Hi Matthew,
Test results follow in the two comments.
[Noble 24.04 LTS — alsa-ucm-conf SRU test]
Hardware: MediaTek MT8391-EVK (Genio 720 EVK)
Tested version:
$ sudo apt-cache policy alsa-ucm-conf | grep Installed
Installed: 1.2.10-1ubuntu5.10
--- Setup ---
Enabled noble-proposed and installed the updated package:
$ sudo apt update
$ sudo apt install alsa-ucm-conf=1.2.10-1ubuntu5.10
--- Test 1: UCM configuration loads ---
$ alsaucm listcards
0: hw:0
mediatek-Genio720520EVKP2V3eMMCBoot-P2V3-Genio720EVKP2V3
Result: PASS
--- Test 2: PipeWire device enumeration ---
Note: A benign kernel message appeared at boot:
[40.330293] HDMI_FE: ASoC: no backend DAIs enabled for HDMI
This is a pre-existing warning unrelated to UCM.
$ wpctl status
PipeWire 'pipewire-0' [1.0.5, ubuntu@ubuntu, cookie:3344994951]
Audio
├─ Devices:
│ 42. Built-in Audio [alsa]
├─ Sinks:
│ 47. Built-in Audio I2S output [vol: 0.40]
│ 48. Built-in Audio PCM output [vol: 0.40]
│ * 49. Built-in Audio Earphone speaker + Lineout speaker [vol: 0.40]
├─ Sources:
│ 50. Built-in Audio I2S input [vol: 1.00]
│ 51. Built-in Audio PCM input [vol: 1.00]
│ * 52. Built-in Audio Digital microphone [vol: 1.00]
│ 53. Built-in Audio Analog microphone + Earphone microphone [vol: 1.00]
Expected sinks present: I2S output ✓, PCM output ✓, Earphone speaker +
Lineout speaker ✓
Expected sources present: I2S input ✓, PCM input ✓, Digital microphone ✓,
Analog microphone + Earphone microphone ✓
Result: PASS
--- Test 3: Audio playback — speakers/headphones ---
Note: The MT8391-EVK has no built-in speaker. Tested with headphones
connected to the earphone combo jack.
$ speaker-test -c 2 -l 1
$ speaker-test -c 1 -l 1
Pink noise audible from both stereo and mono channels.
Result: PASS
--- Test 4: Audio playback — headphones with jack detection ---
Headphones connected to earphone combo jack before running speaker-test.
The "Earphone speaker + Lineout speaker" sink was automatically selected
as default (marked with * in wpctl status), confirming jack detection
and device selection worked correctly.
Result: PASS
--- Test 5: Audio capture ---
Used the onboard digital microphone (default source) for capture.
$ pw-record test.wav
$ pw-play test.wav
Recorded voice was audible on playback.
Result: PASS
--- Test 6: Regression check on non-MT8391 hardware ---
Installed package on an AMD64 office workstation (Ubuntu Noble 24.04,
AMD Ryzen with ALC233 + Webcam C270 audio devices). Previously running
1.2.10-1ubuntu5.9, upgraded to 1.2.10-1ubuntu5.10 from noble-proposed.
$ wpctl status
Audio
├─ Devices:
│ 47. Raven/Raven2/Fenghuang HDMI/DP Audio Controller [alsa]
│ 48. Webcam C270 [alsa]
│ 49. Family 17h/19h HD Audio Controller [alsa]
├─ Sinks:
│ * 53. Family 17h/19h HD Audio Controller Analog Stereo [vol: 0.08]
├─ Sources:
│ * 52. Webcam C270 Mono [vol: 1.00]
│ 54. Family 17h/19h HD Audio Controller Analog Stereo [vol: 1.00]
All pre-existing audio devices present and functional after upgrade.
$ journalctl -b | grep -i ucm | grep -i error
(no output — no UCM errors)
Result: PASS
--- Summary ---
All tests PASSED.
Noble SRU verification complete.
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https://bugs.launchpad.net/bugs/2139651
Title:
[SRU] Add ALSA UCM support for MediaTek MT8391-EVK platform
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