kernel-packages team mailing list archive

[dann frazier <dann.frazier@xxxxxxxxxxxxx>]

Public bug reported:

[Impact]
ARM64 EFI platforms have no real time clock support. This can leave a system with a very out-of-date system clock. It can be somewhat mitigated by using NTP, but that still leaves issues in early boot (inaccurate last mount times, etc).

[Test Case]
if dmesg | grep -q 'rtc-efi: setting system clock'; then
  PASS
else
  FAIL
fi

[Regression Risk]
This enables a new driver only on ARM64, so the risk should be low to other platforms. The upstream patches do refactor the rtc-efi driver but, that driver was previously only compilable on ia64, which isn't supported by Ubuntu.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: linux-lts-utopic (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Trusty)
     Importance: Undecided
         Status: Confirmed

** Affects: linux-lts-utopic (Ubuntu Trusty)
     Importance: Undecided
         Status: Confirmed

** Affects: linux (Ubuntu Utopic)
     Importance: Undecided
         Status: Confirmed

** Affects: linux-lts-utopic (Ubuntu Utopic)
     Importance: Undecided
         Status: Invalid

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

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

** Changed in: linux (Ubuntu)
       Status: Confirmed => Fix Released

** Changed in: linux (Ubuntu Utopic)
       Status: New => Confirmed

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

** Also affects: linux-lts-utopic (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux-lts-utopic (Ubuntu Trusty)
       Status: New => Confirmed

** Changed in: linux-lts-utopic (Ubuntu Utopic)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1441291

Title:
  support EFI rtc on arm64

Status in linux package in Ubuntu:
  Fix Released
Status in linux-lts-utopic package in Ubuntu:
  New
Status in linux source package in Trusty:
  Confirmed
Status in linux-lts-utopic source package in Trusty:
  Confirmed
Status in linux source package in Utopic:
  Confirmed
Status in linux-lts-utopic source package in Utopic:
  Invalid

Bug description:
  [Impact]
  ARM64 EFI platforms have no real time clock support. This can leave a system with a very out-of-date system clock. It can be somewhat mitigated by using NTP, but that still leaves issues in early boot (inaccurate last mount times, etc).

  [Test Case]
  if dmesg | grep -q 'rtc-efi: setting system clock'; then
    PASS
  else
    FAIL
  fi

  [Regression Risk]
  This enables a new driver only on ARM64, so the risk should be low to other platforms. The upstream patches do refactor the rtc-efi driver but, that driver was previously only compilable on ia64, which isn't supported by Ubuntu.

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