Arch Linux

And1G

Member

From: Deutschland

Registered: 2012-08-07

Posts: 41

[solved] No sound and AMD-Vi: Event logged

Hello,

Today I started to migrate my HTPC from openElec to Arch Linux since several things started to annoy me.
For now, I have made a fresh install and installed XBMC but I can't get audio. It is a AMD setup and has an Asus Xonar XD PCIe card installed. Integrated HD Audio is disabled.

The user xbmc is in the audio group and when I ssh into the HTPC and try to play a file with aplay I get tons of these on the TV:

[   46.215678] AMD-Vi: Event logged [IO_PAGE_FAULT device=02:00.0 domain=0x0000 address=0x0000000000100000 flags=0x0050]

Channels are unmuted and I priorized the output with the following alsa-base.conf:

options snd slots=snd_virtuoso
options snd_virtuoso index=0

Alsamixer shows the desired sound card as default.

xbmc@xbmc ~ % LANG= aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: DX [Xonar DX], device 0: Multichannel [Multichannel]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: DX [Xonar DX], device 1: Digital [Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

xbmc@xbmc ~ % aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=DX
    Xonar DX, Multichannel
    Default Audio Device
sysdefault:CARD=DX
    Xonar DX, Multichannel
    Default Audio Device
front:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Front speakers
surround40:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.0 Surround output to Front and Rear speakers
surround41:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DX,DEV=0
    Xonar DX, Multichannel
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DX,DEV=0
    Xonar DX, Multichannel
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=HDMI,DEV=0
    HDA ATI HDMI, HDMI 0
    HDMI Audio Output

Setting iommu=pt as suggested here did not do any trick...
Does anyone here have a hint of what can be wrong?

Maybe this is interesting, too. The device, the AMD-Vi-Event refers to, is the mentioned sound card.

xbmc@xbmc ~ % lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) I/O Memory Management Unit
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Trinity [Radeon HD 7480D]
00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Trinity HDMI Audio Controller
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 03)
00:10.1 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 03)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 11)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 14)
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD] FCH Azalia Controller (rev 01)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 11)
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] FCH PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller (rev 11)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) Processor Function 5
01:00.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI Express-to-PCI Bridge (rev aa)
02:04.0 Multimedia audio controller: C-Media Electronics Inc CMI8788 [Oxygen HD Audio]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 06)

Last edited by And1G (2013-08-20 13:43:11)

And1G

Member

From: Deutschland

Registered: 2012-08-07

Posts: 41

Re: [solved] No sound and AMD-Vi: Event logged

Can't anyone help on this one? I just checked with a Fedora 19 Live image (Kernel 3.9.5) and I get the same error messages in dmesg as in this Arch installation, also no audio.
I believe the problem here might not be directly audio related, but where could I search for the cause?
Also, I don't really think it's a hardware failure since audio is working nice with openElec (using Kernel 3.10, if I remember that right)...

Edit: So I've set up openELEC to boot (over PXE, so I don't have to reinstall everything) and sound is working out of the box. Here is some data for comparison to the above statements from the Arch system:

xbmc:~ # cat /proc/cmdline 
root=/dev/ram0 rdinit=/init BOOT_IMAGE=openelec/KERNEL ip=dhcp boot=NFS=192.168.178.20:/srv/nfs/openelec disk=NFS=192.168.178.20:/srv/nfs/openelec overlay

xbmc:~ # uname -r
3.10.5

xbmc:~ # lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Root Complex
00:00.2 IOMMU: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) I/O Memory Management Unit
00:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Device 9993
00:01.1 Audio device: Advanced Micro Devices [AMD] nee ATI Device 9902
00:02.0 PCI bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:04.0 PCI bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Root Port
00:10.0 USB controller: Advanced Micro Devices [AMD] Hudson USB XHCI Controller (rev 03)
00:10.1 USB controller: Advanced Micro Devices [AMD] Hudson USB XHCI Controller (rev 03)
00:11.0 SATA controller: Advanced Micro Devices [AMD] Hudson SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11)
00:12.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11)
00:13.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11)
00:13.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11)
00:14.0 SMBus: Advanced Micro Devices [AMD] Hudson SMBus Controller (rev 14)
00:14.2 Audio device: Advanced Micro Devices [AMD] Hudson Azalia Controller (rev 01)
00:14.3 ISA bridge: Advanced Micro Devices [AMD] Hudson LPC Bridge (rev 11)
00:14.4 PCI bridge: Advanced Micro Devices [AMD] Hudson PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11)
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices [AMD] Family 15h (Models 10h-1fh) Processor Function 5
01:00.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI Express-to-PCI Bridge (rev aa)
02:04.0 Multimedia audio controller: C-Media Electronics Inc CMI8788 [Oxygen HD Audio]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)

xbmc:~ # aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: DX [Xonar DX], device 0: Multichannel [Multichannel]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: DX [Xonar DX], device 1: Digital [Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Generic [HD-Audio Generic], device 0: ALC887-VD Analog [ALC887-VD Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Generic [HD-Audio Generic], device 1: ALC887-VD Digital [ALC887-VD Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

xbmc:~ # aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=DX
    Xonar DX, Multichannel
    Default Audio Device
sysdefault:CARD=DX
    Xonar DX, Multichannel
    Default Audio Device
front:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Front speakers
surround40:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.0 Surround output to Front and Rear speakers
surround41:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DX,DEV=0
    Xonar DX, Multichannel
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DX,DEV=0
    Xonar DX, Multichannel
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=HDMI,DEV=0
    HDA ATI HDMI, HDMI 0
    HDMI Audio Output
default:CARD=Generic
    HD-Audio Generic, ALC887-VD Analog
    Default Audio Device
sysdefault:CARD=Generic
    HD-Audio Generic, ALC887-VD Analog
    Default Audio Device
front:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Analog
    Front speakers
surround40:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Generic,DEV=0
    HD-Audio Generic, ALC887-VD Digital
    IEC958 (S/PDIF) Digital Audio Output

Not a single one of these AMD-Vi Events is in the dmesg output.

Does anyone have a clue on how I could figure out if they installed uncommon patches or use weird parameters to get all this running?

Edit #2:
So I've searched through some of these odd IOMMU options and found this: https://www.kernel.org/doc/Documentatio … ptions.txt
I tried iommu=soft as a kernel parameter and I get audio output and the AMD-Vi Events are no longer present. But can anyone explain to me what exactly I have done here? Using a "software bounce buffering" seems weird to me if I have some hardware present, that can do such things (The IOMMU, I assume)...
Since this really does not look like only audio-related problem, can someone perhaps move the thread to the right place. Although I'm not quite sure which this will be.

Last edited by And1G (2013-08-19 22:12:20)

Mo6eB

Member

Registered: 2013-09-07

Posts: 3

Re: [solved] No sound and AMD-Vi: Event logged

Your motherboard is broken (specifically, the bios is shit) and doesn't properly support AMD-Vi. Setting iommu=soft completely bypasses the hw iommu and uses sw iommu. This means you cannot do pci pass-through for virtual machine guests, which sounds like something you don't need.