Comment 42 for bug 1413446
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| Major Hayden (rackerhacker) wrote Re: Audio broken on 2015 XPS 13 (9343) in I2S mode in Ubuntu 14.10/15.04 | #42 |
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1b1ed1a
(Get the code!)
@Andon-2 -- I wish I had better news. :/
Long story short, I was able to build a 3.19-ish kernel with some additional ASoC patches earlier this week and the card showed up on the I2S bus with full input/output capabilities. However, whenever I played sounds, I never heard anything. PulseAudio showed data going into the card (signal levels were moving), but nothing was heard via speakers or headphones. I dug into amixer to figure out if something needed to be unmuted or an amplifier switched on and found nothing.
I tried with a newer kernel last night but there are some serious hard lockup bugs in the pre-3.20 patches. I'm now kicking myself for not saving the kernel branch that I had the other night. :/
The contact at Realtek feels that there's either a BIOS update required or one small option on the card isn't enabled. I'd like to test again but the kernel is a bit of a mess as of when I tested it last night. Hacking DSDT's won't fix the issue according to someone who has much more knowledge about ACPI tables than I do.
TL;DR:
- Waiting on 3.20-rc1
- Card shows up, can't hear anything
- Realtek gave me some stuff to test