU, or set it to use the integrated GPU, but as soon as I set Windows to use high performance settings, AutoCAD LT will not open and gives a fatal error message (see screenshots). I have tried updating/reinstalling AutoCAD, as well as updating/rolling-back/reinstalling graphics drivers, which hasn't seemed to solve the issue.

[pendean]

May I ask why you think you need it? or wish to do that? Wondering if you are having a performance issue you wish to rectify.

Is your screenshot from the Radeon Driver Interface? It looks to be from Windows11 perhaps.

I see you are in Win11, which build?

Share with us the screenshots from your ABOUT and GRAPHICSCONFIG command pop-ups when you can please.

[pendean]

May I ask why you think you need it? or wish to do that? Wondering if you are having a performance issue you wish to rectify.

Is your screenshot from the Radeon Driver Interface? It looks to be from Windows11 perhaps.

I see you are in Win11, which build?

Share with us the screenshots from your ABOUT and GRAPHICSCONFIG command pop-ups when you can please.

[zrprice]

Often times, I am in a drawing with multiple XREFs that utilize a large amount of GPU power. My laptop is equipped with an AMD WX 4150, and I would like to utilize this rather than the integrated GPU, since I am always docked anyhow. I am utilizing Windows 11 Version 10.0.22621 Build 22621. I can't seem to find where to change settings in the Radeon interface, but on my previous machine (which was running Windows 10) seemed to work fine using the windows power settings. I have attached screenshots as requested, which shows it using the Intel UHD 630. Thanks for the help.

[zrprice]

Often times, I am in a drawing with multiple XREFs that utilize a large amount of GPU power. My laptop is equipped with an AMD WX 4150, and I would like to utilize this rather than the integrated GPU, since I am always docked anyhow. I am utilizing Windows 11 Version 10.0.22621 Build 22621. I can't seem to find where to change settings in the Radeon interface, but on my previous machine (which was running Windows 10) seemed to work fine using the windows power settings. I have attached screenshots as requested, which shows it using the Intel UHD 630. Thanks for the help.

[pendean · Accepted solution]

Thanks for the screenshots. It is often best to let your OS guide usage on a laptop, it is detecting something incompatible most likely. Latest/current drivers from your laptop maker are best too.

Try turning LINESMOOTHING and LINEFADING variables first. Type them at the commandline.
Then set GFXDX12 variable to 0 (that's a zero) and restart AutoCAD/LT 2023.1.2

The above can be set with your default lower graphics card.

Make the switch.

I'm not on Win11, but in Win10, and not using your laptop, but most higher end GPUs install their own driver with it's own controls and interface that allow you to do what you seek to do, bypassing Windows controls. Try that when you find it.

You might also wish to check this box either way

[pendean · Accepted solution]

Thanks for the screenshots. It is often best to let your OS guide usage on a laptop, it is detecting something incompatible most likely. Latest/current drivers from your laptop maker are best too.

Try turning LINESMOOTHING and LINEFADING variables first. Type them at the commandline.
Then set GFXDX12 variable to 0 (that's a zero) and restart AutoCAD/LT 2023.1.2

The above can be set with your default lower graphics card.

Make the switch.

I'm not on Win11, but in Win10, and not using your laptop, but most higher end GPUs install their own driver with it's own controls and interface that allow you to do what you seek to do, bypassing Windows controls. Try that when you find it.

You might also wish to check this box either way

[zrprice]

Seems like the switch from DX12 to DX11 did the trick! Thanks for your help.

[zrprice]

Seems like the switch from DX12 to DX11 did the trick! Thanks for your help.