ReBar enabled on iGPU instead of dGPU

[starrycat2015]

System

• Motherboard: Alienware Aurora R6
• BIOS Version: 1.0.23
• GPU: Vega 64/1080Ti
• [ x ] CSM is turned off. Make sure to confirm this in the BIOS and not with GPU-Z or similar since it can be inaccurate
• [ x ] 4G decoding is enabled. Make sure to confirm this in the BIOS and not with GPU-Z or similar since it can be inaccurate
• [ x ] UEFIPatch is applied (see Using UEFIPatch for more information). On some motherboards DSDT Patching is also needed
• [ x ] I have read Common issues (and fixes)

Description

Hello,

I am running a multi-gpu setup and I have successfully flashed the BIOS and enabled 4G decoding. However, it is enabling ReBar on my iGPU rather than my discrete/primary gpu. I have been trying to figure it out for the last few days on my own, but this seems to be beyond me. I am finally deciding to ask for help.

I've tried:

-Force enable with ASIC via Nimez drivers
-Enabled MMIO assignment with modified GRUB shell
-Setting aperture size with setup_var
-Setting BAR size to 1024, 2048, etc. via ReBarState.exe

Is this even possible? Thank you!

[xCuri0]

You have another issue, iGPU is controlled by aperture size. Maybe you didn't flash BIOS correctly

[starrycat2015]

Ah understood. I have found a new way to flash BIOS via FPT but I am getting stuck on recovery mode after flashing. Has anyone been able to get this to work on an Alienware or is the BIOS unlockable?