Public bug reported:
I really need help on finding the cause of the following issue that
occurred after upgrading to Gutsy. I'm an experienced user, but this
really dazzles me.
I have a dual boot, feisty/gutsy. After upgrading from feisty to gutsy
my sound output is noise "under" the audio.
I really don't know what is causing this, except that it is software
related (when booting feisty, this problem does not exist).
It is NOT from my audio system. I have checked the audio cable, on my
Denon with Bose speakers, as well as my Sennheiser headphones I hear
noise.
Sound comes through as well, but with the underlying noise. When not
playing music or anything, still noise.
It does not seem to be a problem of a user-space application, as the
noise starts right after 'loading modules' during booting.
I have tried to unload all the sound drivers, but the noise does not
disappear. Thus, indicating that no userland application is using the
sound card.
Output from lspci -v:
00:07.0 Audio device: nVidia Corporation MCP65 High Definition Audio (rev a1)
Subsystem: ASUSTeK Computer Inc. Unknown device 8286
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16
Memory at ddef4000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0
Enable-
Capabilities: [6c] HyperTransport: MSI Mapping
I run the latest gutsy update , kernel 2.6.22-10-generic
I have used audacity to record on /dev/oss and on the alsa device, and
it clearly shows the noise.
I really don't know where to file this bug report. But I'd be happy if
anyone has any idea on how to pinpoint the problem.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
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noise after upgrading to gutsy
https://bugs.launchpad.net/bugs/136261
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