[GPU Not Supported] After Update 30JUN23

[Grim-18332]

I loaded BNET this morning and saw an update take place (assuming HOTFIX 1 June 30th). My game would not launch, and it was working fine yesterday. Error message was something along the lines of GPU not supported, prism device not detected.
I tried:
-rebooting.
-repairing D4.
-uninstalling GPU driver, rebooting, then re-installing it.
-reinstalling D4.

I eventually located the fenris debug log in D4 directory. The game appeared to detect both of my GPUs as indicated by these lines:
[Game] [Prism] Gpus detected (index 0 will be used):
[Game] - Intel(R) HD Graphics 530 (0x8086|0x1912)
[Game] - NVIDIA GeForce GTX 1080 (0x10de|0x1b80)

However, it appears to be choosing the integrated graphics card by default now:
[Game] Application Activated.
[Game] [Prism] Opening Prism in 1920x1080 fullscreen window on monitor 0 (3D viewport in 1920x1080). Monitor refresh rate is 60.000 Hz
[Game] [Prism] HDR Output is Off
[Game] [Prism] Sync interval is 1
[Game] Video_Card Intel(R) HD Graphics 530 (0x8086|0x1912)

-modified Windows graphics setting to use NVIDIA card for D4; didn’t fix it. Couldn’t find an option to set the preference in the NVIDIA control panel.
-tried deleting LocalPrefs files and letting the game re-create it.

The only workaround I finally discovered was to disable my integrated graphics in device manager. Please look into this.

[staygold-11709]

I am having this same issue. I disabled my integrated card in control panel and am running everything threw my GTX960m and it the game is running the worst it ever has.

[Jehu-2443]

I had the same issue. Go to LocalPrefs.txt (path: /Documents/Diablo IV/ and change from Adapter “1” to Adapter “0”.

[GxFrata-1139]

Thx you a LOT ! I wasn’t able to play since 3 days. This topic shouldn’t close !! A lots of ppl is having the same issue post 01/07/23 update and this solution is golden !!

Thx again.

[levlup1-1202]

Mine was already a 0 but I changed it to a 1 and it looks to be running better. I didn’t get the warning like before saying that my gpu wasn’t supported. Just curious why is that?

[Juzz-2297]

Thank you!
Mine was already at adapter 0, I changed it to 1 and that helped!