Arch Linux

madmanali93

Member

Registered: 2014-10-16

Posts: 1

Audio Issues after IOMMU and GPU install

So I was working on pci passthrough when I got this bug. After I installed the second GPU in my system I lost sound from the output of my motherboard. All I hear now is a constant buzz and when I play something it sounds like a feint voice that's clipped. I tried this https://wiki.archlinux.org/index.php/Pu … _crackling and the issue still remains. I am able to get audio through my gpu output but on the motherboard it doesn't work. Here is some info about my system:

/etc/default/grub

 GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on intel_iommu=igfx_off" 

uname -r

4.8.6-1-ARCH

/etc/mkinitcpio.conf

...
MODULES="vfio vfio_iommu_type1 vfio_pci vfio_virqfd"
...
HOOKS="base udev autodetect modconf block filesystems keyboard fsck modconf"

aplay -l

**** List of PLAYBACK Hardware Devices ****
card 2: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

lspci | grep -i audio

00:1b.0 Audio device: Intel Corporation C600/X79 series chipset High Definition Audio Controller (rev 06)
01:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Controller (rev a1)
02:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev a1)

Anyone know what the cause is? Also let me know if you require more information about my system.

Thanks,