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some laptop thinkpad t440p , with windows 8 is fine no noise.

with ubuntu 12.04 and 13.10 , if I plug the speakers without music but with the volume up(even low) there is annoying noise come out.

to interrupt the noise I need to put in mute mode.

aplay -l
*** List of PLAYBACK Hardware Devices ****
card 0: MID [HDA Intel MID], device 3: HDMI 0 [HDMI 0]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
 card 0: MID [HDA Intel MID], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
Subdevice #0: subdevice #0
0: MID [HDA Intel MID], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
Subdevice #0: subdevice #0
Card 1: PCH [HDA Intel PCH], device 0: ALC292 Analog [ALC292 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0

dpkg -l | grep alsa
 ii  alsa-base                                 1.0.25+dfsg-0ubuntu4                          all          ALSA driver configuration files
 ii  alsa-utils                                                   amd64        Utilities for configuring and using ALSA
 ii  bluez-alsa:amd64                          4.101-0ubuntu8b1                              amd64        Bluetooth ALSA support
 ii  gstreamer0.10-alsa:amd64                  0.10.36-1.1ubuntu1                            amd64        GStreamer plugin for ALSA
 ii  gstreamer1.0-alsa:amd64                   1.2.0-1ubuntu1                                amd64        GStreamer plugin for ALSA

dpkg -l | grep pulseaudio
ii  gstreamer0.10-pulseaudio:amd64            0.10.31-3+nmu1ubuntu3                         amd64        GStreamer plugin for PulseAudio
ii  gstreamer1.0-pulseaudio:amd64             1.2.0-1ubuntu1                                amd64        GStreamer plugin for PulseAudio
ii  pulseaudio                                1:4.0-0ubuntu6                                amd64        PulseAudio sound server
ii  pulseaudio-module-bluetooth               1:4.0-0ubuntu6                                amd64        Bluetooth module for PulseAudio sound server
ii  pulseaudio-module-x11                     1:4.0-0ubuntu6                                amd64        X11 module for PulseAudio sound server
ii  pulseaudio-utils                          1:4.0-0ubuntu6                                amd64        Command line tools for the PulseAudio sound server

 uname -a
3.11.0-15-generic #25-Ubuntu SMP Thu Jan 30 17:22:01 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

 Card: HDA Intel PCH                                                                                                                            F1:  Help               │
 Chip: Realtek ALC292    
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I have tried with ppa "ppa:ubuntu-audio-dev/alsa-daily" and install "oem-audio-hda-daily-dkms" but still the issues . – enjoy Feb 22 '14 at 15:31
discovered that only the right earphone make the noise , on the left is ok – enjoy Mar 7 '14 at 12:57
I hear the same thing, though I get it through both channels, left and right. – cemerick Mar 8 '14 at 3:08
possible duplicate of Static background noise while using new headset Ubuntu 13.04 – BЈовић Mar 12 '14 at 16:19
I don't have this "hum" noise sometime when I unplug the power cable. – enjoy May 19 '15 at 15:58

Partial Fixed follow this:

with mkdir -p /usr/local/bin wget -O /usr/local/bin/ chmod 744 /usr/local/bin/

changed the script on /etc/init.d/xps this line:

kernel_version=$(uname -r | cut -c3-4)


kernel_version=$(uname -r | cut -c3)

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