Re: Disable ATI HDMI audio from snd_hda_intel (was Re: Disable PCI devices via systemd)

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On 07/30/2013 03:18 PM, poma wrote:
> On 30.07.2013 17:15, Raman Gupta wrote:
>> On 07/30/2013 12:00 AM, poma wrote:
>>> On 30.07.2013 05:47, Raman Gupta wrote:
>>>> I cannot blacklist the module, because the "snd_hda_intel" module that
>>>> drives the Intel sound card on my motherboard also recognizes the ATI
>>>> cards, according to lspci-v.
>>>>
>>>> [...] is there an alternate approach to turn off the HDMI sound cards
>>>> on the ATI cards?
>>>>
>>>
>>> $ modinfo radeon | grep audio
>>> parm:           audio:Audio enable (1 = enable) (int)
>>>
>>
>> Note I use fglrx to drive the video cards -- I should have mentioned
>> that before. With fglrx, it appears to be the snd_hda_intel module
>> that is driving the HDMI devices. dmesg shows:
>>
>> [42595.178256] ALSA sound/pci/hda/hda_intel.c:3053 0000:01:00.1:
>> Handle VGA-switcheroo audio client
>> [...]
>> [42595.277831] ALSA sound/pci/hda/hda_intel.c:3053 0000:02:00.1:
>> Handle VGA-switcheroo audio client
>>
>> And lspci:
>>
>> # lspci -k | grep -E "Audio" -A 2
>> 00:1b.0 Audio device: Intel Corporation Patsburg High Definition Audio
>> Controller (rev 05)
>>         Subsystem: ASUSTeK Computer Inc. Device 84d8
>>         Kernel driver in use: snd_hda_intel
>> --
>> 01:00.1 Audio device: ATI Technologies Inc Device aaa0
>>         Subsystem: Hightech Information System Ltd. Device aaa0
>>         Kernel driver in use: snd_hda_intel
>> --
>> 02:00.1 Audio device: ATI Technologies Inc Device aaa0
>>         Subsystem: Hightech Information System Ltd. Device aaa0
>>         Kernel driver in use: snd_hda_intel
>>
>>
>> Unlike "radeon", snd_hda_intel does not appear to have a param to just
>> disable the VGA-switcheroo stuff without also disabling the audio from
>> my motherboard.
>>
>> Any other ideas before I fall back to the hammer of disabling the PCI
>> device completely?
>>
>> Regards,
>> Raman
>>
> 
> $ lsmod | grep snd

# lsmod | grep snd
snd_hda_codec_hdmi     41088  0
snd_hda_codec_realtek    46021  1
snd_usb_audio         145270  2
snd_usbmidi_lib        24713  1 snd_usb_audio
snd_rawmidi            29531  1 snd_usbmidi_lib
snd_hda_intel          44021  3
snd_hda_codec         178680  3
snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep              17650  2 snd_usb_audio,snd_hda_codec
snd_seq                64877  0
snd_seq_device         14136  2 snd_seq,snd_rawmidi
snd_pcm                98004  4
snd_usb_audio,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc         18268  2 snd_pcm,snd_hda_intel
snd_timer              28690  2 snd_pcm,snd_seq
snd                    79379  22
snd_hda_codec_realtek,snd_usb_audio,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device
soundcore              14491  1 snd

(FYI: blacklisting snd_hda_codec_hdmi has no effect)

Regards,
Raman
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