jock2 did some experiemts with undervolting ... not sure how far he came
Not really far, hadn't the chance to do some extensive testing, I just shelved 0.100 volts to each operating point on a single "hot" board and stability didn't suffer. During kodi idle period, the chip of the hot board was reporting 89°C, and it was already in thermal throttling. After downvolting, kodi idled at 81°C.
Despite the reported temperatures, the heatspreader over the chip was just mildly hot.
Any ideia for V88 Plus 4k?
Try the Alfawise A8 image
Thanks for replying and sorry for the characters but I copy and paste.
Actually, I only have one bluthoot dongle inserted and this connection is not detected either.
As last resort you may try armbian: CSC Armbian for RK322X TV Boxes - TV boxes - Armbian forum
Check if ethernet and/or wifi works, save a dmesg log onto the sdcard and upload it here.
Unfortunately, in system, my friend tells me that it has failed to past and with the other methods it is impossible to post the log file because there is no connection to the network, so I cannot show you the log file.
Sorry, without the logs it's impossible to debug.
Can't you even use an USB Wifi dongle to get temporary connection to upload the logs?
PS: please don't write with such big font, it's rude and contrary to the netiquette
I also tried the mainline image for rk 3229 a95rx1 with the same result, it starts but no connection appears in the libreelec setting.
can something be done to prove it?
Orange Pi 3.many addons,don't work.For example RaiTv
Many addons needs to be updated to work with latest Kodi because python 2 has been dropped and python 3 now is the default. Some addons (like RaiTV) are not compatible yet, but you may try to checkout latest source code on github (this seems the most recently updated repository: <GitHub - PPlayerxx/plugin.video.raitv: xbmc4xbox plugin for RAI>)
Display MoreHi, Kwiboo.
My board is H96 Max Plus 4GB/32GB - RK 3328 (8D4_v 1.1)
These images have worked:
LibreELEC-RK3328.arm-9.80-devel-20191231082706-fae7724-rockbox.img.gz
with rk3328-box-h96mp.dtb
Kodi starts: OK
Ethernet: OK
HDMI CEC: OK
HDMI audio: OK
IR: OK
1080p/i videos: OK
Repositories do not work (failed to connect),
How to fix it? I would prefer the stable version of Kodi 18.7. Could you compile? Now most of the bebe plugins (Polish TV) do not work. Thank you and best regards.
This thread is for early mainline kernel, so no Kodi 18.7 here.
Display MoreHi all,
I've discovered that changing the gpu governor from 'simple_ondemand' (that seems to be hardcoded at startup into lima driver) to 'performance', set the gpu clock stable to maximum rate, improving overall gui experience.
Codeecho -n performance > /sys/devices/platform/20000000.gpu/devfreq/20000000.gpu/governorI've also experimented that
- the gpu is overclockable at 700Mhz (higher clock rate cause hard reset)
- CPU can be overclockable at 1,500Ghz
However, the above clocks settings don't seem to make miracles (at least with kodi).
Something I noticed that too. Actually the driver should take care to do ondemand scaling, but the GPU is not reporting the load very well so it always stays at lowest frequency.
Overclocking does not worth it, the GPU and memory subsystems (2 core GPU + 64 bit memory bus) are simply not tough enough on the rk322x.
Anyway to make it permanent:
echo 'echo performance > /sys/class/devfreq/http://20001000.gpu/governor' >> ~/.config/autostart.sh
Hi jock2, I'm a bit confused about what is my real model, but i think it's normal with this chinese boxes.
Ahah, we're all confused trust me!
In the same chassis of yours (MXQ Pro 4K) I have a DDR3 rk3228b board signed as r329q v3.1, instead in another one (MXQ 4K) there is a rk3228a DDR2 board signed as xt-mx4vr-v01 
If you could share your trick the let UHS mode work would be greatly appreciated!
I've a similar board (mine is mx4vr-v01). The image that works for me is the one for "MXQ 4K Pro, RK3228A, DDR3".
Probably you need to replace kernel dtb because in my case the image boots, turn on blue led but freeze with blank screen.
So I've extracted the dtb from my android firmware and used that.
That one is a MXQ 4K (without Pro), so you get RK3228A and DDR2 memories (not DDR3).
I tried to follow those instructions, and I had nothing but a black screen when trying to boot.
It didn't work because because you used dd on the partition /dev/mmcblk0p1.
Instead you have to use it against the device /dev/mmcblk0 (without the trailing p1)
I will try this method, but i'm afraid of erasing flash on my box, since I don't have the firmware to flash android back later if necessary... (since it is a chinese version of T95Z, I couldn't find it on internet).
Is it possible to backup the flash/rom using rkdeveloptool? Is there any other way o backup my image?
Yes, you can also backup your existing firmware using rkdeveloptool. I added some instructions in the first page on how to backup and restore the firmware based on those from the rk3288. I cannot test them right now because I don't have a mal e-to-mal e cable.
Otherwise you could follow fabiobassa advice and mix armbian rootfs with libreelec boot - there are more instructions on a link on the first page on armbian forum again.
Yet, if you have issues or questions about armbian, it is much better to write there so other armbian users can help you (you may also ask user hexdump who made the working libreelec boot + armbian rootfs mix)
Any tips on how to install/boot it on my device?
I am able to boot LE image for v88 mars II (3228) without problems, but I prefer to have armbian.
There are some precompiled images and instructions on armbian forum, feel free to download and test them!
How is it going? Do you have any guide on how to boot it on TV Box?
Well, at the moment legacy 4.4 kernel works fine. About mainline kernel, I imported knaerzche patches and they works fine, but at the moment the Lima driver does not work with X11.
Some installation instructions and (old) images are available on the armbian forum
Other than that, you should be perfectly able to use rkdeveloptool to burn the image directly on the embedded emmc and it should work flawlessy.
Yup, I'm doing it: GitHub - paolosabatino/armbian-build at rk3229 
Are you saying that it should be rk3228 even though AIDA 64 says rk3229? For the price paid, I was aware that s912 wouldn't be the chip inside.
Is there any android APP that I might run to see some chips information? Ie: Wireless chip, DDR3 or other... etc.
I will give it a try with the image you suggested. Thank you very much!
We reviewed several rk322x boards and found a board which has a SoC marked as rk3229, reports the signature of rk3229 from the efuse but does not boot with rk3229 images. Instead it boots with rk3228 images; so, yes!, rockchip really made a mess around this chip.
balbes150 did you consider to add a minimal extlinux.conf to let mainline u-boot boot?
