Fedora 40 sound not working and display brightness slider is missing

[peters (Peter Smith)]

Recently the sound on this Fedora 40 laptop has stopped working, and the display brightness slider in Gnome is gone. This Fedora 40 is an upgrade of Fedora 39. Immediately after the upgrade the sound and the brightness sliders were working OK. I think a recent update might have broken these.

The following issues are similar but do not provide me with any fix:

F40 regression? Internal audio output device not found

I just updated my existing Fedora 39 installation to Fedora 40 beta. Since the update, GNOME does not show any audio output devices. The internal microphone works fine however, gnome sound recorder shows realistic graphs when changing input volume. I’ve already tried booting into the old kernel (6.7.9-200.fc39.x86_64 instead of 6.8.1-300.fc40.x86_64), but that did not help, i.e., the F39 kernel behaves the same as F40 kernel. By accident, when trying to connect an external audio output device …

Audio device output issues, bluetooth issues after updating to Fedora 40

What kernel version are you on? Please post the output of : rpm -qa | grep kernel-core also please provide the output of : inxi -Fzxx There are some Bluetooth related commands, if you can reliably reproduce the issue try to capture this immediately after you wake from suspend : dmesg | grep bluetooth Also : journalctl | grep bluetooth

Additional details per those threads:

root@fedora:~# pactl list cards
Connection failure: Connection refused
pa_context_connect() failed: Connection refused
root@fedora:~# 

root@fedora:~# rpm -qa | grep kernel-core
kernel-core-6.8.9-200.fc39.x86_64
kernel-core-6.8.9-300.fc40.x86_64
kernel-core-6.8.10-300.fc40.x86_64
root@fedora:~# 

