Laptop: Acer Predator G9-791 (V1.10 BIOS) Codec: ALC255 My laptop has two speakers (front left and right), and a subwoofer. Both left and right channel audio only plays out the subwoofer and nothing out of the left and right speakers. That is only the case with the internal speakers though. If I hook up external speakers over 3.5mm, audio is fine out of the external speakers.
Created attachment 256159 [details] Registry export from Windows for pin layouts
Played around with HDAAnalyzer a bit and I believe I got a fix. The following HDA verbs unmute the left and right speakers, and allows the amp to power them: sudo hda-verb '/dev/snd/hwC0D0' '0x1b' '0x300' '0x9000' sudo hda-verb '/dev/snd/hwC0D0' '0x1b' '0x300' '0xa000' sudo hda-verb '/dev/snd/hwC0D0' '0x1b' '0x707' '0x60' In HDAAnalyzer, the same can be accomplished by going under card-0 > codec-0 > Node[0x1b] PIN, going under the Output Amplifer section, unmuting Val[0] and Val[1], going under Widget Control, and selecting OUT.
Here's the diff from HDAAnalyzer also: Diff for codec 0/0 (0x10ec0255): --- +++ @@ -184,25 +184,25 @@ DefAssociation = 0x3, Sequence = 0x0 Pin-ctls: 0x24: IN VREF_80 Unsolicited: tag=0x02, enabled=1 Power: setting=D3, actual=D3 Node 0x1b [Pin Complex] wcaps 0x40058f: Stereo Amp-In Amp-Out Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0 Amp-In vals: [0x00 0x00] Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1 - Amp-Out vals: [0x80 0x80] + Amp-Out vals: [0x00 0x00] Pincap 0x0001373c: IN OUT HP EAPD Detect Vref caps: HIZ 50 GRD 80 100 EAPD 0x2: EAPD Pin Default 0x411111f0: [N/A] Speaker at Ext Rear Conn = 1/8, Color = Black DefAssociation = 0xf, Sequence = 0x0 Misc = NO_PRESENCE - Pin-ctls: 0x20: IN VREF_HIZ + Pin-ctls: 0x60: IN OUT VREF_HIZ Unsolicited: tag=0x00, enabled=0 Power: setting=D3, actual=D3 Connection: 2 0x0c* 0x0d Node 0x1c [Vendor Defined Widget] wcaps 0xf00000: Mono Node 0x1d [Pin Complex] wcaps 0x400400: Mono Pincap 0x00000020: IN Pin Default 0x40e89b2d: [N/A] Reserved at Ext N/