Some time ago I filed https://bugzilla.redhat.com/show_bug.cgi?id=1063556 ; this was addressed upstream. I just noticed it's broken again, though. I tried a new build of my 'fedlet' image and it didn't boot; sdhci_acpi is missing from the initramfs. I suspect one of these two changes: https://git.kernel.org/cgit/boot/dracut/dracut.git/commit/modules.d/90kernel-modules/module-setup.sh?id=6dcc5e1158bf502b431491a381a16ca894f99ae2 https://git.kernel.org/cgit/boot/dracut/dracut.git/commit/modules.d/90kernel-modules/module-setup.sh?id=6d58fa27a43833737143e0788097224a559808de sdhci-acpi does seem to include sdhci_add_host , though, so the latter seems more likely.
hmmm...actually, when I run dracut -f -N on an installed system, sdhci-acpi does wind up in the generated initramfs. But it doesn't show up in the initramfs in a newly-built live image. now I get to fiddle with live image initramfs generation...joy? I guess?
eh, never mind, this isn't my problem. the live isn't booting for some other reason. the reason? damn if I know. grr.