Public bug reported:
After updating Ubuntu 20.04 LTS with the latest kernel, sound stops working and
the settings panel only shows "Dummy" sound.
Selecting 5.8 kernels in Grub2 gets the sound working again.
Output of lsb_release -rd
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Output of apt-cache policy linux-image-5.11*generic
linux-image-5.11.0-22-generic:
Installed: 5.11.0-22.23~20.04.1
Candidate: 5.11.0-22.23~20.04.1
Version table:
*** 5.11.0-22.23~20.04.1 500
500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
100 /var/lib/dpkg/status
What I expected to happen:
Everything should continue working after a routine system upgrade, including a
new kernel version.
What happened:
After a normal system update, which included the new kernel version 5.11, sound
stopped working and device disappeared from settings.
Additional info:
$ sudo lspci -vv |grep -i audio
00:1b.0 Audio device: Intel Corporation 7 Series/C216 Chipset Family High
Definition Audio Controller (rev 04)
DeviceName: Intel High Definition Audio Device
Subsystem: Intel Corporation 7 Series/C216 Chipset Family High
Definition Audio Controller
01:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev a1)
Subsystem: eVga.com. Corp. GK104 HDMI Audio Controller
pcilib: sysfs_read_vpd: read failed: Input/output error
$ sudo dmesg | grep -i audio
[ 0.244893] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
** Affects: linux-hwe-5.11 (Ubuntu)
Importance: Undecided
Status: New
** Tags: kernel-bug sound
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https://bugs.launchpad.net/bugs/1933723
Title:
No sound on Ubuntu 20.04 LTS with kernel 5.11.0
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