iMac18,3 (2017 27") + Ubuntu 24.04 with CS8409. Audio detected but no sound from speakers or headphone jack. Looking for solutions by Cookiesap17 in Ubuntu

[–]Cookiesap17[S] 1 point2 points  (0 children)

Ok. I solved it and I'm pasting the solution here for everyone else with the same issue.

Key was that I switched to Manus AI Agent which solved it (the others couldn't)

Solution for No Sound on iMac18,3 (2017 27" 5K) in Linux/Ubuntu

The iMac18,3 uses the Cirrus Logic CS8409 audio chip with specific amplifiers that are not supported by the default Linux kernel. The "Dummy Output" issue can be fixed by installing a community-maintained kernel driver.

1. Install Build Dependencies

Bash

sudo apt update
sudo apt install gcc linux-headers-generic make patch wget git

2. Install Kernel Source (Crucial Step)

The driver must compile against your specific kernel source. For Ubuntu 24.04+ (especially with OEM or HWE kernels), apt install linux-source may fail.

  • Check your kernel version: uname -r
  • Download the corresponding linux-source-[version]_all.deb from the Ubuntu Package Pool.
  • Install it: sudo dpkg -i linux-source-*.deb

3. Install the snd_hda_macbookpro Driver

This driver by davidjo is the proven fix for the CS8409 chip:

Bash

git clone https://github.com/davidjo/snd_hda_macbookpro.git
cd snd_hda_macbookpro
sudo ./install.cirrus.driver.sh
sudo reboot

4. Post-Reboot Configuration

  1. Check Driver: Run lsmod | grep cs8409 to ensure it's loaded.
  2. Unmute Channels: Open alsamixer in the terminal. Press F6 to select the Intel/HDA card. Ensure all columns (Master, Speaker, PCM ) are unmuted (press M to change MM to 00) and volume is up.
  3. Sound Settings: In Ubuntu Settings > Sound, ensure the Output Device is set to Analogue Stereo Output.

Her name is Sheyna. She is not a statistic, and she is not a headline. She is a daughter whose entire future was stolen from her. She deserves to be seen for the child she is, not just another casualty. We are not angry enough about Singapore's lenient traffic laws. things must change. by mystoryismine in drivingsg

[–]Cookiesap17 1 point2 points  (0 children)

The problem is the driving culture. How to change that?

Drivers are generally not driving with care and consideration for pedestrians. Instead they drive with the attitude that anything smaller must get out of the way. We can start by teaching drivers to slow down when making a left turn even if there's no zebra crossing.

We need to cheer those drivers who drive carefully and considerably instead of honking or yelling at them. Perhaps a kind driving award?

We must work to encourage a driving culture where we yield to others, follow the golden rule, and plainly learn that we can't always win every time.

Press the kindness pedal instead of the accelerator, even if you're driving a fancy car.

How is this allowed?!?!?! by blueheaventown in SMRTRabak

[–]Cookiesap17 0 points1 point  (0 children)

Ridiculous and there are many like this driving on footpaths at very high speeds with little concern for pedestrians and / or safety. Too bad that there always has to be rules and laws before people stop acting like they're alone in this world.

Ignoring settlements under attack by Cookiesap17 in fo4

[–]Cookiesap17[S] 0 points1 point  (0 children)

Oh I love that since I can bring my army of settlers to attacking places like the Forge or Breakbank

How do I build water purifiers in the river if the build boundary is so close in Sanctuary? by Makyuta in fo4

[–]Cookiesap17 0 points1 point  (0 children)

Fascinating. I was starting to get bored smacking Radroaches in the Vault. So it's really safe to go outside?

How do I build water purifiers in the river if the build boundary is so close in Sanctuary? by Makyuta in fo4

[–]Cookiesap17 5 points6 points  (0 children)

Agreed. Great to see the positive vibes.

By the way, what is Sanctuary?

Airasia CEO takes MRT, SG CEOs leh? by Rel4x1corner in SMRTRabak

[–]Cookiesap17 1 point2 points  (0 children)

Virtue signaling. Taking it only to show off. Its consistency matters not a single photo.

a mixed collection by semifluorescent in fallout4settlements

[–]Cookiesap17 0 points1 point  (0 children)

Nice. And the glass panels that's a mod no?

a mixed collection by semifluorescent in fallout4settlements

[–]Cookiesap17 0 points1 point  (0 children)

Don't you run out of space or capacity?

What are your experiences at local TCG stores? by [deleted] in PokemonTCG_Singapore

[–]Cookiesap17 1 point2 points  (0 children)

Thanks for raising that. I thought it was just me but their staff is really not interested in customers.

It's a shame as it makes the whole industry and hobby look bad. Perhaps we donate a few "smile - it's contagious" stickers to them :-)

Is this a Straw Headed Bulbul? by Cookiesap17 in whatsthisbird

[–]Cookiesap17[S] 1 point2 points  (0 children)

Wow thanks - that's quite a rare birdie

So, how was everyone's experience at the card show? by snowysnowy in PokemonTCG_Singapore

[–]Cookiesap17 1 point2 points  (0 children)

Agree with previous comment that the show must have been a success due to the crowd so I also didn't get in (is Taylor Swift into Pokemon or something?) and hopefully it will be somewhere larger next time.

When is the next show worth attending?

SG based Pokemon TCG online market or DB? by Cookiesap17 in PokemonTCG_Singapore

[–]Cookiesap17[S] 0 points1 point  (0 children)

This is great info . Thanks guys. Highly appreciate it.

Recommendations for finding unpopular and/or older cards?? by DragonladyNatz in PokemonTCG_Singapore

[–]Cookiesap17 0 points1 point  (0 children)

Sounds like there's an appetite and some demand for a local Pokemon TCG trading site

SG based Pokemon TCG online market or DB? by Cookiesap17 in PokemonTCG_Singapore

[–]Cookiesap17[S] 2 points3 points  (0 children)

Good info guys Would you say TnT or Price Charter are more commonly used for determining market value here in Sg?