kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

GNAServicesInc, could you please confirm this issue exists with the
latest development release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains,
could you please run the following command in the development release
from a Terminal (Applications->Accessories->Terminal), as it will
automatically gather and attach updated debug information to this
report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc5

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags added: needs-kernel-logs

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

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https://bugs.launchpad.net/bugs/930007

Title:
  When booting with 32GB ram linux fails to find optimal mtrr when i915
  (HD 3000) has 512 MB Ram

Status in The Linux Kernel:
  Confirmed
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:

  I have an ASUS P8Z68-V PRO,  W/ BIOS 1101, 32GB of RAM and I am
  running Ubuntu precise 12.04.

  In the BIOS you can set the amount of memory for the "iGPU", the
  HD3000 GPU built into my i7-2600K.

  I just upgraded to 32GB of ram.  Before the upgrade, I had this set to
  512,   had mtrr_spare_reg_nr=1 and everything worked fine.  After the
  upgrade: mtrr_cleanup: can not find optimal value, please specify
  mtrr_gran_size/mtrr_chunk_size etc.  No matter what I set
  mtrr_spare_reg_nr to I got this error.  However, I found that if I
  turned the amount of memory for the iGPU down to 256, everything works
  again.

   The  dmesg and other info for when the setting was at 512 can be
  found on the Post I made before  i discovered that changing the iGPU
  to having 256mb would fix it at
  http://ubuntuforums.org/showthread.php?p=11677053

  After changing iGPU to 256, here is the /proc/mttr
  /proc/mtrr
  reg00: base=0x000000000 (    0MB), size= 2048MB, count=1: write-back
  reg01: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back
  reg02: base=0x0bf800000 ( 3064MB), size=    8MB, count=1: uncachable
  reg03: base=0x100000000 ( 4096MB), size= 4096MB, count=1: write-back
  reg04: base=0x200000000 ( 8192MB), size= 8192MB, count=1: write-back
  reg05: base=0x400000000 (16384MB), size=16384MB, count=1: write-back
  reg06: base=0x800000000 (32768MB), size=  512MB, count=1: write-back
  reg07: base=0x820000000 (33280MB), size=  256MB, count=1: write-back
  reg08: base=0x82fe00000 (33534MB), size=    2MB, count=1: uncachable
  reg09: base=0x0d0000000 ( 3328MB), size=  256MB, count=1: write-combining

  and the dmesg is attached.

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