Public bug reported:

The current kernel in trusty-proposed has changed rtc-efi to a module on
arm64:

ubuntu@ubuntu:~$ grep RTC_DRV_EFI /boot/config-3.13.0-9*
/boot/config-3.13.0-98-generic:CONFIG_RTC_DRV_EFI=y
/boot/config-3.13.0-99-generic:CONFIG_RTC_DRV_EFI=m

This breaks setting the clock on boot:

ubuntu@ubuntu:~$ dmesg | grep hctosys
[    4.092231] /build/linux-KhcBx3/linux-3.13.0/drivers/rtc/hctosys.c: unable 
to open rtc device (rtc0)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu Trusty)
     Importance: High
         Status: Triaged

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Trusty)
       Status: New => Triaged

** Changed in: linux (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
   Importance: High => Undecided

** Changed in: linux (Ubuntu)
       Status: Triaged => Invalid

** Description changed:

- The current kernel in trusty-proposed has changed rtc-efi to a module:
+ The current kernel in trusty-proposed has changed rtc-efi to a module on
+ arm64:
  
  ubuntu@ubuntu:~$ grep RTC_DRV_EFI /boot/config-3.13.0-9*
  /boot/config-3.13.0-98-generic:CONFIG_RTC_DRV_EFI=y
  /boot/config-3.13.0-99-generic:CONFIG_RTC_DRV_EFI=m
  
  This breaks setting the clock on boot:
  
  ubuntu@ubuntu:~$ dmesg | grep hctosys
  [    4.092231] /build/linux-KhcBx3/linux-3.13.0/drivers/rtc/hctosys.c: unable 
to open rtc device (rtc0)

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https://bugs.launchpad.net/bugs/1634585

Title:
  [REGRESSION] rtc-efi no longer statically linked on arm64

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Trusty:
  Triaged

Bug description:
  The current kernel in trusty-proposed has changed rtc-efi to a module
  on arm64:

  ubuntu@ubuntu:~$ grep RTC_DRV_EFI /boot/config-3.13.0-9*
  /boot/config-3.13.0-98-generic:CONFIG_RTC_DRV_EFI=y
  /boot/config-3.13.0-99-generic:CONFIG_RTC_DRV_EFI=m

  This breaks setting the clock on boot:

  ubuntu@ubuntu:~$ dmesg | grep hctosys
  [    4.092231] /build/linux-KhcBx3/linux-3.13.0/drivers/rtc/hctosys.c: unable 
to open rtc device (rtc0)

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