I just tested the mainline Linux kernel 3.19~rc7-vivid in Ubuntu 15.04 and the followings are the result.
$ dmesg -t | egrep "(audio|rt286|INT343)" dmar: ACPI device "INT3438:00" under DMAR at fed91000 as 00:13.0 rt286 i2c-INT343A:00: Device with ID register ffff8802 is not rt286 sst-acpi INT3438:00: DesignWare DMA Controller, 8 channels input: DLL0665:01 06CB:76AD UNKNOWN as /devices/pci0000:00/INT3433:00/i2c-1/i2c-DLL0665:01/0018:06CB:76AD.0001/input/input12 haswell-pcm-audio haswell-pcm-audio: FW loaded, mailbox readback FW info: type 01, - version: 00.00, build 68, source commit id: 445e02b38dd3ac603ab1ffdc4785fbe589bfde31 broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered platform broadwell-audio: Driver broadwell-audio requests probe deferral -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1413446 Title: Audio broken on 2015 XPS 13 (9343) in I2S mode in Ubuntu 14.10/15.04 To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1413446/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs