I can add some information to this bug (or what seems to be a bunch of
related audio bugs).
In my case it is related to my sound card, switching to and from the
soundcard audio causes the bug to appear and disappear.
Line-Out - Built-in Audio : No bug
Digital Output (S/PDIF) - EMU20k2 [Sound Blaster X-Fi Titanium Series] :
Occasionally garbled audio
I've added more info about my hardware devices and drivers:
lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family
High Definition Audio Controller (rev 05)
01:00.1 Audio device: NVIDIA Corporation GP102 HDMI Audio Controller (rev
a1)
03:00.0 Audio device: Creative Labs EMU20k2 [Sound Blaster X-Fi Titanium
Series] (rev 04)
sudo lshw -C sound
*-multimedia
description: Audio device
product: GP102 HDMI Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:17 memory:fb080000-fb083fff
*-usb
description: Audio device
product: HD Webcam C615
vendor: Logitech, Inc.
physical id: 2
bus info: usb@1:1.2
version: 0.11
serial: 27A1DFD0
capabilities: usb-2.00 audio-control
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-multimedia
description: Audio device
product: 6 Series/C200 Series Chipset Family High Definition Audio
Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 05
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:34 memory:f9300000-f9303fff
*-multimedia
description: Audio device
product: EMU20k2 [Sound Blaster X-Fi Titanium Series]
vendor: Creative Labs
physical id: 0
bus info: pci@0000:03:00.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_ctxfi latency=0
resources: irq:17 memory:f9200000-f920ffff memory:f9000000-f91fffff
memory:f8000000-f8ffffff
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https://bugs.launchpad.net/bugs/1906741
Title:
Firefox sometimes causes garbled audio
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