>>I've also noted it uses directly a node 0x19 (Audio Output Analog)
instead of a node 0x17 (Audio Mixer), but I don't know if it's necessary
and has to do with sound quality. I guess that sound going through the
node 0x17 is hardware mixed and through the 0x19 is post-mixed by a
software driver. As I said I don't know.
node 0x17 is the analog mixer silmilar to ac97 analog mixer
you lost the mic playback volume controls and 12 dB gain of hardware PCM
playback volume
Node 0x17 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Control: name="PCM Playback Volume", index=0, device=0
Control: name="PCM Playback Switch", index=0, device=0
Control: name="Int Mic Playback Volume", index=0, device=0
Control: name="Int Mic Playback Switch", index=0, device=0
Control: name="Ext Mic Playback Volume", index=0, device=0
Control: name="Ext Mic Playback Switch", index=0, device=0
Amp-In caps: ofs=0x14, nsteps=0x2b, stepsize=0x05, mute=1
Amp-In vals: [0x14 0x14] [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80]
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 5
0x19 0x14 0x12 0x11 0x15
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https://bugs.launchpad.net/bugs/886975
Title:
Lenovo sound chip Conexant CX20549 Venice doesn't work correctly.
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