rafaelSorel

RPI does not have any internal storage, it boots mainly on the SD card, I did not change any partitions, I just described the partitions in the dtb file to match the original dtb, I think that the kernel does not see the /dev/system partition, I don't know why, here the modified dtb file that I have updated, not the original one. gxl_p281_1g.dts

Hello, I have bought an x96mini with a uboot version from 03/2019, everythings works perfectly when booting from SD, but when I try to boot from internal the kernel boots and it stops at "waiting for root device", after an investigation I have noticed that the partitions layout is different from the standard one, I have updated the dtb to be inline with that layout but the problem remains the same, unable to boot from internal. Here is the original dts file from that box, Any help would be appreciated, knowing that I am using the kernel version 3.14. Thanks, 01_dtbdump_Amlogic.dts

you need to find a dtb file that could be used with that particular box, the S905W are quite different , so with some luck, one of the dtb files for the s905x or s905 will work. Otherwise you need to extract the dtb file in use on android and adapt it.

[Update] I manage to change the bootup logo successfully, basically we need to unpack the logo.img and change the bootup.bmp with the wanted one, the format needs to be (16bit RGB565 BMP)

@balbes150: I have checked the u-boot help command line and I could see the sdc_update command. So basically it is possible to update the bootloader from u-boot command line. My question is : What is the best way to flash a new u-boot on emmc (sdc_update from u-boot console or running dd if=u-boot.bin of=/dev/bootloader from running linux on SD card) ? The second thing is since I want to update the boot screen logo, I managed to extract the bootup.bmp from logo.img partition using this script https://github.com/steeve/aml-imgpack then I have repacked a new logo.img with the changed bootup.img file using the same script. so is it possible to update the logo.img using this command: "dd if=logo.img of=/dev/logo bs=32M" ? Thanks,

No update at all, I have used the device as shipped, (no changes were made to dtb files) .

Well it was a connector issue, I have changed connector and it worked like a charm, I have tested the device connector on S905, S905X and S905W with a success. This is good news because we don't need anymore to weld any thing on the board to get a serial output, we could even setenv on u-boot without booting on android or even root it. For those who are interested here is the link from where I have ordered the devices: Micro-SD-Card-Breakout-for-Exporting-UART-and-JTAG Have a nice uarting

That is the model that I was referring to: https://linux-sunxi.org/MicroSD_Breakout I have bought something similar and it does send uart data over SD(It is the case for all amlogic socs.), the only problem is that this data is unreadable (unreadable chars). knowing that I'am using the S905X soc.

Hello Guys , I have ordered Micro SD Card Breakout for Exporting UART and JTAG Pins to get serial output on the SD card port without making any welding on the box. I have test it and it seems to work. The problem is that the output is some king of unreadable characters. I don't know whether it is a config issue or something else ? Does any one have used the UART over SD port ? Thanks,

I have found the issue, indeed the server packages does not contain pulseaudio and it seems that the alsa config files are not well configured to handle the volume control. I have installed and configured the pulse along with alsa config files and now I can perfectly control volume on all outputs (analog, hdmi, spdif.)

Hello, I am trying to control volume Up/Down and mute through alsamixer with no success. When launching alsamixer the only changable device is DAC Digital, but actually it does not change anything, the volume remains at "56" and won't change. It is almost not possible to control volume through alsamixer or amixer command line. The only control I have found is the mute/unmute through /sys/class/amaudio but not the volume level ! It is the case for all armbian (debian, ubuntu) servers packages. I think some thing goes wrong... Any help or hint would be appreciated. Thanks

Typically most of the android boxes contains 1/8" coaxial spdif. So if your AV receiver (home theater) doesn't have a coaxial spdif input, you need to convert it to optical spdif. So you gonna need a cable like this: https://www.amazon.com/Micca-Premium-SPDIF-Digital-Coaxial/dp/B00V436UQU and to convert it to optical output something like this: https://www.ramelectronics.net/pof-820-1.aspx I know it is a hell of devices but this is the only way to get your optical output. But check may be your home theater has a coaxial spdif input and you are only going to need the first cable.

Hello, Have you made a backup of your android image from emmc before ? I have got a same situation and I backup the emmc from running linux from SD card, so basically you need to bootup on linux from SD card then reflash the emmc using ddbr_restore script. may be uboot could not init emmc , but linux does.

Ok I will check the help command. And make some search and get back if found something weird. Thanks,

Is there a way to check the team of the u-boot installed ?