how to have sound from the monitor?

centguy · 12-10-2021, 07:42 AM

I have a new PRISM+ monitor that comes with a speaker.

I cannot play music on CentOS7 but OK on Rocky 8.

Under Settings -> Sound, CentOS7 shows only 1 entry, which is
Headphones Built in Audio

But Rocky Linux 8, there are two entries. I think one is
Headphones Built in Audio
and the other is
HDMI/Audio or something (cannot remember exactly).

The lspci output on CentOS 7 and Rocky Linux 8 are as below.
Question: What is missing on CentOS 7?

On CentOS 7:

Quote:

00:00.0 Host bridge: Intel Corporation Device 9b43 (rev 05)
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>

00:02.0 VGA compatible controller: Intel Corporation Device 9bc5 (rev 05) (prog-if 00 [VGA controller])
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0, IRQ 255
Memory at d0000000 (64-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 4000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
Subsystem: Dell Device 09b4
Flags: fast devsel, IRQ 255
Memory at d132f000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>

00:14.0 USB controller: Intel Corporation Device a3af (prog-if 30 [XHCI])
Subsystem: Dell Device 09b4
Flags: bus master, medium devsel, latency 0, IRQ 125
Memory at d1310000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd

00:14.2 Signal processing controller: Intel Corporation Device a3b1
Subsystem: Dell Device 09b4
Flags: fast devsel, IRQ 255
Memory at d132e000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>

00:16.0 Communication controller: Intel Corporation Device a3ba
Subsystem: Dell Device 09b4
Flags: fast devsel, IRQ 255
Memory at d132d000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>

00:17.0 SATA controller: Intel Corporation Device a382 (prog-if 01 [AHCI 1.0])
Subsystem: Dell Device 09b4
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 128
Memory at d1328000 (32-bit, non-prefetchable) [size=8K]
Memory at d132c000 (32-bit, non-prefetchable) [size=256]
I/O ports at 4090 [size=8]
I/O ports at 4080 [size=4]
I/O ports at 4060 [size=32]
Memory at d132b000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci

00:1c.0 PCI bridge: Intel Corporation Device a394 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 122
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: d1200000-d12fffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1c.5 PCI bridge: Intel Corporation Device a395 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Memory behind bridge: d1100000-d11fffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1c.7 PCI bridge: Intel Corporation Device a397 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 124
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Memory behind bridge: d1000000-d10fffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1f.0 ISA bridge: Intel Corporation Device a3c8
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0

00:1f.2 Memory controller: Intel Corporation Device a3a1
Subsystem: Dell Device 09b4
Flags: fast devsel
Memory at d1324000 (32-bit, non-prefetchable) [disabled] [size=16K]

00:1f.3 Audio device: Intel Corporation Device a3f0
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 32, IRQ 130
Memory at d1320000 (64-bit, non-prefetchable) [size=16K]
Memory at d1300000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:1f.4 SMBus: Intel Corporation Device a3a3
Subsystem: Dell Device 09b4
Flags: medium devsel, IRQ 255
Memory at d132a000 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0, IRQ 16
I/O ports at 3000 [size=256]
Memory at d1204000 (64-bit, non-prefetchable) [size=4K]
Memory at d1200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169

02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader
Flags: bus master, fast devsel, latency 0, IRQ 126
Memory at d1100000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pci

03:00.0 Network controller: Intel Corporation Wireless 3165 (rev 79)
Subsystem: Intel Corporation Device 4410
Flags: bus master, fast devsel, latency 0, IRQ 129
Memory at d1000000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi

On Rocky Linux 8:

Quote:

00:00.0 Host bridge: Intel Corporation Device 9b43 (rev 05)
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: skl_uncore

00:02.0 VGA compatible controller: Intel Corporation CometLake-S GT2 [UHD Graphics 630] (rev 05) (prog-if 00 [VGA controller])
DeviceName: Onboard - Video
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0, IRQ 129
Memory at d0000000 (64-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 4000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: fast devsel, IRQ 255
Memory at d132f000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>

00:14.0 USB controller: Intel Corporation Comet Lake PCH-V USB Controller (prog-if 30 [XHCI])
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: bus master, medium devsel, latency 0, IRQ 125
Memory at d1310000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd

00:14.2 Signal processing controller: Intel Corporation Comet Lake PCH-V Thermal Subsystem
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: fast devsel, IRQ 255
Memory at d132e000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: <access denied>

00:16.0 Communication controller: Intel Corporation Device a3ba
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0, IRQ 130
Memory at d132d000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: mei_me
Kernel modules: mei_me