root@fedora:~# inxi -Fzxx
System:
  Kernel: 6.8.10-300.fc40.x86_64 arch: x86_64 bits: 64 compiler: gcc
    v: 2.41-37.fc40
  Console: pty pts/1 wm: gnome-shell DM: GDM Distro: Fedora Linux 40
    (Workstation Edition)
Machine:
  Type: Laptop System: Dell product: Precision 3561 v: N/A serial: <filter>
    Chassis: type: 10 serial: <filter>
  Mobo: Dell model: 03T624 v: A00 serial: <filter> part-nu: 0A68 UEFI: Dell
    v: 1.29.0 date: 01/31/2024
Battery:
  ID-1: BAT0 charge: 42.9 Wh (100.0%) condition: 42.9/64.0 Wh (67.0%)
    volts: 16.8 min: 15.2 model: BYD DELL R05P014 serial: <filter> status: full
CPU:
  Info: 8-core model: 11th Gen Intel Core i7-11850H bits: 64 type: MT MCP
    arch: Tiger Lake rev: 1 cache: L1: 640 KiB L2: 10 MiB L3: 24 MiB
  Speed (MHz): avg: 1096 high: 1600 min/max: 800/4800 cores: 1: 1600 2: 800
    3: 1600 4: 800 5: 800 6: 1573 7: 800 8: 800 9: 800 10: 800 11: 1575 12: 800
    13: 800 14: 1600 15: 1591 16: 800 bogomips: 79872
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: Intel TigerLake-H GT1 [UHD Graphics] vendor: Dell driver: N/A
    arch: Gen-12.1 bus-ID: 0000:00:02.0 chip-ID: 8086:9a60
  Device-2: NVIDIA TU117GLM [T1200 Laptop GPU] vendor: Dell driver: nvidia
    v: 550.78 arch: Turing bus-ID: 0000:01:00.0 chip-ID: 10de:1fbc
  Display: server: X.Org v: 1.20.14 with: Xwayland v: 24.1.0
    compositor: gnome-shell driver: X: loaded: modesetting,nouveau,nvidia,vesa
    unloaded: fbdev alternate: nv dri: swrast gpu: nvidia display-ID: :0
    screens: 1
  Screen-1: 0 s-res: 1366x768 s-dpi: 96
  Monitor-1: Unknown-1 mapped: None-1 res: 1366x768 size: N/A
  API: OpenGL v: 4.5 vendor: mesa v: 24.0.8 glx-v: 1.4 es-v: 3.2
    direct-render: yes renderer: llvmpipe (LLVM 18.1.1 256 bits)
    device-ID: ffffffff:ffffffff
  API: Vulkan v: 1.3.280 surfaces: xcb,xlib device: 0 type: discrete-gpu
    driver: N/A device-ID: 10de:1fbc device: 1 type: cpu driver: N/A
    device-ID: 10005:0000
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
Audio:
  Device-1: Intel Tiger Lake-H HD Audio vendor: Dell driver: N/A
    bus-ID: 0000:00:1f.3 chip-ID: 8086:43c8
  API: ALSA v: k6.8.10-300.fc40.x86_64 status: kernel-api
  Server-1: PipeWire v: 1.0.7 status: n/a (root, process) with:
    1: pipewire-pulse status: active 2: wireplumber status: active
    3: pipewire-alsa type: plugin 4: pw-jack type: plugin
Network:
  Device-1: Intel Tiger Lake PCH CNVi WiFi driver: iwlwifi v: kernel
    bus-ID: 0000:00:14.3 chip-ID: 8086:43f0
  IF: wlp0s20f3 state: up mac: <filter>
  Device-2: Intel Ethernet I219-LM driver: e1000e v: kernel port: N/A
    bus-ID: 0000:00:1f.6 chip-ID: 8086:15f9
  IF: enp0s31f6 state: down mac: <filter>
  Device-3: Realtek RTL8153 Gigabit Ethernet Adapter driver: r8152 type: USB
    rev: 3.2 speed: 5 Gb/s lanes: 1 bus-ID: 2-2.4:4 chip-ID: 0bda:8153
  IF: enp0s13f0u2u4 state: up speed: 1000 Mbps duplex: full mac: <filter>
RAID:
  Hardware-1: Intel Volume Management Device NVMe RAID Controller driver: vmd
    v: 0.6 bus-ID: 0000:00:0e.0 chip-ID: 8086:9a0b
Drives:
  Local Storage: total: 238.47 GiB used: 183.77 GiB (77.1%)
  ID-1: /dev/nvme0n1 vendor: Western Digital model: PC SN530 NVMe WDC 256GB
    size: 238.47 GiB speed: 31.6 Gb/s lanes: 4 serial: <filter> temp: 43.9 C
Partition:
  ID-1: / size: 236.87 GiB used: 183.13 GiB (77.3%) fs: btrfs dev: /dev/dm-0
    mapped: luks-098fa41d-d505-437c-8091-4e26989a6066
  ID-2: /boot size: 973.4 MiB used: 591.5 MiB (60.8%) fs: ext4
    dev: /dev/nvme0n1p2
  ID-3: /boot/efi size: 598.8 MiB used: 62.7 MiB (10.5%) fs: vfat
    dev: /dev/nvme0n1p1
  ID-4: /home size: 236.87 GiB used: 183.13 GiB (77.3%) fs: btrfs
    dev: /dev/dm-0 mapped: luks-098fa41d-d505-437c-8091-4e26989a6066
Swap:
  ID-1: swap-1 type: zram size: 8 GiB used: 0 KiB (0.0%) priority: 100
    dev: /dev/zram0
Sensors:
  Src: /sys System Temperatures: cpu: 59.0 C mobo: 54.0 C
  Fan Speeds (rpm): cpu: 1556
  Power: 12v: N/A 5v: 5 3.3v: N/A vbat: N/A
Info:
  Memory: total: 16 GiB note: est. available: 15.34 GiB used: 6.09 GiB (39.7%)
  Processes: 487 Power: uptime: 10m wakeups: 0 Init: systemd v: 255
    target: graphical (5) default: graphical
  Packages: pm: flatpak pkgs: 24 Compilers: gcc: 14.1.1 Shell: Bash
    v: 5.2.26 running-in: gnome-terminal inxi: 3.3.34
root@fedora:~# 

Note that booting from a Fedora 40 Live USB shows that sound works OK and the display brightness slider is there.

[peters (Peter Smith)]

Gnome Settings / Sound from Fedora 40 Workstation Live USB

Gnome Settings/ Sound from current Fedora 40

Gnome taskbar tray showing display brightness slider from Fedora 40 Workstation Live USB

Gnome taskbar tray showing missing display brightness slider from Fedora 40

[gnwiii (George N. White III)]

Please rule out potential issues with Gnome extensions or other user settings by creating a new user login and checking to see if the problem appears.

[peters (Peter Smith)]

I found the issue, however I still wonder what “the correct solution” is.

Within the past 2 weeks I’d added the following Kernel CMDLINE entries (file:/etc/default/grub setting:GRUB_CMDLINE_LINUX) while working around issues with Lutris and trying to get a specific Windows game to work on this laptop:

modprobe.blacklist=i915 acpi_backlight=nvidia_wmi_ec

After removing those 2 entries, regenerating my grub.cfg, and rebooting, the sound and the display brightness slider are both working again.

I guess I will have to find a different solution to my Lutris issue.