https://bugs.freedesktop.org/show_bug.cgi?id=63865
--- Comment #11 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #9)
The issue can be reliably reproduced on my E-450. I bisected it to:
commit f9a37be0f02a943d63e3346b19f9c9d8d91826cb
x86: Use PCI setup data EFI can provide PCI ROMs out of band via boot services, which may not be available after boot. Add support for using the data handed off to us by the boot stub or bootloader.
The version grabbed from boot services hasn't been patches by the sbios yet so it's not usable by the driver. Macs need the boot services copy since they don't provide a way to access it after the OS loads. On non-Macs we have a method to fetch the proper vbios via acpi so we don't need this.