00:17.0 SATA controller: Intel Corporation 400 Series Chipset Family SATA AHCI Controller (prog-if 01 [AHCI 1.0])
DeviceName: Onboard - SATA
Subsystem: Dell Device 09b4
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 127
Memory at d1328000 (32-bit, non-prefetchable) [size=8K]
Memory at d132c000 (32-bit, non-prefetchable) [size=256]
I/O ports at 4090 [size=8]
I/O ports at 4080 [size=4]
I/O ports at 4060 [size=32]
Memory at d132b000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci

00:1c.0 PCI bridge: Intel Corporation Device a394 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 122
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00003000-00003fff [size=4K]
Memory behind bridge: d1200000-d12fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1c.5 PCI bridge: Intel Corporation Device a395 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: d1100000-d11fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1c.7 PCI bridge: Intel Corporation Device a397 (rev f0) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 124
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: d1000000-d10fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1f.0 ISA bridge: Intel Corporation Device a3c8
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0

00:1f.2 Memory controller: Intel Corporation Memory controller
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: fast devsel
Memory at d1324000 (32-bit, non-prefetchable) [disabled] [size=16K]

00:1f.3 Audio device: Intel Corporation Device a3f0
DeviceName: Onboard - Sound
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 32, IRQ 132
Memory at d1320000 (64-bit, non-prefetchable) [size=16K]
Memory at d1300000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_sof_pci_intel_cnl

00:1f.4 SMBus: Intel Corporation Comet Lake PCH-V SMBus Host Controller
DeviceName: Onboard - Other
Subsystem: Dell Device 09b4
Flags: medium devsel, IRQ 255
Memory at d132a000 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
Subsystem: Dell Device 09b4
Flags: bus master, fast devsel, latency 0, IRQ 16
I/O ports at 3000 [size=256]
Memory at d1204000 (64-bit, non-prefetchable) [size=4K]
Memory at d1200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169

02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader
Flags: bus master, fast devsel, latency 0, IRQ 126
Memory at d1100000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pci

03:00.0 Network controller: Intel Corporation Wireless 3165 (rev 79)
Subsystem: Intel Corporation Device 4410
Flags: bus master, fast devsel, latency 0, IRQ 131
Memory at d1000000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi

centguy · 12-10-2021, 07:50 AM

I diff the audio part: Rocky Linux 8 has snd_sof_pci_intel_cnl

Could it be the reason?

> DeviceName: Onboard - Sound
3c4
< Flags: bus master, fast devsel, latency 32, IRQ 130
---
> Flags: bus master, fast devsel, latency 32, IRQ 132
8,9c9
< Kernel modules: snd_hda_intel
<
---
> Kernel modules: snd_hda_intel, snd_sof_pci_intel_cnl

centguy · 12-10-2021, 07:56 AM

This should be my last post. I want to switch to Rocky Linux 8, but the Check Point VPN does not work there. urgh..

centguy · 12-10-2021, 08:53 AM

Simply put, the HDMI cable is supposed to transfer the audio output to the speaker in the monitor but somehow CentOS 7 cannot handle it. Well, may be it is too old
for this kind of stuff. Rocky Linux 8, Debian 11, Ubuntu 20.04 all work fine. I think I can still live without the audio. If I really want, I just plug in the headset.

aus9 · 12-10-2021, 06:23 PM

If its only the kernel module that is not enabling hdmi you have a couple of choices.

1) compile your own kernel from vanila kernel from https://www.kernel.org/

2) as that can be time comsuming you could try a liquorix kernel (originally designed for debian systems) but there is project that might work for you here
https://copr.fedorainfracloud.org/co...ce/kernel-lqx/

I run debian and have never run centos or centos based distros so YMMV

Brains · 12-12-2021, 05:17 AM

CentOS puts very little to no effort in multimedia development/support. It is Red Hat OS's flagship development OS, Red Hat is designed for business, not gaming.
Hardware support is mostly developed through Fedora as far as I'm concerned, CentOS is more focused on software and networking hardware etc. the type of hardware home users don't use.

centguy · 12-17-2021, 01:47 AM

For me, CentOS is not shiny, but it is mostly functional in most parts (if by chance it works). After all, it is an improved version of a slightly older Fedora.
E.g., the new thing like Adwaita-dark mode seems cool, but I have to change back to the default mode since I cannot see the output clearly in the difference in the meld program
due to the color coding (do not even want to fight this war). Well, we learn to make compromises in life.