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Bug 1352176 - XPS 13 sound card undetected kernel-4.6.3
Summary: XPS 13 sound card undetected kernel-4.6.3
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 24
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-07-01 23:44 UTC by JCDoesTech
Modified: 2016-07-20 00:23 UTC (History)
7 users (show)

Fixed In Version: kernel-4.6.4-301.fc24
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-07-20 00:23:35 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)
dmesg from kernel 4.6.3 (58.94 KB, text/plain)
2016-07-01 23:44 UTC, JCDoesTech 		no flags Details
dmesg from kernel 4.5.5 (60.16 KB, text/plain)
2016-07-01 23:50 UTC, JCDoesTech 		no flags Details
View All

Description JCDoesTech 2016-07-01 23:44:41 UTC 
Created attachment 1175145 [details]
dmesg from kernel 4.6.3

Description of problem:
The Dell XPS 13 9343 sound card is undetected in kernel-4.6.3 while it is detected and functions properly in kernel-4.5.5 and kernel 4.5.7. In 4.5.* the sound card appears as broadwell-rt286 along with an HDA Intel HDMI sound card where as in 4.6.3 only the HDA Intel HDMI sound card is detected.

Version-Release number of selected component (if applicable):
kernel-4.5.5-300.fc24.x86_64 (working)
kernel-4.5.7-300.fc24.x86_64 (working)
kernel-4.6.3-300.fc24.x86_64 (not working)

How reproducible:

Steps to Reproduce:
1.Boot kernel-4.6.3 and go into gnome control panel's sound section or alsamixer "select sound card" and see that broadwell-rt286 does not appear nor any other functioning sound card name.

2. boot kernel-4.5.5 and/or 4.5.7 and go into both or either of the aforementioned locations and see that broadwell-rt286 does appear and is functional.

Actual results:
Undetected and thus non-functioning sound card

Expected results:
Detected and functioning sound card

Additional info:

(dmesg | grep "XPS 13"):
[    0.000000] DMI: Dell Inc. XPS 13 9343/0TM99H, BIOS A07 11/11/2015
Comment 1 JCDoesTech 2016-07-01 23:50:19 UTC 
Created attachment 1175146 [details]
dmesg from kernel 4.5.5
Comment 2 Josh Boyer 2016-07-02 00:48:38 UTC 
Should be fixed in the next build.  With the rebase I accidentally dropped CONFIG_DW_DMAC_CORE=y (because it's actually a terrible hack but upstream made a poor choice requiring that for sound on these platforms).
Comment 3 Fedora Update System 2016-07-12 18:31:53 UTC 
kernel-4.6.4-301.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-9a16b2e14e
Comment 4 Fedora Update System 2016-07-14 01:55:26 UTC 
kernel-4.6.4-301.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-9a16b2e14e
Comment 5 Fedora Update System 2016-07-20 00:22:34 UTC 
kernel-4.6.4-301.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
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