Bug 199815

Summary:	Static/"Thunk" Audio on Dell E7450
Product:	Drivers	Reporter:	Jason Scalia (jscalia)
Component:	Sound(ALSA)	Assignee:	Jaroslav Kysela (perex)
Status:	NEW ---
Severity:	normal	CC:	jscalia, kayne.kruse
Priority:	P1
Hardware:	Intel
OS:	Linux
Kernel Version:	4.16.9-300.fc28.x86_64	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	alsa-info from Dell E7450 Dell 7450 lspci -v -n Output Alsa info from another e7470 lspci output e7470

Description Jason Scalia 2018-05-23 18:28:34 UTC

Hello,

I am currently experiencing lot's of static and "thunks" on and off regarding audio on my Dell E7450 Laptop's line out. I've tried different speakers and headsets, with the same issue. If I mute the audio, the hissing and intermittent "Thunk" also stop.

I've tried disabling power management, with no luck:

# cat /sys/module/snd_hda_intel/parameters/power_save
0

I'll attach the output of alsa_info and lspci.

Thanks!

Comment 1 Jason Scalia 2018-05-23 18:31:23 UTC

Created attachment 276151 [details]
alsa-info from Dell E7450

Comment 2 Jason Scalia 2018-05-23 18:31:40 UTC

Created attachment 276153 [details]
Dell 7450 lspci -v -n Output

Comment 3 Kayne Krusr 2018-05-30 20:52:03 UTC

Created attachment 276277 [details]
Alsa info from another e7470

I have similar issue to Jason here.   Similar product line hw here Lattitude E7470.

cat /sys/module/snd_hda_intel/parameters/power_save  reports 0 by default on my fedora 27 system.

I will update with another lspci report.

Comment 4 Kayne Krusr 2018-05-30 20:53:30 UTC

Created attachment 276279 [details]
lspci output e7470