HDMI 7.1 output problems on Dell Inspiron 5579 laptop

[thothsong]

With REW 5.19 32-bit, I can get Generator to work for whichever speaker I try first, and I can stop and start the output just fine. But if I change the speaker selection, I no longer get any sound output until I restart REW. With REW 5.20 RC11 32-bit and 64-bit, it's similar but worse, in that once I stop the Generator I no longer get any sound output, even if I don't change the speaker selection. Windows 10 20H2, AISO4ALL 2.15 Beta 2, Intel Display Audio. Any suggestions?

 

[thothsong]

I gave FlexASIO a try, and it's even worse: when I no longer get sound, it seems I have to reboot the laptop, not just restart REW, to get sound again.

 

[sam_adams]

As a troubleshooting step, if you have the computer attached to your AVR through a front panel AUX HDMI port, try attaching it to one of the unused HDMI ports on the back of the device and see if you get better results.

 

[thothsong]

Thanks, that spurred me to look external to the laptop. I was routing through an HDFury Diva, and that appears to be causing the problem; if I bypass the Diva and go direct, things work as expected.