This bug is awaiting verification that the 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-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verification-needed-xenial' to 'verification-failed-
xenial'.

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: verification-needed-xenial

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https://bugs.launchpad.net/bugs/1746411

Title:
  [linux-oem] Fix out of bound VBT pin on CNP

Status in HWE Next:
  New
Status in OEM Priority Project:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux-oem package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Invalid
Status in linux-oem source package in Xenial:
  Fix Committed

Bug description:
  === SRU Justification ===
  [Impact]
  i915 crashed when probing for VBT pin. No graphics output after that.

  [Test Case]
  Enable Legacy ROM boot option in BIOS. Screen goes blank.
  Cherrypick fixes can solve the issue. 

  [Fix]
  Handle out of bounds pin value more appropriately.
  Patches from Jani are most refactoring, but the fix we want depends on
  them.
  Patches from Rogrigo are the fixes we want. These patches are also
  picked base on his suggestion,
  https://bugs.freedesktop.org/show_bug.cgi?id=104139#c7
    
  [Regression Potential]
  Low. CNL and CNP are still quite new. These commits are limited to them.

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