Indeed, aic94xx firmware is missing from initrd.gz in 10.04.1. Perhaps it was generated by initramfs-tools before they were fixed (in 0.92bubuntu54)?
For PXE boot, the workaround is to create another initrd with a single file inside (the firmware), and then pass its name like this:
"initrd=ubuntu-installer/amd64/initrd.gz,ubuntu-installer/amd64/aic94xx-seq.gz"
Indeed, aic94xx firmware is missing from initrd.gz in 10.04.1. Perhaps it was generated by initramfs-tools before they were fixed (in 0.92bubuntu54)?
For PXE boot, the workaround is to create another initrd with a single file inside (the firmware), and then pass its name like this:
"initrd= ubuntu- installer/ amd64/initrd. gz,ubuntu- installer/ amd64/aic94xx- seq.gz"