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sundarnagarajan / rdp-thinbook-linux

Linux on the RDP Thinbook
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Highly distorted sound / feedback in headphones on kernel 4.17 #35

Open sundarnagarajan opened 6 years ago

sundarnagarajan commented 6 years ago

Model: RDP 1130 11.6-inch model ALSA driver: bytcr_rt5651

Sound over the speakers is OK The bytcr_rt5651 ALSA driver has software switching between speakers and headphone. When you switch the sound to headphones (using Sound settings), sound in the headphone is completely distorted and drowned out by a LOUD screech - like feedback

Distributions / kernels tested:

Analysis: Possibly a UCM config issue

sundarnagarajan commented 6 years ago

New version of bytcr-rt5651.conf from Hans de Goede checked in Jun-22-2018

New version of HiFi checked in by Hans de Goede checked in Jun-22-2018

With the new UCM config files, problem occurs ONLY on kernel 4.17+. Using new UCM config files, on kernel 4.17, only one output (Speaker) is shown.

sundarnagarajan commented 6 years ago

Have filed issue on Pierre Bossart's Intel UCM github repo