Hello, good evening. I'll check again tomorrow; I don't remember which version of Armbian I have installed, but the microphone works without any problems in Armbian. I simply installed the Armbian version and didn't have to modify anything.

From your logs: Healthy: 6.12.32-current-meson64 Unhealthy: 6.18.15-current-meson64 Certainly sounds like something changed/broke in a major kernel update? For the near term, I would grab a copy of the 6.12 kernel and keep a copy. The apt tool should have saved a copy in /var/cache/apt/archives, so you should be able to pull a copy from the good system, and use "sudo dpkg -i" to downgrade the other two boards for the time being. If the working node has been upgraded, it's fan will probably stop working as intended after a power cycle. In parallel, the next thing to do is to take a look at the .dtb files for both kernels (amlogic/meson-sm1-odroid-hc4.dtb), and see what's changed. If I have a free evening, I'll take a peek. As @Igor as the board maintainer, you can also file a bug at https://github.com/armbian/build/issues, but could be a bit to get addressed.

I ran Geekbench on the A7S with all the clocks at maximum. Here are the results: https://browser.geekbench.com/v5/cpu/24253556 https://browser.geekbench.com/v6/cpu/17727869 And your script gives me: ╔══════════════════════════════════════════════════╗ ║ CPU Performance Benchmark Tool v1.0 ║ ║ Single · Multi-Core · Big/LITTLE Benchmark ║ ║ Auto-detects heterogeneous cores ║ ╚══════════════════════════════════════════════════╝ ════════════════════════════════════════════════════════════ System Info ════════════════════════════════════════════════════════════ OS: Linux 6.6.98-vendor-sun60iw2 (aarch64) Processor: aarch64 Logical cores: 8 Core topology: 8 cores [homogeneous / unprobed] Python: 3.13.5 (CPython) Test time: 2026-04-21 00:46:32 Single-core 5s/test | Per-core 3rounds x 3s | 8 dimensions ════════════════════════════════════════════════════════════ Single Core Benchmark (Fastest Core) ════════════════════════════════════════════════════════════ [1/8] Integer (Prime Sieve) ... 4637 iters / 5.00s (927.39 ops/s) [2/8] Float (Matrix Mul) ... 7 iters / 5.12s (1.37 ops/s) [3/8] Float (FFT) ... 3 iters / 7.05s (0.43 ops/s) [4/8] Hash (SHA-256) ... 114 iters / 5.02s (22.70 ops/s) [5/8] Memory Sort ... 4 iters / 6.56s (0.61 ops/s) [6/8] Recursion (Fibonacci) ... 1 iters / 11.63s (0.09 ops/s) [7/8] Math (Pi) ... 1852 iters / 5.00s (370.35 ops/s) [8/8] Compress (zlib) ... 25 iters / 5.14s (4.86 ops/s) ════════════════════════════════════════════════════════════ Per-Core Power Probe (8 logical cores) ════════════════════════════════════════════════════════════ System reports no heterogeneous topology, probing empirically 3 rounds x 3s/round, warmup 0.5s, pinned mode, 8 workers Probing Integer (3 rounds): Round 1/3 ... max 923.9 min 277.1 ratio 3.33x pinned Round 2/3 ... max 922.6 min 275.2 ratio 3.35x pinned Round 3/3 ... max 921.8 min 273.9 ratio 3.37x pinned Median results (3 rounds): Core 6: 922.63 ops/s [████████████████████] 100.0% Core 7: 916.12 ops/s [███████████████████░] 99.3% Core 4: 276.21 ops/s [█████░░░░░░░░░░░░░░░] 29.9% Core 1: 276.10 ops/s [█████░░░░░░░░░░░░░░░] 29.9% Core 3: 276.04 ops/s [█████░░░░░░░░░░░░░░░] 29.9% Core 5: 275.76 ops/s [█████░░░░░░░░░░░░░░░] 29.9% Core 2: 275.56 ops/s [█████░░░░░░░░░░░░░░░] 29.9% Core 0: 275.17 ops/s [█████░░░░░░░░░░░░░░░] 29.8% -> Heterogeneity detected: 2 big cores (avg 919.4 ops/s) + 6 little cores (avg 275.8 ops/s) ratio 3.33x Probing Float (3 rounds): Round 1/3 ... max 370.4 min 95.4 ratio 3.88x