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    ALSA: hda/realtek - There is no loopback mixer in the ALC234/274/294 · 532a7784
    Hui Wang 提交于
    We have a Lenovo machine with the codec ALC294 on it, without the
    patch, the Node 0x0b is regarded as the loopback mixer, but the Node
    0x0b in this codec is "Vendor Defined Widget" instead of the audio
    mixer, please see the log below:
    
    Node 0x0b [Vendor Defined Widget] wcaps 0xf00000: Mono
      Control: name="Beep Playback Volume", index=0, device=0
        ControlAmp: chs=3, dir=In, idx=4, ofs=0
      Control: name="Beep Playback Switch", index=0, device=0
        ControlAmp: chs=3, dir=In, idx=4, ofs=0
    
    And I have consulted with Realtek, so far the ALC234/274/294 all don't
    have loopback mixer.
    
    Cc: Kailang Yang <kailang@realtek.com>
    Signed-off-by: NHui Wang <hui.wang@canonical.com>
    Signed-off-by: NTakashi Iwai <tiwai@suse.de>
    532a7784
patch_realtek.c 231.4 KB