Hi Igor, This worked! Falling back to 6.1.115 and a working internal WiFi... Ernst-Jan

Totally undestand, just I probably know less then you about those things ... mpv is the king, I know that. But most people don't and they will keep asking why VLC, Totem or whatever player doesn't support accelerated video. Every SoC family has its own tricks to get this working ...

@Igor, @robertoj: Update: Friendlyelec image uses its own libav* libraries, not the Debian ones: # ls -1 /usr/local/lib/aarch64-linux-gnu libavcodec.so libavcodec.so.61 libavcodec.so.61.19.101 libavfilter.so libavfilter.so.10 libavfilter.so.10.4.100 libavutil.so libavutil.so.59 libavutil.so.59.39.100 It also has the following packages, not in Armbian: # dpkg -l *mpp* ... ii librockchip-mpp-dev 20260226-2 arm64 Media Process Platform ii librockchip-mpp1 20260226-2 arm64 Media Process Platform ii libv4l-rkmpp 1.8.0-1 arm64 A rockchip-mpp V4L2 wrapper plugin for chromium video dec and enc ii rockchip-mpp-demos 20260226-2 arm64 Media Process Platform Demos I copied the relevant files from Friendlyelec system to Armbian system (both are Trixie), ran ldconfig, and ran `strace mpv my.mp4` on both systems. Comparison of strace output revealed that certain apparently required device files under /dev/dma_heap are missing on Armbian, plus incorrect permissions on /dev/mpp_service: On Friendlyelec: # ls -l /dev/dma_heap total 0 crw-rw-r-- 1 root video 251, 4 Jul 20 06:48 cma crw-rw-r-- 1 root video 251, 5 Jul 20 06:48 cma-uncached crw-rw-r-- 1 root video 251, 0 Jul 20 06:48 system crw-rw-r-- 1 root video 251, 1 Jul 20 06:48 system-dma32 crw-rw-r-- 1 root video 251, 2 Jul 20 06:48 system-uncached crw-rw-r-- 1 root video 251, 3 Jul 20 06:48 system-uncached-dma32 # ls -l /dev/mpp_service crw-rw-rw- 1 root video 241, 0 Jul 20 06:48 /dev/mpp_service On Armbian: # ls -l /dev/dma_heap total 0 crw------- 1 root root 251, 0 Jul 19 19:41 system crw------- 1 root root 251, 1 Jul 19 19:41 system-uncached # ls -l /dev/mpp_service crw------- 1 root root 241, 0 Jul 20 06:48 /dev/mpp_service Removing the cma= arg from the kernel cmdline gave me /dev/dma_heap/cma, and I manually fixed up the permissions, but still no video accel for mpv. Something else is apparently required, perhaps the remaining missing device files under /dev/dma_heap.

@Igor: Update: I have HW accel with sound for chromium with my minimal trixie/vendor image, which I installed xfce on top of. This is the image from armbian.org as opposed to the latest release from Github, which is what I tested in my review of Gnome images above. However Chromium doesn’t support AC3 audio, which means it can’t play the majority of the files in my video collection with sound: https://issues.chromium.org/issues/41253735 And there's a good deal besides that Chromium cannot do. This is why Chromium is not enough and we need mpv/ffmpeg/libav* support. mpv plays literally every media file you can throw at it.

@BipBip1981In your first post you wrote that 6.18.10 works, while 6.18.35 and 6.18.37 don't. Did you test both the new Armbian overlay and the old DTB with 6.18.35, or only one of them? I'm trying to find out whether the DTB makes any difference on 6.18.35.