pinned Round 2/3 ... max 371.1 min 95.4 ratio 3.89x pinned Round 3/3 ... max 369.5 min 95.3 ratio 3.88x pinned Median results (3 rounds): Core 6: 370.39 ops/s [████████████████████] 100.0% Core 7: 369.28 ops/s [███████████████████░] 99.7% Core 5: 95.59 ops/s [█████░░░░░░░░░░░░░░░] 25.8% Core 4: 95.51 ops/s [█████░░░░░░░░░░░░░░░] 25.8% Core 1: 95.46 ops/s [█████░░░░░░░░░░░░░░░] 25.8% Core 3: 95.46 ops/s [█████░░░░░░░░░░░░░░░] 25.8% Core 2: 95.45 ops/s [█████░░░░░░░░░░░░░░░] 25.8% Core 0: 95.36 ops/s [█████░░░░░░░░░░░░░░░] 25.7% -> Heterogeneity detected: 2 big cores (avg 369.8 ops/s) + 6 little cores (avg 95.5 ops/s) ratio 3.87x Multi-benchmark cross-validation agrees: 2 big + 6 little System didn't report heterogeneous, but probe found 2 big + 6 little (ratio 3.58x) ════════════════════════════════════════════════════════════ Big/Little Independent Benchmark (2 big + 6 little) ════════════════════════════════════════════════════════════ Three phases: big(2 threads) / little(6 threads) / mixed(8 threads) [1/8] Integer (Prime Sieve) Big ( 2 threads): iters 3637 | throughput 1818.20 ops/s | per-core min/avg/max: 907.88/909.10/910.33 Little ( 6 threads): iters 5881 | throughput 2939.47 ops/s | per-core min/avg/max: 275.72/489.91/924.17 Mixed ( 8 threads): iters 6989 | throughput 3492.59 ops/s | per-core min/avg/max: 275.81/436.57/919.04 Speedup: big 1.97x little 3.18x mixed 3.78x Efficiency: big 98.4% little 53.0% mixed 47.3% Big per-core min/avg/max: 907.88/909.10/910.33 ops/s Little per-core min/avg/max: 275.72/489.91/924.17 ops/s Mixed per-core min/avg/max: 275.81/436.57/919.04 ops/s [2/8] Float (Matrix Mul) Big ( 2 threads): iters 4 | throughput 1.14 ops/s | per-core min/avg/max: 0.57/0.57/0.57 Little ( 6 threads): iters 8 | throughput 1.95 ops/s | per-core min/avg/max: 0.23/0.32/0.51 Mixed ( 8 threads): iters 8 | throughput 2.59 ops/s | per-core min/avg/max: 0.24/0.32/0.48 Speedup: big 1.48x little 2.54x mixed 3.37x Efficiency: big 74.2% little 42.3% mixed 42.1% Big per-core min/avg/max: 0.57/0.57/0.57 ops/s Little per-core min/avg/max: 0.23/0.32/0.51 ops/s Mixed per-core min/avg/max: 0.24/0.32/0.48 ops/s [3/8] Float (FFT) Big ( 2 threads): iters 2 | throughput 0.74 ops/s | per-core min/avg/max: 0.37/0.37/0.37 Little ( 6 threads): iters 6 | throughput 1.51 ops/s | per-core min/avg/max: 0.18/0.25/0.36 Mixed ( 8 threads): iters 8 | throughput 1.79 ops/s | per-core min/avg/max: 0.16/0.22/0.35 Speedup: big 1.93x little 3.93x mixed 4.65x Efficiency: big 96.3% little 65.4% mixed 58.1% Big per-core min/avg/max: 0.37/0.37/0.37 ops/s Little per-core min/avg/max: 0.18/0.25/0.36 ops/s Mixed per-core min/avg/max: 0.16/0.22/0.35 ops/s [4/8] Hash (SHA-256) Big ( 2 threads): iters 90 | throughput 44.91 ops/s | per-core min/avg/max: 22.44/22.45/22.47 Little ( 6 threads): iters 192 | throughput 93.90 ops/s | per-core min/avg/max: 12.15/15.65/22.60 Mixed ( 8 threads): iters 241 | throughput 117.73 ops/s | per-core min/avg/max: 12.10/14.72/22.54 Speedup: big 1.98x little 4.14x mixed 5.19x Efficiency: big 99.0% little 69.0% mixed 64.9% Big per-core min/avg/max: 22.44/22.45/22.47 ops/s Little per-core min/avg/max: 12.15/15.65/22.60 ops/s Mixed per-core min/avg/max: 12.10/14.72/22.54 ops/s [5/8] Memory Sort Big ( 2 threads): iters 4 | throughput 1.06 ops/s | per-core min/avg/max: 0.53/0.53/0.53 Little ( 6 threads): iters 6 | throughput 2.01 ops/s | per-core min/avg/max: 0.23/0.33/0.49 Mixed ( 8 threads): iters 8 | throughput 2.28 ops/s | per-core min/avg/max: 0.19/0.29/0.47 Speedup: big 1.78x little 3.37x mixed 3.83x Efficiency: big 89.1% little 56.2% mixed 