https://bugzilla.kernel.org/show_bug.cgi?id=100281

            Bug ID: 100281
           Summary: CPU suspend & alsa conflict
           Product: ACPI
           Version: 2.5
    Kernel Version: 3.19.0-21-generic
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

When not touching mouse and keyboard audio stuttering appears. Stuttering
appears when CPU load become slow down. In task manager i have seen normal cpu
load approx 20-30 % and 3% when audio stuttering comes. When did not touch
keyboard and mouse audio stuttering appears at 4 or 8 or 2 sec. and continues 4
- 5 sec. and this effect looping.

Sound cards recognized by the system:
00:07.0 Audio device [0403]: NVIDIA Corporation MCP72XE/MCP72P/MCP78U/MCP78S
High Definition Audio [10de:0774] (rev a1)
Sound cards recognized by ALSA:
00:07.0 Audio device [0403]: NVIDIA Corporation MCP72XE/MCP72P/MCP78U/MCP78S
High Definition Audio [10de:0774] (rev a1)
Sound cards recognized by ALSA, and activated:
00:07.0 Audio device [0403]: NVIDIA Corporation MCP72XE/MCP72P/MCP78U/MCP78S
High Definition Audio [10de:0774] (rev a1)

00-00: ALC662 rev1 Analog : ALC662 rev1 Analog : playback 1 : capture 1
00-01: ALC662 rev1 Digital : ALC662 rev1 Digital : playback 1
00-02: ALC662 rev1 Alt Analog : ALC662 rev1 Alt Analog : capture 1
00-03: HDMI 0 : HDMI 0 : playback 1

alsactl version 1.0.29 or 1.0.28 - same effect.

3.19.0-21-generic #21-Ubuntu SMP Sun Jun 14 18:31:11 UTC 2015 x86_64 x86_64
x86_64 GNU/Linux 

dmesg --level=err,warn: http://paste.debian.net/250409/
lspci                   http://paste.debian.net/250778/
lspci -v                http://paste.debian.net/250779/

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