Comment 3 for bug 2058128

ubuntu-mini-iso is used to download a installer image into a RAM disk and to use this installer image for the actual installation. Of course you need enough RAM for the installer image. Of course this cannot work if the RAM is smaller than the sum of both images.

I saw the same error 'Failed to find /dev/pmem0, debug shell' with

qemu-system-x86_64 \
-M q35,smm=on,accel=kvm \
-smp 4 \
-gdb tcp::1234 \
-serial mon:stdio \
-device virtio-gpu-pci \
-full-screen \
-global driver=cfi.pflash01,property=secure,value=on \
-drive if=pflash,format=raw,unit=0,file=/usr/share/OVMF/OVMF_CODE_4M.fd,readonly=on \
-drive if=pflash,format=raw,unit=1,file=OVMF_VARS_4M.fd \
-cdrom /tmp/noble-mini-iso-amd64.iso \
-drive file=32g.raw,format=raw \
-m 8192