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Bug 856837 - ALSA HDA driver and HP onboard sound is causing crackling/popping during volume change in RHEL6
Summary: ALSA HDA driver and HP onboard sound is causing crackling/popping during volu...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.3
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Jaroslav Kysela
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks: 856838 960070
TreeView+ depends on / blocked
 
Reported: 2012-09-12 21:45 UTC by Daniel Kinon
Modified: 2018-12-01 18:23 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 856838 (view as bug list)
Environment:
Last Closed: 2013-05-20 16:37:51 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Daniel Kinon 2012-09-12 21:45:03 UTC 
Description of problem:
I did also some measurement and the ALSA HDA driver tests to eliminate the pops caused by the volume changes (volume slider changes) using a mixer application.

I believe that this issue is related directly to hardware and hardware vendor should be asked, why changing of the volume in the HDA audio codec causes pops in the analog output. I can reproduce the clicks with some hardware, but other hardware does not suffer from this issue. I verified the driver and I do not see any problems there. Also, I wrote a script changing the volume periodically using direct HDA codec writes and the pops are there (for some HDA codec types), too.

Perhaps, there might be a vendor specific workaround to set the volume without clicks outside the HDA specification from Intel, but also in this case, the hardware vendor (HDA codec vendor, PC vendor) might be asked to provide this information.


Version-Release number of selected component (if applicable):
2.6.32-279.2.1.el6.x86_64

How reproducible:
Easily on HP onboard sound.

Steps to Reproduce:
1. Move volume slider up and donw to change audio volume.
  
Actual results:
Volume change with crackling/popping.

Expected results:
Volume change with no crackling/popping.

Additional info:
Still narrowing down other affected hardware
Comment 1 Jaroslav Kysela 2012-09-13 14:53:15 UTC 
The affected platforms are HP Z400 and HP Z800 (the ALC268 audio codec). Also, I can reproduce this behaviour (clicks) using Lenovo T61 laptop (the AD1984 audio codec).
Comment 2 RHEL Program Management 2012-12-14 07:42:30 UTC 
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.
Comment 3 Daniel Kinon 2013-02-23 00:07:00 UTC 
Hey Jaroslav,
   Given the importance of this request and it getting nacked for 6.4, can you please nominate this request for 6.4.z?
Thanks,
-Dan
Comment 7 Jaroslav Kysela 2013-05-20 08:20:02 UTC 
Actually, there is no solution for these issues as far as I know. The click issues may be related to the hardware implementation. I would keep this bug for a reference and for future comments.
Comment 8 RHEL Program Management 2013-05-20 16:37:51 UTC 
Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.
Comment 9 RHEL Program Management 2013-05-20 16:38:03 UTC 
Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.
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