This bug is awaiting verification that the linux-intel/6.8.0-1021.28
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-intel' to 'verification-done-noble-
linux-intel'. If the problem still exists, change the tag 'verification-
needed-noble-linux-intel' to 'verification-failed-noble-linux-intel'.


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-intel-v2 
verification-needed-noble-linux-intel

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https://bugs.launchpad.net/bugs/2101083

Title:
  Can't use graphics=vnc on TDVM

Status in linux-intel package in Ubuntu:
  New
Status in linux-intel source package in Noble:
  Fix Committed
Status in linux-intel source package in Oracular:
  Fix Committed

Bug description:
  [ Impact ]

   * if a TDVM is created with vnc graphics enabled, the VM itself
  crashes, and the following entries are seen in the logs:

  2024-07-11T09:19:19.469114Z qemu-system-x86_64: Failed to get
  registers: Input/output error 2024-07-11 09:19:19.853+0000: shutting
  down, reason=crashed

  [ Fix ]

   * Backport patch 25-27 from upstream submission:
  https://lore.kernel.org/all/20250226195529.2314580-26-pbonz...@redhat.com/

  [ Test Plan ]

   * Create a Noble (24.04) Host and Guest setup following 
https://github.com/canonical/tdx/
   * Create a VM with graphics type as vnc.
   * Power the VM on.
   * Check for the qemu logs to find the aforementioned messages.

  [ Where problems could occur ]

   * KVM regression

  [ Other Info ]
   * Built and tested by intel on targeted hardware.
   * Original bug report : https://github.com/canonical/tdx/issues/202

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