Chase, thanks for submitting the patch. It's a huge improvement. I do
see 3 issues outstanding, and am hoping to work through them in this
bug, or elsewhere. I would really appreciate your help.
(a) can you post the output of the following command?
$ lspci -v | grep -A7 Audio
00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)
Subsystem: nVidia Corporation Device cb79
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21
Memory at df480000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
(b) The noise issues are not equally bad on ever module load/reboot.
They are also most easily diagnosed in good, sound-isolating headphones.
Can you try putting in some good earphones in a quiet place, and slowly
scrolling through the Master volume slider in alsamixer?
(c) Can you reproduce the above issue with turning the volume up and
down via GNOME Volume Control (or the volume keyboard shortcuts)?
Thanks a lot!
Alexey
--
Poor support for MacBook Pro 5,1: noise, no jack sense, no in-line headset
microphones, broken volume control
https://bugs.launchpad.net/bugs/488103
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