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Audio > worked correctly for several days after Arch Linux (with CachyOS kernel) > install, then stopped without any change in hardware, kernel version or audio- > related software stack and has not recovered since across multiple kernels and > distributions. Could I just double check when you say the sound is working under Windows/Dell SupportAssist does that definitely include the headphones? The cs42l45 (note it is l45 here) only drives the headphones and the cs35l57 drives the speakers. On Linux as these are all bundled together into a soundcard, the cs42l45 failing to probe will be affecting all audio, however on Windows I suspect each is treated separately. So the speakers may continue to function even if the headphones are broken. Thanks for reporting this, apologies for the trouble. We will have a look through the logs and see what we can come up with. Thanks, Charles