https://askubuntu.com/questions/1371732/what-is-the-purpose-of-cgroup-enable-cpuset-cgroup-enable-memory-cgroup-memory-1 Without further research the answer here mentions that the flags in question may be specific for RaspberryPi, hence won't work on other kernels/boards.

All images are specifically made for the board. Some share the same kernel package since they are from the same soc family (for example, there are a lot of boards using the rk3588/s soc so they can have the same kernel package. Board's components are defined in device tree). Sample board config: https://github.com/armbian/build/blob/main/config/boards/orangepi5pro.csc BOARD_FAMILY is rockchip-r3588 The sources config: https://github.com/armbian/build/blob/main/config/sources/families/rockchip-rk3588.conf Pro, max and ultra are community contributions and for now entirely unsupported since there is also no support from the vendor for us for these whatsoever to make its software better.

Hi there, Some notes from my side, with the image we are now both trying out, I do have some issues every other boot. Seems that the kernel gets stuck at: [ 19.941334] amba ff6d0000.dma-controller: deferred probe pending: (reason unknown) [ 19.942069] amba ff6e0000.dma-controller: deferred probe pending: (reason unknown) [ 19.942765] platform ff1d0000.spi: deferred probe pending: (reason unknown) [ 19.943404] platform ff1e0000.spi: deferred probe pending: (reason unknown) [ 19.944042] platform ff200000.spi: deferred probe pending: (reason unknown) No idea why. This seems to alternate every other boot, so after a reboot this appears to be tolerated, but the next reboot the kernel gets stuck again. And stuck in like magic sysrq stops working. Make sure you have verbosity=8 in your armbianEnv.txt, to make sure some (read: more) output is generated on the console. Groetjes,

Right to clarify what I described earlier was the patch creation process, where you would modify an existing file or if the file does not exist you would create in the relevant. After running for a bit the build process will pause. At this point you would need to open a new tab and navigate to cache/sources/linux-kernel-worktree/6.12__sunxi__armhf/arch/arm/boot/dts/allwinner. Here you would need to amend the sun4i-a10-topwise-a721.dts. According to the dts it already has the panel node so the on board display should at least work unless the driver is broken or device tree bindings have changed. Unfortunately I havent worked with panels so cannot provide much further assistance for other than confirming that an entry exist in the simple panel driver. sudo modinfo panel-simple | grep starry [sudo] password for ryan: alias: of:N*T*Cstarry,kr070pe2tC* alias: of:N*T*Cstarry,kr070pe2t ryan@pcduino2-1:~$ Normally to get hdmi to work you simply have to enable the hdmi nodes plus create a hdmi connector node. I have attached the patch that I use on my pcduino2, applying the same alterations to the dts of the topwise's dts should work. I have had issues with hdmi display in 6.12 which I found a work around for but not perfect as we have to modify the hdmi driver. From What I can tell the problem is related to atomic check function: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20241130-hdmi-mode-valid-v5-10-742644ec3b1f@linaro.org/ It may be fixed in kernel 6.14 but I havent tested it yet. save the changes in your text editor and exit. Return to the tab running the build script, hit enter and it will generate a preview of the changes and ask if you are happy with the changes or not. type 'y' to accept. Luckily the build process will helpfully walk you through these steps. Once the build process has finished go to output/patch/. and rename the newly generated patch something useful so that you remember its purpose. Then move it into patches or userpatches. Which is up to you but personally, I prefer to have my patches in userpatches unless it is something I plan to merge in future. whenever you run git pull to fetch the latest version of armbian build, the patch directory is likely to be updated whereas userpatches is not affected. A caveat with userpatches is that full directory structure is not pre-existing so you have to manually create it, mirroring the patches directory. Also note that userpatches are applied after patches in the patch directory. Did you clone Armbian build directly or are you work off your own fork? Now what i tend to do is rerun the build process to check that the patch was applied successful. So rerun ./compile.sh BOARD=topwise-A721 (Replace with the name used in your config file) BRANCH=current RELEASE=bookworm kernel-patch. if successful it should appear in the list of patches and if applied under usepatches it will helpful be the last entry on the list. Unless you have any further patches to apply you can then go on to running a full build. I am suprised no one has yet done a video on the patching process yet Have you attempted disassembling the tablet to check for any solder pads present which could be the serial console? If there is then it may be possible to hook up a usb to serial converter. This could at least be a solid indicator to confirm that the device is at least booting. best of luck Ryzer pcduino2-hdmi-enable.patch

baudrate: indeed at 1500000 The serial actually did not work before. Back when I first installed the Helios I used a C-A cable. Now I gave it a try with one and it improved the behavior: instead of appearing and disappearing, the usbserial device is now constant. The issue is just that nothing is shown via `screen`. I think I'll try by inserting a HDD because of what you said. I remember the USB-C cable issue. To be sure, I had removed a sliver of plastic using a cutter just like I did a couple years ago. No issues with clarity, I know about that quirk of the Helios. But yeah, this was not the issue now as I only worked with "modified" USB-C connectors. I unmounted the "disk" (SD card) before working with it. That should be safe as nothing tried mounting it afterward. Was the whole thing written: The `dd` command finished and balena Etcher even confirmed that the Flash was complete. So I think this is also a yes. conv=fsync: No I did not do this. Repeating the whole procedure with this and then after reinserting, I'll get a sha256sum of the contents… It worked, the resulting sha256sum is identical. Just trying to boot the machine again… Same behavior, sadly. HDD not yet inserted btw, will do that tomorrow.