Created attachment 133493 [details]
dmesg during cd boot with Arch kernel 4.12.3

Hi,

I have a Lenovo E420s Laptop with a hybrid ATI/Intel Card and the Radeon Card
wasn't detected correctly for ages. Now I noticed that, since I changed my Boot
from BIOS to UEFI it is detected correctly at the boot from the Install/Rescue
CD but still not at the boot from my hard drive. I am running Arch Linux.

The message "[drm:radeon_get_bios [radeon]] *ERROR* Unable to locate a BIOS
ROM" appears in the dmesg output during the hard drive boot but not during the
CD boot.

Because of a suggestion on the Arch BBS
(https://bbs.archlinux.org/viewtopic.php?pid=1730357) I am trying to report
this bug here. I hope this helps.