[Bug 864735] Re: [ATI HDMI] HDMI Audio Disabled by Default (since oneiric)

[sergiodavies]

@madbiologist - Thanks for your answer.
No I have 5 of them (display ports from 0 to 4), but actually only the one 
connected to display port 4 has audio capability - and pulseaudio volume 
control (pavucontrol) is set accordingly.
Despite the pavucontrol showing audio being sent through the 4th display port, 
no audio is actually received on the other side.
The setup works with proprietary fglrx drivers, but those drivers have an 
annoying memory leak bug which fills 4GB of memory in less than one day...

Thanks for the hint on the linux kernel 4.0, I'll look at it, but will
that become available from standard repository for ubuntu Trusty?

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Title:
  [ATI HDMI] HDMI Audio Disabled by Default (since oneiric)

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[Bug 864735] Re: [ATI HDMI] HDMI Audio Disabled by Default (since oneiric)

[sergiodavies]

I'm experiencing this bug as well. Can anyone spot a problem with this
configuration?

Linux 14.04LTS clean install

$ uname -srm
Linux 3.13.0-46-generic x86_64

$ grep -Rn radeon.audio /etc/default/grub
11:GRUB_CMDLINE_LINUX_DEFAULT=quiet splash radeon.audio=1

$ xrandr -q
Screen 0: minimum 320 x 200, current 5200 x 2130, maximum 16384 x 16384
DisplayPort-0 connected primary 1600x900+80+1050 (normal left inverted right x 
axis y axis) 443mm x 249mm
   1600x900   60.0*+
   1280x1024  75.0 60.0  
   1280x960   60.0  
   1280x800   59.8  
   1152x864   75.0  
   1280x720   60.0  
   1024x768   75.1 70.1 60.0  
   832x62474.6  
   800x60072.2 75.0 60.3 56.2  
   640x48075.0 72.8 66.7 60.0  
   720x40070.1  
DisplayPort-1 connected 1600x900+1680+1050 (normal left inverted right x axis y 
axis) 443mm x 249mm
   1600x900   60.0*+
   1280x1024  75.0 60.0  
   1280x960   60.0  
   1280x800   59.8  
   1152x864   75.0  
   1280x720   60.0  
   1024x768   75.1 70.1 60.0  
   832x62474.6  
   800x60072.2 75.0 60.3 56.2  
   640x48075.0 72.8 66.7 60.0  
   720x40070.1  
DisplayPort-2 connected 1680x1050+0+0 (normal left inverted right x axis y 
axis) 473mm x 296mm
   1680x1050  59.9*+
   1400x1050  74.9  
   1280x1024  75.0  
   1440x900   75.0 59.9  
   1152x864   75.0  
   1024x768   75.1 70.1 60.0  
   832x62474.6  
   800x60072.2 75.0 60.3 56.2  
   640x48075.0 72.8 66.7 60.0  
   720x40070.1  
DisplayPort-3 connected 1680x1050+1680+0 (normal left inverted right x axis y 
axis) 473mm x 296mm
   1680x1050  59.9*+
   1400x1050  74.9  
   1280x1024  75.0  
   1440x900   75.0 59.9  
   1152x864   75.0  
   1024x768   75.1 70.1 60.0  
   832x62474.6  
   800x60072.2 75.0 60.3 56.2  
   640x48075.0 72.8 66.7 60.0  
   720x40070.1  
DisplayPort-4 connected 1920x1080+3280+1050 (normal left inverted right x axis 
y axis) 1600mm x 900mm
   1920x1080  60.0*+   50.0 59.9 24.0 24.0  
   1920x1080i 60.1 50.0 60.0  
   1280x720   60.0 50.0 59.9  
   1440x576   50.0  
   1440x576i  50.1  
   1440x480   60.0 59.9  
   1440x480i  60.1 60.1  
   720x57650.0  
   720x48060.0 59.9  
   640x48060.0 59.9  
DisplayPort-5 disconnected (normal left inverted right x axis y axis)

$ sudo lspci -vk | grep -A15 VGA
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape 
Verde PRO [FirePro W600] (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Device 2b1e
Flags: bus master, fast devsel, latency 0, IRQ 67
Memory at c000 (64-bit, prefetchable) [size=256M]
Memory at d400 (64-bit, non-prefetchable) [size=256K]
I/O ports at 2000 [size=256]
[virtual] Expansion ROM at d406 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 ?
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 
?
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] #19
Kernel driver in use: radeon

$ lspci -v | grep Audio
03:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Cape 
Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series]
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn 
HDMI Audio [Radeon HD 7700/7800 Series]
11:01.0 Multimedia audio controller: C-Media Electronics Inc CMI8738/CMI8768 
PCI Audio (rev 10)
Subsystem: C-Media Electronics Inc CMI8738/C3DX PCI Audio Device

$ aplay -l
 List of PLAYBACK Hardware Devices 
card 0: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA ATI HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA ATI HDMI], device 9: HDMI 3 [HDMI 3]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA ATI HDMI], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA ATI HDMI], device 11: HDMI 5 [HDMI 5]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: CMI8768 [C-Media CMI8768], device 0: CMI8738-MC8 [C-Media PCI DAC/ADC]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: CMI8768 [C-Media CMI8768], device 1: CMI8738-MC8 [C-Media PCI 2nd DAC]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: