LowMemoryCorruption

Symptom/Bug report

If you see a bug report that says

Corrupted low memory at ffff880000005df0 (5df0 phys) = e47700000000 

or

"Corrupted low memory at" kernel warning on resume

Most likely this is related to bad bios or buggy bios.

How to Quirk this in kernel.

The fix is to add the bios "vendor" or "board" information to the List of systems that have known low memory corruption BIOS problems.

  • This list can be found in arch/x86/kernel/setup.c
  • Scroll down to where it says in comments "List of systems that have known low memory corruption BIOS problems."
  • You could match by DMI_BIOS_VENDOR or DMI_BOARD_NAME, you need to make the judgment as to which one is appropriate. You can find leads to which to use by looking at what is currently listed.
  • Build a kernel and get it tested by the originator of the bug.
  • Submit to Ubuntu Kernel Team <kernel-team@lists.ubuntu.com> and cc stable@kernel.org.

Kernel/Quirks/LowMemoryCorruption (last edited 2010-06-02 18:19:42 by manjo)