[Bug 1842284] Re: initramfs does not copy ehci-platform

[Ike Panhc]

** Description changed:

- ehci-platform is the USB host driver for several platform and also
- available in Xenial HWE kernel, but initramfs does not copy it into
- initrd and system can not boot from USB storage on that machine.
+ [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 ehci-platform, minimizing the impact to all other systems.

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https://bugs.launchpad.net/bugs/1842284

Title:
  initramfs does not copy ehci-platform

Status in initramfs-tools package in Ubuntu:
  New
Status in initramfs-tools source package in Xenial:
  New

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 ehci-platform, minimizing the impact to all other systems.

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