From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 26891] Radeon KMS fails with inaccessible AtomBIOS on systems
	with (U)EFI boot
Date: Tue, 18 Sep 2012 07:02:43 +0000
Message-ID: <bug-26891-502-wIRzHXrEeA@http.bugs.freedesktop.org/>
References: <bug-26891-502@http.bugs.freedesktop.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=26891

--- Comment #42 from Steve Smith <tarkasteve@gmail.com> 2012-09-18 07:02:43 UTC ---
Created attachment 67314
  --> https://bugs.freedesktop.org/attachment.cgi?id=67314
EFI stub boot, 3.6-rc6

This doesn't work for me either, using EFI stub booting direct from Refind.
dmesg attached. Some additional details:

* MacBook Pro 8,3
* Arch Linux
* Kernel 3.6rc6
* Kernel command-line: vmlinuz-linux-mainline-3.x.efi
root=/dev/disk/by-label/Root ro add_efi_memmap radeon.modeset=1 i915.modeset=1
i915.lvds_channel_mode=2 initrd=\EFI\arch\initramfs-linux-mainline-3.x.img 

Relevent log lines:

[    5.146024] vga_switcheroo: enabled
[    5.146064] radeon 0000:01:00.0: Invalid ROM contents
[    5.146127] radeon 0000:01:00.0: Invalid ROM contents
[    5.146156] [drm:radeon_get_bios] *ERROR* Unable to locate a BIOS ROM
[    5.146190] radeon 0000:01:00.0: Fatal error during GPU init
[    5.146221] [drm] radeon: finishing device.
[    5.146222] [TTM] Memory type 2 has not been initialized
[    5.147271] vga_switcheroo: disabled
[    5.147416] radeon: probe of 0000:01:00.0 failed with error -22

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