Michael Marley, thank you for reporting this and helping make Ubuntu better. 
Maverick reached EOL on April 10, 2012.
Please see this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We were wondering if this is still an issue in a supported release? If
so, can you try with the latest development release of Ubuntu? ISO CD
images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command in a
supported release from a Terminal (Applications->Accessories->Terminal).
It will automatically gather and attach updated debug information to
this report.

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

Also, if you could test the latest upstream kernel available that would
be great. It will allow additional upstream developers to examine the
issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please do
not test the kernel in the daily folder, but the one all the way at the
bottom. Once you've tested the upstream kernel, please remove the
'needs-upstream-testing' tag. This can be done by clicking on the yellow
pencil icon next to the tag located at the bottom of the bug description
and deleting the 'needs-upstream-testing' text. As well, please comment
on which kernel version specifically you tested.

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not
boot, please add the tag: 'kernel-unable-to-test-upstream', and comment
as to why specifically you were unable to test it.

Please let us know your results. Thanks in advance.

** Tags added: needs-upstream-testing

** Description changed:

  I recently updated to the latest (2.6.35-8-generic) kernel on a Maverick
  system, but rebooting after the update caused Xorg not to start.  I see
  the following messages in dmesg:
  
  [   33.716949] Xorg:1316 conflicting memory types e0000000-e0546000 
write-combining<->uncached-minus
  [   33.716954] reserve_memtype failed 0xe0000000-0xe0546000, track 
write-combining, req write-combining
  [   49.853274] Xorg:1492 conflicting memory types e0000000-e0546000 
write-combining<->uncached-minus
  [   49.853279] reserve_memtype failed 0xe0000000-0xe0546000, track 
write-combining, req write-combining
  
  I also see an error in Xorg.0.log:
  
  [    49.853] (EE) NVIDIA(0): Failed to allocate primary buffer: out of
  memory.
  
  I tried reverting to the previous kernel, but this doesn't fix the
  problem.  That makes me think maybe some other update caused the
  problem, but I can't find anything that looks suspicious in dpkg.log.
+ 
+ WORKAROUND: Adding "nopat" to the kernel command line causes this
+ problem to go away.

** Changed in: linux (Ubuntu)
   Importance: Medium => Low

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

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https://bugs.launchpad.net/bugs/605837

Title:
  After recent updates, X will no longer start with the Nvidia driver on
  maverick (related to "pat"/"nopat" kernel option)

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