Since some days (or maybe small number of weeks) I have a crackling output on my soundsystem that is connected to my internal sound chip. It also has an echo of all the output sounds.
It does not always appear straight from startup, but sometimes appears in the first 1-2 minutes. In XFCE, the problem does not happen.
I can “solve” the problem by changing the setup in the KDE Settings --> Multimedia.
In the phonon-part, changing the setup of my AMD HDMI soundchip between one of the 4 Stereo Soundchip settings while there is a sound playing on the internal soundchip immediately resolves the crackling, the output is crystalclear until I do a reboot.
Changing any setting in the pulseaudio part does the same thing, but it has to be the Stereo soundchip parts, not the 5.1 or 7.1 or digital parts.
What else can I do to find the culprit?
I know that the AMD soundchip is nonfunctional due to missing DC/DAL, I don’t want to use it. Setting it to “Off” does not solve the problem.
My screen is connected on Displayport though.
System: Host: BS86-PC Kernel: 4.10.0-1-MANJARO x86_64 (64 bit gcc: 6.3.1)
Desktop: KDE Plasma 5.9.2 (Qt 5.8.0) Distro: Manjaro Linux
Machine: Device: desktop Mobo: ASUSTeK model: CROSSHAIR V FORMULA-Z v: Rev 1.xx
BIOS: American Megatrends v: 2201 date: 03/23/2015
CPU: Octa core AMD FX-8350 Eight-Core (-MCP-) cache: 16384 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 64245
clock speeds: max: 4000 MHz 1: 2100 MHz 2: 1400 MHz 3: 4000 MHz 4: 4000 MHz 5: 1400 MHz 6: 1400 MHz
7: 1400 MHz 8: 1400 MHz
Graphics: Card: Advanced Micro Devices [AMD/ATI] Ellesmere [Radeon RX 470/480] bus-ID: 01:00.0
Display Server: X.Org 1.19.1 driver: amdgpu Resolution: email@example.com
GLX Renderer: Gallium 0.4 on AMD POLARIS10 (DRM 3.9.0 / 4.10.0-1-MANJARO, LLVM 3.9.1)
GLX Version: 3.0 Mesa 17.0.0 Direct Rendering: Yes
Audio: Card-1 Advanced Micro Devices [AMD/ATI] Device aaf0 driver: snd_hda_intel bus-ID: 01:00.1
Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA)
driver: snd_hda_intel bus-ID: 00:14.2
Sound: Advanced Linux Sound Architecture v: k4.10.0-1-MANJARO
Network: Card: Intel 82583V Gigabit Network Connection driver: e1000e v: 3.2.6-k port: d000 bus-ID: 02:00.0
IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: HDD Total Size: 3506.7GB (80.1% used)
ID-1: /dev/sda model: Samsung_SSD_840 size: 256.1GB
ID-2: /dev/sdb model: Samsung_SSD_840 size: 250.1GB
ID-3: /dev/sdc model: ST3000DM001 size: 3000.6GB
Partition: ID-1: / size: 42G used: 21G (51%) fs: ext4 dev: /dev/sda2
ID-2: /boot size: 454M used: 82M (19%) fs: ext4 dev: /dev/sda1
ID-3: /home size: 189G used: 152G (82%) fs: ext4 dev: /dev/sda4
ID-4: swap-1 size: 4.00GB used: 0.00GB (0%) fs: swap dev: /dev/sda3
Sensors: System Temperatures: cpu: 37.4C mobo: N/A gpu: 37.0
Fan Speeds (in rpm): cpu: 0
Info: Processes: 250 Uptime: 46 min Memory: 2808.2/15949.3MB Init: systemd Gcc sys: 6.3.1
Client: Shell (bash 4.4.121) inxi: 2.3.8
Checked with KDE 17.0 RC1 usb stick - the issue does not happen there.
Checked with the AMD staging kernel (DC/DAL included): The issue also does not happen there, the graphic-soundchip is working, but it plays all sounds with a delay (about the same delay like the echo has) - but the echo I have with the Manjaro kernel is coming from the internal chip, the screen is muted.
Edit2: Manjaro Kernel 4.9 has the same behaviour like 4.10