This bug is awaiting verification that the linux-oem-6.11/6.11.0-1023.23
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-noble-linux-oem-6.11' to 'verification-done-
noble-linux-oem-6.11'. If the problem still exists, change the tag
'verification-needed-noble-linux-oem-6.11' to 'verification-failed-
noble-linux-oem-6.11'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-oem-6.11-v2 
verification-needed-noble-linux-oem-6.11

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Packages, which is subscribed to linux-oem-6.11 in Ubuntu.
https://bugs.launchpad.net/bugs/2110178

Title:
  The system with VMD enabled may encounter hang

Status in HWE Next:
  New
Status in linux-oem-6.11 package in Ubuntu:
  Invalid
Status in linux-oem-6.11 source package in Noble:
  Fix Committed

Bug description:
  [Impact]
  After 6.11.0-1009-oem kernel, we merged the sauce patch of the VMD PCH 
support, and it may lead to a system hang when trying to access /proc/iomem 
directly.

  [Fix]
  The VMD PCH support patches still didn't find its way to the upstream, and 
Intel need more time to process it. So, we simply fix this issue by using 
static strings. 

  [Test]
  1. Boot up the machine with VMD enabled
  2. Run `sudo fwts -q --stdout-summary -r mtrr mtrr` to make it access 
/proc/iomem directly
  3. It should show FAILED_MEDIUM
  4. Reboot and re-try step 2 for around 10 times
  5. If it fails, it shows Killed

  [Where problems could occur]
  Only change the strings to static, it increases the kernel size a couple 
bytes.

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