47.9% Big per-core min/avg/max: 0.53/0.53/0.53 ops/s Little per-core min/avg/max: 0.23/0.33/0.49 ops/s Mixed per-core min/avg/max: 0.19/0.29/0.47 ops/s [6/8] Recursion (Fibonacci) Big ( 2 threads): iters 2 | throughput 0.17 ops/s | per-core min/avg/max: 0.08/0.08/0.09 Little ( 6 threads): iters 6 | throughput 0.36 ops/s | per-core min/avg/max: 0.04/0.06/0.08 Mixed ( 8 threads): iters 8 | throughput 0.43 ops/s | per-core min/avg/max: 0.04/0.05/0.08 Speedup: big 2.00x little 4.20x mixed 5.07x Efficiency: big 100.0% little 70.1% mixed 63.4% Big per-core min/avg/max: 0.08/0.08/0.09 ops/s Little per-core min/avg/max: 0.04/0.06/0.08 ops/s Mixed per-core min/avg/max: 0.04/0.05/0.08 ops/s [7/8] Math (Pi) Big ( 2 threads): iters 1492 | throughput 745.39 ops/s | per-core min/avg/max: 370.74/372.70/374.65 Little ( 6 threads): iters 2263 | throughput 1130.50 ops/s | per-core min/avg/max: 94.95/188.42/375.07 Mixed ( 8 threads): iters 2642 | throughput 1319.41 ops/s | per-core min/avg/max: 95.16/164.93/374.73 Speedup: big 2.03x little 3.07x mixed 3.58x Efficiency: big 101.3% little 51.2% mixed 44.8% Big per-core min/avg/max: 370.74/372.70/374.65 ops/s Little per-core min/avg/max: 94.95/188.42/375.07 ops/s Mixed per-core min/avg/max: 95.16/164.93/374.73 ops/s [8/8] Compress (zlib) Big ( 2 threads): iters 20 | throughput 9.51 ops/s | per-core min/avg/max: 4.73/4.75/4.78 Little ( 6 threads): iters 40 | throughput 18.53 ops/s | per-core min/avg/max: 2.21/3.09/4.78 Mixed ( 8 threads): iters 50 | throughput 22.02 ops/s | per-core min/avg/max: 2.09/2.75/4.62 Speedup: big 1.96x little 3.81x mixed 4.53x Efficiency: big 97.8% little 63.5% mixed 56.6% Big per-core min/avg/max: 4.73/4.75/4.78 ops/s Little per-core min/avg/max: 2.21/3.09/4.78 ops/s Mixed per-core min/avg/max: 2.09/2.75/4.62 ops/s ════════════════════════════════════════════════════════════ Score Report (Heterogeneous: 2 big + 6 little) ════════════════════════════════════════════════════════════ Test Single Big Little Mixed Big eff Little eff ──────────────────────────────────────────────────────────────────────────────── Integer (Prime Sieve) 11592 22728 36743 43657 98.4% 53.0% Float (Matrix Mul) 2733 2282 3899 5183 74.2% 42.3% Float (FFT) 142 247 503 596 96.3% 65.4% Hash (SHA-256) 1514 2994 6260 7849 99.0% 69.0% Memory Sort 203 354 670 761 89.1% 56.2% Recursion (Fibonacci) 29 57 119 144 100.0% 70.1% Math (Pi) 1852 3727 5652 6597 101.3% 51.2% Compress (zlib) 972 1901 3705 4405 97.8% 63.5% ──────────────────────────────────────────────────────────────────────────────── Single geomean.................... 719 Big group geomean................. 1236 Little group geomean.............. 2289 Mixed geomean..................... 2760 ════════════════════════════════════════════════════════════ Big/Little Power Comparison ════════════════════════════════════════════════════════════ Big/Little power ratio (from per-core probe): 3.58x Big avg ops/s: 1.99 Little avg ops/s: 0.56 Power composition: Big (2 cores): [████████████████░░░░░░░░░░░░░░] 54.4% 54.4% Little (6 cores): [█████████████░░░░░░░░░░░░░░░░░] 45.6% 45.6% Equivalent big cores: 3.7 (little cores converted to big power) ══════════════════════════════════════════════════ Single score: 719 (fastest core) Big group score: 1236 (big cores only) Little group score: 2289 (little cores only) Mixed score: 2760 (big+little mixed) Mixed / Single: 3.84x ══════════════════════════════════════════════════ Benchmark complete!

@BacchusIX Odroid H4 Plus

@Sponzo that image also doesnt work for me, did you have to unlock to bootloader or something else in dev settings?