Arch Linux

Description: Kernel logs reports the following Firmware bug:
[...]
Aug 12 08:16:43 tiamat kernel:[Firmware Bug]: AMD-Vi: IOAPIC[9] not in IVRS table
Aug 12 08:16:43 tiamat kernel: [Firmware Bug]: AMD-Vi: IOAPIC[10] not in IVRS table
Aug 12 08:16:43 tiamat kernel: [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found
Aug 12 08:16:43 tiamat kernel: AMD-Vi: Disabling interrupt remapping
[...]

Additional info:
That's probably due to my motherboard. It is ASUS Crosshair V with an AMD-FX 8200.
Kernel package version
~$ pacman -Qi linux
Name : linux
Version : 3.15.8-1
Description : The Linux kernel and modules
Architecture : x86_64
URL : http://www.kernel.org/
Licenses : GPL2
Groups : base
Provides : kernel26=3.15.8
Depends On : coreutils linux-firmware kmod mkinitcpio>=0.7
Optional Deps : crda: to set the correct wireless channels of your country
Required By : nvidia virtualbox-host-modules
Optional For : None
Conflicts With : kernel26
Replaces : kernel26
Installed Size : 72677.00 KiB
Packager : Tobias Powalowski <tpowa@archlinux.org>
Build Date : Fri 01 Aug 2014 07:55:32 AM BST
Install Date : Tue 05 Aug 2014 07:40:21 PM BST
Install Reason : Explicitly installed
Install Script : Yes
Validated By : Signature

linux-firmware package:

$ pacman -Qi linux-firmware
Name : linux-firmware
Version : 20140603.a4f3bc0-1
Description : Firmware files for Linux
Architecture : any
URL : http://git.kernel.org/?p=linux/kernel/git/firmware/linux-firmware.git;a=summary
Licenses : GPL2 GPL3 custom
Groups : None
Provides : None
Depends On : None
Optional Deps : None
Required By : linux
Optional For : None
Conflicts With : linux-firmware-git kernel26-firmware ar9170-fw iwlwifi-1000-ucode iwlwifi-3945-ucode iwlwifi-4965-ucode iwlwifi-5000-ucode iwlwifi-5150-ucode iwlwifi-6000-ucode rt2870usb-fw rt2x00-rt61-fw rt2x00-rt71w-fw amd-ucode
Replaces : kernel26-firmware ar9170-fw iwlwifi-1000-ucode iwlwifi-3945-ucode iwlwifi-4965-ucode iwlwifi-5000-ucode iwlwifi-5150-ucode iwlwifi-6000-ucode rt2870usb-fw rt2x00-rt61-fw rt2x00-rt71w-fw amd-ucode
Installed Size : 72024.00 KiB
Packager : Thomas Bächler <thomas@archlinux.org>
Build Date : Thu 12 Jun 2014 06:31:56 PM BST
Install Date : Mon 23 Jun 2014 07:04:17 PM BST
Install Reason : Explicitly installed
Install Script : No
Validated By : Signature

Steps to reproduce:
Reboot