It's a foreign chroot (ARM) running through QEMU user mode on x86_64 (foreign binfmts are executed via qemu-emulation invocations, and system calls are translated, except maybe for STRACE). The CHROOT tree is also an overlayfs on the fresh image, so this is similar setup to a Live OS running in CHROOT and I can easily revert to base Raspberry Pi OS image if I mess something up.
So the CHROOT installation is Raspberry Pi OS LITE while the kernel and main system OS is Ubuntu with X server and GNOME Desktop running. Both systems are Debian derivations, of course. I checked today with newer kernel, but it is still same issue. I am going to check again running Debian 12 Live to verify sound does not work there too; I think it did not when I tried before. If there is a Debian ARM image without X or Desktop (not needed, wastes space), I could try using that instead.
I said at the beginning this is a bit of an exotic setup, but I have a need to run ARM GUi binaries with sound without the overhead of establishing an emulation hypervisor, which would be very slow and waste memory. This setup, despite its strangeness, works in every way (GUI, network, even pipes between ARM processes) except sound is not working as described despite all the structures in /proc, /dev, and /sys are there and functional.
So the CHROOT installation is Raspberry Pi OS LITE while the kernel and main system OS is Ubuntu with X server and GNOME Desktop running. Both systems are Debian derivations, of course. I checked today with newer kernel, but it is still same issue. I am going to check again running Debian 12 Live to verify sound does not work there too; I think it did not when I tried before. If there is a Debian ARM image without X or Desktop (not needed, wastes space), I could try using that instead.
I said at the beginning this is a bit of an exotic setup, but I have a need to run ARM GUi binaries with sound without the overhead of establishing an emulation hypervisor, which would be very slow and waste memory. This setup, despite its strangeness, works in every way (GUI, network, even pipes between ARM processes) except sound is not working as described despite all the structures in /proc, /dev, and /sys are there and functional.
Statistics: Posted by cparke — 2024-08-22 16:57