I have now got back to this topic. I installed wiringpi-v2.44-friendlyelec-rk3399.deb, "gpio readall" looks good. When I try to use the library to build an application I find it's not built with libcrypt. root@NanoPi-M4v2:/usr/src/pihpsdr# make gcc -o pihpsdr audio.o band.o discovered.o di...

oot@NanoPi-M4v2:~# cat /etc/os-release NAME="Ubuntu" VERSION="18.04.3 LTS (Bionic Beaver)" I changed the default setting to 800x480@60Hz but got no output. The 10.1 inch LCD supports 1920x1080 and that worked straight away as does touch. screen #0: dimensions: 1920x1080 pixels (5...

I see the same problem with "Unknown model".
The wiki still points to installing WiningPi which no longer exists.
The replacements work for the RaspberryPi 3 so may be it has to be made model aware of the M4v2.

Should be fine. I have a 2TB hard drive with Linux partitions from a x86_64 system connected to the SATA hat.

BTW, the 7 inch LCD which is advertised as up to 1280x1020 does not work.

I see exactly the same problem on the M4v2.

I hooked up the 10 inch 1280x800 LCD. The texts under the icons were blurred, so I altered /home/pi/.config/autostart/lxrandr-autostart.desktop to 1280x800 refresh rate 59.91.
Rebooted and it displays properly.
Touch also works.

I have just ordered a 1280x800 display to see if that works as xrandr lists it.

800x480 LCD's are quite common for SBC's with Mali chipsets (ODROID-C2, ODROID-N2, BananaPi, Cubieboard,OrangePi, etc.,etc.) running Ubuntu or any other flavour of Linux desktop except friendly ARM M4. The 7 inch LCD is fine on Android so it's obviously a driver support problem. My application calls...

https://www.ebay.co.uk/itm/7-Inch-Capacitive-Touch-Screen-TFT-LCD-Display-HDMI-Module-800x480-for-Rasp-B9O9/253790504816?epid=20019370468&hash=item3b1717c770:g:B8kAAOSwM1ZbYc7A The power and touch are provided via USB and the video via HDMI. When used with the supplied Android eMMC both video an...

HDMI says no output on friendly desktop. Android works fine. I would like to use this 7 inch LCD with Ubuntu. Currently using a 22 inch LCD. root@NanoPi-M4v2:~# xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 DVI-D-1 disconnected (normal left inverted right x axis y ax...

Thanks, I'll give it a try this evening.

Has anyone encountered this problem? Installed rk3399-sd-friendlydesktop-bionic-4.4-arm64-20190718.img. apt update followed by apt upgrade starts upgrading lots of packages and fails part way through and reboot won't work needing a reinstall of the img on the uSD card. It seems there is a difference...

Which Friendly Elec displays work with the M4? Does the standard Raspberry PI display also work with this board? Thanks Doug That's what I would also like to know. I have a 7 inch touch LCD 800x480 resolution attached to the HDMI port but it displays nothing. root@NanoPi-M4:~# ps fax|grep X 657 tty...

Ever since I installed Ubuntu on Fire 3 the 7" HDMI screen display was fine.
Recently it suddenly changed so I only get a bright display so nothing is readable.

It's possibly a hardware problem but I would like to see what the settings are over a ssh connection.

I tried s5p6818-friendly-core-xenial-4.4-arm64-20180228.img but Xorg ends up as a zombie task. Went back to the original microSD card with s5p6818-friendly-core-xenial-4.4-arm64-20180209.img installed. Still getting a white screen with Xorg up and running. Over an ssh login "init 3" follow...

The wiki says to compile a new kernel and only lists 3.4.y but it's running on 4.4.49-s5p6818 from s5p6818-friendly-core-xenial-4.4-arm64-20180209.img The screen resolution needed is 800x480 and I originally booted with a LCD that failed. From Xorg.o.log:- 9.856] Kernel command line: console=ttySAC0...