I've tested the latest version of the hda-intel driver for this laptop. Sound works well through the speakers. The headphone plug still doesn't mute the external speakers. The Master control can only change the volume in the headphones, while the PCM changes both external and headphone volume.
I've noticed that in some programs the sound is much loader than in others with the same mixer settings. I think the ones using oss are less loud than the ones using alsa.
I tried to load the module with model=test, but I didn't notice any change.
I haven't tried recording a lot yet, and only on an older version of the driver, I think. At least then I couldn't record with 44100Hz, but 48000Hz worked.
Here's the info on my laptop:
HP Pavilion dv2000 (dv2130ea)
Subsystem: 103c:30b2
Codec: Conexant CXT5047
Address: 0
Vendor Id: 0x14f15047
Subsystem Id: 0x103c30b2
Revision Id: 0x100000
Default PCM:
rates [0x40]: 48000
bits [0x2]: 16
formats [0x1]: PCM
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
Node 0x10 [Audio Output] wcaps 0x41d: Stereo Amp-Out
Amp-Out caps: ofs=0x17, nsteps=0x1e, stepsize=0x05, mute=1
Amp-Out vals: [0x80 0x80]
PCM:
rates [0x40]: 48000
bits [0x2]: 16
formats [0x1]: PCM
Power: 0x0
Node 0x11 [Audio Output] wcaps 0x611: Stereo Digital
PCM:
rates [0x40]: 48000
bits [0x2]: 16
formats [0x1]: PCM
Power: 0x0
Node 0x12 [Audio Input] wcaps 0x100d1b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x0e, stepsize=0x05, mute=1
Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
PCM:
rates [0x40]: 48000
bits [0x2]: 16
formats [0x1]: PCM
Power: 0x0
Connection: 6
0x19 0x14 0x15 0x1a* 0x16 0x10
Node 0x13 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x1f, nsteps=0x1e, stepsize=0x05, mute=1
Amp-Out vals: [0x1f 0x1f]
Pincap 0x081001c: OUT HP EAPD Detect
Pin Default 0x0221101f: [Jack] HP Out at Ext Front
Conn = 1/8, Color = Black
Pin-ctls: 0x40: OUT
Power: 0x0
Connection: 3
0x19* 0x10 0x16
Node 0x14 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x1f, nsteps=0x1e, stepsize=0x05, mute=1
Amp-Out vals: [0x1f 0x1f]
Pincap 0x0833c: IN OUT HP Detect
Pin Default 0x02a1102e: [Jack] Mic at Ext Front
Conn = 1/8, Color = Black
Pin-ctls: 0x20: IN
Power: 0x0
Connection: 2
0x19* 0x16
Node 0x15 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x1f, nsteps=0x1e, stepsize=0x05, mute=1
Amp-Out vals: [0x1f 0x1f]
Pincap 0x0833c: IN OUT HP Detect
Pin Default 0x40000180: [N/A] Line Out at Ext N/A
Conn = Unknown, Color = Unknown
Pin-ctls: 0x21: IN
Power: 0x0
Connection: 3
0x1c 0x19* 0x16
Node 0x16 [Pin Complex] wcaps 0x400401: Stereo
Pincap 0x0860: IN
Pin Default 0x94330121: [Fixed] CD at Int Right
Conn = ATAPI, Color = Unknown
Pin-ctls: 0x20: IN
Power: 0x0
Node 0x17 [Pin Complex] wcaps 0x400481: Stereo
Pincap 0x08324: IN Detect
Pin Default 0x95a70122: [Fixed] Mic at Int Top
Conn = Analog, Color = Unknown
Pin-ctls: 0x21: IN
Power: 0x0
Node 0x18 [Pin Complex] wcaps 0x400701: Stereo Digital
Pincap 0x0810: OUT
Pin Default 0x04440131: [Jack] SPDIF Out at Ext Right
Conn = RCA, Color = Unknown
Pin-ctls: 0x00:
Power: 0x0
Connection: 1
0x11
Node 0x19 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Amp-In caps: ofs=0x17, nsteps=0x1e, stepsize=0x05, mute=1
Amp-In vals: [0x17 0x17] [0x80 0x80] [0x80 0x80] [0x17 0x17]
Power: 0x0
Connection: 4
0x10 0x1b 0x1a 0x16
Node 0x1a [Audio Selector] wcaps 0x30050d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x1f, mute=0
Amp-Out vals: [0x03 0x03]
Power: 0x0
Connection: 3
0x15 0x14 0x17
Node 0x1b [Audio Selector] wcaps 0x300501: Stereo
Power: 0x0
Connection: 2
0x14* 0x15
Node 0x1c [Audio Output] wcaps 0x41d: Stereo Amp-Out
Amp-Out caps: ofs=0x17, nsteps=0x1e, stepsize=0x05, mute=1
Amp-Out vals: [0x80 0x80]
PCM:
rates [0x40]: 48000
bits [0x2]: 16
formats [0x1]: PCM
Power: 0x0
Node 0x1d [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x1f, nsteps=0x1e, stepsize=0x05, mute=1
Amp-Out vals: [0x1f 0x1f]
Pincap 0x08314: OUT Detect
Pin Default 0x92170110: [Fixed] Speaker at Int Front
Conn = Analog, Color = Unknown
Pin-ctls: 0x40: OUT
Power: 0x0
Connection: 3
0x1c 0x19* 0x16
Node 0x1e [Vendor Defined Widget] wcaps 0xf00000: Mono
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