Alright, at least partially understanding things now. So it looks like "Decoding failed" happens generally on some platforms (and I do not understand still why this is). The difference between the generic kernel and the kvm kernel is that the kvm kernel has a built-in BLK_DEV_RAM of size (4096) whereas the generic kernel uses a module for that.
It looks like only if BLK_DEV_RAM=y is set, the code which populates the initial rootfs does try to flush and refill the ramdisk device. Otherwise the partially expanded rootfs is retained. And I guess the ramdisk size is set to small so we get the incomplete write there. I guess the solution (which does not solve the decode failure) is to change the kvm kernel config to BLK_DEV_RAM=m CONFIG_BLK_DEV_RAM_SIZE=65536 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1873809 Title: Make linux-kvm bootable in LXD VMs To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1873809/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
