kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Hi Mark,

Do we know if this is a regression?  It could be since RHEL 7.2 does not
have the bug.  Does this issue happen in 14.04.3 or 14.04.2?  If it is a
regression, we can go the kernel bisect route and try to find the commit
that introduced this.

It would also be good if they can test the latest mainline kernel to see if this bug is already fixed there.  It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-rc4-wily/

Thanks in advance!



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

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

** Tags added: kernel-da-key trusty

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https://bugs.launchpad.net/bugs/1571798

Title:
  Broadwell ECRC Support missing in Ubuntu

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Here is the problem statement from the Dell team:

  When booting into Ubuntu 14.04.4 with a Broadwell CPU and an Intel
  Quick Assist Card, the memory location that corresponds to ECRC is set
  to 0x01e0, when the BIOS is setting this location 0x00a0 pre-OS boot.
  This causes the card to not function unless we implement the following
  workaround using setpci.

  “setpci –s AA:BB.C 160.w=0”, where AA:BB.C is the PCI Root Path for
  the Intel Quick Assit Card.

  We’ve verified the memory location is correct when booting to other
  OSes, such as RHEL 7.2 and Windows Server 2012 R2.

  If there is any information you can give as to why this may be
  occurring in Ubuntu or where we may start to debug when the memory is
  changed, we would appreciate it.

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