[BUG] ASUS ExpertBook B3402FVA headphone output extremely quiet (ALC256, 1043:1e03) #5996

• Machine: ASUS ExpertBook B3402FVA, Fedora 44, kernel 7.2.7-200.fc44.x86_64.
• Codec: Realtek ALC256, subsystem 1043:1e03.
• Symptom: headphones extremely quiet and distorted; only loudest parts audible. Speakers and headset mic work. Internal mic does not work (separate issue).
• Manual fix: hda-verb /dev/snd/hwC0D0 0x20 0x500 0x0f then hda-verb /dev/snd/hwC0D0 0x20 0x400 0x7778 makes headphones loud and clear.
• Request: add SND_PCI_QUIRK(0x1043, 0x1e03, "ASUS ExpertBook B3402FVA", ALC256_FIXUP_ASUS_HPE) to alc269_fixup_tbl[].
• alsa-info.sh URL
• lspci -vnn -s 00:1f.3

00:1f.3 Multimedia audio controller [0401]: Intel Corporation Raptor Lake-P/U/H cAVS [8086:51ca] (rev 01)
DeviceName: Onboard - Sound
Subsystem: ASUSTeK Computer Inc. Device [1043:1e03]
Flags: bus master, fast devsel, latency 32, IRQ 202, IOMMU group 14
Memory at 603d1e0000 (64-bit, non-prefetchable) [size=16K]
Memory at 603d000000 (64-bit, non-prefetchable) [size=1M]
Capabilities:
Kernel driver in use: sof-audio-pci-intel-tgl
Kernel modules: snd_soc_avs, snd_sof_pci_intel_tgl, snd_hda_intel