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June 24th, 2024 09:15
No HDMI sound output
I have an Inspiron 5400 AIO. Starting with BIOS upgrade 1.26 my LG TV (connected via HDMI) is not recognised as a sound output. There is only the regular speaker output and nothing else. I downgraded BIOS a few times to 1.25 (the last working version) and the HDMI soud was OK again. But after a while firmware was automatically upgraded and I lost HDMI sound again. Since than there was 2 more BIOS upgrades but it is stil not working. I tried different HDMi cable but still no good.
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Chino de Oro
9 Legend
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8.1K Posts
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June 24th, 2024 10:12
After you have downgrade to a working BIOS version, you need to go into BIOS settings, under UEFI Capsule Firmware Updates, and disable BIOS updates through UEFI capsule update packages. That will stop the automatic firmware update.
Monitor for future release of BIOS update that may have resolved the audio issue and test again. But you will have to disable the UEFI capsule firmware update every time you upgrade or downgrade the firmware.