This bug was fixed in the package alsa-lib - 1.2.2-2.1ubuntu1
---------------
alsa-lib (1.2.2-2.1ubuntu1) focal; urgency=medium
*
debian/patches/0001-conf-USB-Audio-Add-HP-Thunderbolt-Dock-in-the-IEC958.patch:
- Disable IEC958 on HP Thunderbolt Dock (lp: #1883670)
-- Kai-Heng Feng <[email protected]> Tue, 16 Jun 2020
17:52:07 +0800
** Changed in: alsa-lib (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1883670
Title:
Disable IEC958 on HP Thunderbolt Dock
Status in HWE Next:
New
Status in OEM Priority Project:
Confirmed
Status in alsa-lib package in Ubuntu:
Fix Released
Status in alsa-lib source package in Focal:
Fix Released
Status in alsa-lib source package in Groovy:
Fix Released
Bug description:
[Impact]
On HP Thunderbolt Dock, unusable SPDIF can be selected as output from
PulseAudio.
[Fix]
Disable IEC958 (SPDIF) through ALSA UCM.
[Test]
With the UCM applied, `pactl` and audio panel in gnome-control-center no
longer have SPDIF option.
[Regression Potential]
Low. This fix limits to the HP Thunderbolt Dock, other devices are unaffected.
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