Bug 25532

Summary:	Bluetooth intermittent high pitch noise Broadcom 4353
Product:	Drivers	Reporter:	Louis (lixo1)
Component:	Bluetooth	Assignee:	drivers_bluetooth (drivers_bluetooth)
Status:	RESOLVED INVALID
Severity:	high	CC:	acquisition, alan
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.38	Subsystem:
Regression:	No	Bisected commit-id:

Description Louis 2010-12-23 10:34:03 UTC

On a HP Envy 17 laptop, I'm observing an intermittent high pitch noise (acoustic-electronic) when the btusb module is loaded. This behavior is not present when kernel is configured without bluetooth support.

This issue is present in kernels > 2.6.32 and it's not a regression.
Please let me know the information that you need, if needed I can also try to record with a microphone the noise.

Comment 1 Louis 2010-12-23 10:35:18 UTC

*** Bug 21222 has been marked as a duplicate of this bug. ***

Comment 2 mohegan 2011-04-20 19:36:37 UTC

Same bug for with the same computer (HP Envy 17). When I activate the bluetooth, I have same noise. It's very low and I think it come near from the subwoofer.

Comment 3 Alan 2012-08-14 15:04:44 UTC

If its hardware noise then it's not something the software can do anything about