Ubuntu
linux package

  1. Trusty (14.04)
  2. Bug #1301590
  3. Comment #8

Comment 8 for bug 1301590

Revision history for this message
Achille Fouilleul (achille-fouilleul) wrote :

I think there is a bug, even in the latest (3.13.0-23.45) revision.
It probably affects any 32-bit EFI system.

One easy way to fix it is to insert the following line in efi_32.c:efi_map_region():

        set_bit(EFI_OLD_MEMMAP, &x86_efi_facility);

This helps ensure that the function efi.c:runtime_code_page_mkexec() is called by efi_enter_virtual_mode().
I have rebuilt the kernel with this change and my machine runs fine now.

A temporary workaround is to use the efi=old_map kernel parameter.