[coreboot - Bug #619] (New) Lenovo T480s headphone jack detection is inconsistent - fix for T480 can be applied.

Issue #619 has been reported by Oberon 4071.

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Bug #619: Lenovo T480s headphone jack detection is inconsistent - fix for T480 can be applied.
https://ticket.coreboot.org/issues/619

* Author: Oberon 4071
* Status: New
* Priority: Normal
* Target version: none
* Start date: 2025-12-09
* Affected versions: 24.12
* Affected hardware: Lenovo T480s
* Affected OS: Linux
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The headphone jack detection on the Lenovo T480s is inconsistent, where at least in the GNOME desktop, the audio doesn't always automatically switch to the headphone jack.

There was a recent fix for this issue on the T480 with [Gerrit Change 90023](https://review.coreboot.org/c/coreboot/+/90023) .

On my own coreboot builds, I applied the same changes from this Gerrit commit from the file `src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/hda_verb.c` to the file `src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/hda_verb.c`, and the headphone jack is now working properly on my laptop. It would be great to integrate this change for the T480s into the mainline coreboot sources.



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