Hi there,

Here is the link for the AlsaInfo from the noisy left channel;
http://www.alsa-project.org/db/?f=1ed271006ead0cb36fd9676b3aff874c73d94652

and here is the link for the clean left channel;
http://www.alsa-project.org/db/?f=a5db942a97e99161461c6aef99b5ddf52a9e021a

The left channel is only noisy when I play back sound. I think it only
there when certain frequencies are played, or when a certain threshold
of sound volume is passed. But I am no expert, so don't take my word for
it.

I have noticed that in one report there is a sentence that is;
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 0/1

while the other is;
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 1/1

Hope this helps!

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https://bugs.launchpad.net/bugs/860517

Title:
  [Dell M1210, SigmaTel STAC9221 A1] Noise on left headphone/speaker
  channel

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