Merge branch 'mkinitcpio-fallback' into 'master'

Fix boot issues caused by missing modules in the initramfs

See merge request archlinux/arch-boxes!155

build-host.sh

@@ -54,7 +54,7 @@ function start_qemu() {
   { qemu-system-x86_64 \
     -machine accel=kvm:tcg \
     -smp 4 \
-    -m 768 \
+    -m 1024 \
     -net nic \
     -net user \
     -kernel vmlinuz-linux \

build-inside-vm.sh

@@ -83,6 +83,17 @@ function image_cleanup() {
   # Remove pacman key ring for re-initialization
   rm -rf "${MOUNT}/etc/pacman.d/gnupg/"
 
+  # The mkinitcpio autodetect hook removes modules not needed by the
+  # running system from the initramfs. This make the image non-bootable
+  # on some systems as initramfs lacks the relevant kernel modules.
+  # Ex: Some systems need the virtio-scsi kernel module and not the
+  # "autodetected" virtio-blk kernel module for disk access.
+  #
+  # So for the initial install we use the fallback initramfs, and
+  # "autodetect" should add the relevant modules to the initramfs when
+  # the user updates the kernel.
+  cp -a "${MOUNT}/boot/"{initramfs-linux-fallback.img,initramfs-linux.img}
+
   sync -f "${MOUNT}/etc/os-release"
   fstrim --verbose "${MOUNT}"
 }