Thanks. initramfs-tools in trusty-proposed solves this issue.
ubuntu@test:~$ zcat /boot/initrd.img-4.4.0-62-generic | cpio -idmv 2>
/dev/null
ubuntu@test:~$ find . -name 'xhci-plat*'
./lib/modules/4.4.0-62-generic/kernel/drivers/usb/host/xhci-plat-hcd.ko
ubuntu@test:~$ dpkg --list | grep initramfs-tools
ii initramfs-tools 0.103ubuntu4.7 all
tools for generating an initramfs
ii initramfs-tools-bin 0.103ubuntu4.7
amd64 binaries used by initramfs-tools
** Tags removed: verification-needed
** Tags added: verification-done
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1649213
Title:
Support rootfs on xhci-plat-hcd attached storage
Status in initramfs-tools package in Ubuntu:
Invalid
Status in initramfs-tools source package in Trusty:
Fix Committed
Status in initramfs-tools source package in Xenial:
Fix Released
Status in initramfs-tools source package in Zesty:
Invalid
Bug description:
[Impact]
If you install Ubuntu onto USB storage behind a Platform USB host controller,
it will not be able to boot because the generated initramfs will not include
the host controller driver.
[Test Case]
Install to a USB stick attached to platform USB controller and reboot.
Booting will fail because it will be unable to find the root file system.
[Regression Risk]
Driver is only loaded when system requires xhci-plat-hcd, minimizing the
impact to all other systems.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1649213/+subscriptions
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