After first install of Ubuntu 14.04.2 LTS on brand-new HP Zbook 15 G2
I wanted to listen to music. Sound works.
However, there is a constant, quite strong very annoying noise.
This noise appears only when I use headphones. And the volume of this noise seems to be independent of the volume I chooses on the system. It is there permanently.
(it's really annoying, making this perfect machine unusable in this regard)
It seems to be along the lines of this post: Strange noise in headphones when no sound is played
So here is my output when I run
sudo aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC3228 Analog [ALC3228 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 11: HDMI 5 [HDMI 5]
Subdevices: 1/1
Subdevice #0: subdevice #0
Another fact: There are apparently 2 cards installed, but only one is showing up under System->Sound.
Edit: I am using the normal analog 3.5mm headset port on the right hand side. I can confirm, that it is not a problem of the headphones, I tested it with 3 different ones. Same result. Annoying noise. It seems to be a mix of white noise and some other varying frequencies.
Also, if I run the volume all the way down to mute, the noise stops. (which seems to confirm a software/driver problem right?)
2nd edit: There seem to be 3 audio devices:
00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller [8086:8c20] (rev 04)
Subsystem: Hewlett-Packard Company Device [103c:2253]
Flags: bus master, fast devsel, latency 0, IRQ 52
Memory at c0330000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
and
01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series] [1002:aab0]
Subsystem: Hewlett-Packard Company Device [103c:2254]
Flags: bus master, fast devsel, latency 0, IRQ 53
Memory at c0240000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
and an unrecognised RealTek card:
5f:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5249 (rev 01)
Subsystem: Hewlett-Packard Company Device 2253
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 47
Region 0: Memory at c0000000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
maybe I have to disable the one from my AMD graphics card (which is not yet supported in linux anyway) ?
Ubuntu 14.04 installed the following graphics driver by default: Gallium 0.4 on AMD CAPE VERDE
Edit 16.12.2015: Upgrading to 15.10, and the issue stays the same
