I've been using debian 9 from sometime, it's been good. But suddenly audio has stopped working. I used headphones, and after that it has stopped working. It is showing popular "Dummy Output" for output devices in Sound Setting. I know there are many questions and answers available in this forum and others, but I'm not getting proper diagnosis of what has happened, and how to fix it. Some tests I ran -
pacmd list-cards 0 card(s) available. aplay -L default Playback/recording through the PulseAudio sound server null Discard all samples (playback) or generate zero samples (capture) lspci -nnk | grep -A1 Audio << shows no output here>> Any pointers will be greatly appreciated. Thanks in advance.
This is on my dell inspiron laptop. Some hardware specs:
sudo dmidecode | grep -A4 'Base Board' Base Board Information Manufacturer: Dell Inc. Product Name: 07JM0H Version: A00 sudo dmidecode -s system-product-name Inspiron 5559 sudo dmidecode | grep -A4 'Audio' External Reference Designator: Audio Jack External Connector Type: Mini Jack (headphones) Port Type: Audio Port Handle 0x000D, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: JSIM1 -- Port Type: Audio Port Handle 0x0016, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: JXDP1 - CPU XDP Port
UPDATE I did diagnostic checks in BIOS. All other tests passed, except sound. When it said it played 6 tunes, I didn't hear anything, and it didn't show sound testing as passed. If sound testing is failed at BIOS level, what is the solution?