Bug report: snd_hda_codec_conexant: CX20585 Speaker Pin (Node 0x1f) enters D3 power state during playback

Hello,

I would like to report an audio bug affecting the Conexant CX20585 chip.

Hardware: Medion Akoya E7220 (MD98740)
Audio chip: Conexant CX20585
Vendor Id: 0x14f15069
Subsystem Id: 0x1b0a20af
Driver: snd_hda_codec_conexant
Kernel: 7.0.0-15-generic
OS: Xubuntu 26.04

Problem:
Internal speaker audio cuts out after approximately 12 seconds of 
playback. The issue also occurred under Windows 10, suggesting a 
firmware/hardware bug in the CX20585.

Root cause identified:
Node 0x1f (Speaker Pin Complex) transitions from D0 to D3 during active 
playback:

   Node 0x1f [Pin Complex] wcaps 0x400501: Stereo
     Pin Default 0x90170110: [Fixed] Speaker at Int N/A
     Misc = NO_PRESENCE
     Power: setting=D3, actual=D3

The following command immediately restores audio:
   hda-verb /dev/snd/hwC0D0 0x1f SET_POWER_STATE 0

Note: setting power_save=0 for snd_hda_intel does not prevent the issue. 
The pin returns to D3 regardless.

Workaround: Manual execution of hda-verb after each audio cutout.

Request: Please consider adding a quirk to keep Node 0x1f in D0 for the 
CX20585 (Subsystem Id: 0x1b0a20af).

Thank you for your time.

Best regards,
Thomas