Ubuntu 21.04 on iMac 19,2 Model - No Sound Output

Paul McKinney

12/15/22, 4:19 PM

I'm really confused as to why no sound is coming out of the speakers or headphones. Ubuntu seems to recognize all of the devices just fine. From the attached images you can see the audio meter is moving while I'm playing music. I've included the settings screen and the alsamixer output. I can't seem to find anything online to even really troubleshoot this. Any troubleshooting suggestions would be helpful.

When I use sudo dmesg | grep -i sound", here is the result I get:

[ 21.484127] input: HDA ATI HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input7 [ 21.484185] input: HDA ATI HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input8 [ 21.484226] input: HDA ATI HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input9 [ 21.484257] input: HDA ATI HDMI HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input10 [ 21.484279] input: HDA ATI HDMI HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input11 [ 21.484319] input: HDA ATI HDMI HDMI/DP,pcm=11 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input12

116

0 + 6

mac

sound

alsa

darth_epoxy

12/16/22, 3:18 AM

Can you please edit your question and add the output of `dmesg | grep -i sound` so we can start to diagnose your problem.

Paul McKinney

12/17/22, 12:32 AM

thanks, I edited it above

Paul McKinney

12/17/22, 12:59 AM

"lspci | grep -i audio" provides the following: 00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10) 01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Baffin HDMI/DP Audio [Radeon RX 550 640SP / RX 560/560X]

darth_epoxy

12/17/22, 5:25 AM

OK so the Cannon Lake is just the name of the integrated chip/card that Intel make specially for Mac. I don't know if ubuntu has the firmware in place, sorry. You can try and search for linux firmware for Cannon Lake or maybe just update your firmware `sudo apt-get install -y linux-firmware` and let us know your progress.

Paul McKinney

1/2/23, 2:48 PM

From my research, it looks like this will be fixed in a newer kernel. This web site gives me some clue (https://h-node.org/soundcards/view/en/2157/Intel-Corporation-Cannon-Lake-PCH-cAVS--rev-10-/1/1/undef/undef/undef/undef/sound-card-works/undef). Other sites have indicated issues with the iMac 19,2 sound card.

darth_epoxy

1/3/23, 8:26 AM

If you are in the know (I am definitely NOT) then you can extract the firmware from your Mac if you are still dual booting. Here is an example of people that have done this for other firmware & drivers https://packages.aunali1.com/apple/wifi-fw/18G2022/ so you could search within that community.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Ubuntu 21.04 on iMac 19,2 Model - No Sound Output

TH: Ubuntu 21.04 บนรุ่น iMac 19,2 - ไม่มีเอาต์พุตเสียง

RO: Ubuntu 21.04 pe modelul iMac 19,2 - Fără ieșire de sunet

RU: Ubuntu 21.04 на модели iMac 19,2 — нет звука

VI: Ubuntu 21.04 trên iMac 19,2 Model - Không có đầu ra âm thanh

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.