Raspberry Pi 4 with PlasmaC

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10 Jun 2020 08:43 #170926 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
So under [pi4] I tried to comment out but then it would not start color splash

I have a feeling all this is a graphics problem.

My setup is µHDMI to normal HDMI/VGA adapter to VGA display.
That chain works with *normal* Buster.

I will soon be out a couple of hours, need my feet to be taken care of chiropody

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10 Jun 2020 08:53 #170927 by phillc54
I have run that image headless and also with a cheap HDMI monitor

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10 Jun 2020 09:13 #170930 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
Tried all graphics related settings in config.txt

It makes one a bit puzzled, the only diff is that you have 2GB version and I have the 4GB and that should not make any difference.

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10 Jun 2020 09:52 #170934 by alkabal
Replied by alkabal on topic Raspberry Pi 4 with PlasmaC
I have use the image with rpi4 4go + waveshare 13" hdmi touchscreen + 2 sd card and start fine with mate desktop without changing anithing.

Is you rpi have enough power ?


www.raspberrypi.org/forums/viewtopic.php?f=28&t=243886
raspberry-pi.fr/hdmi-raspberry-pi-marche-pas-solution/

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10 Jun 2020 09:55 - 10 Jun 2020 10:18 #170936 by phillc54

I have use the image with rpi4 4go + waveshare 13" hdmi touchscreen + 2 sd card and start fine with mate desktop without changing anithing.

I am thinking of getting a touchscreen, headless on LinuxCNC is a little bit clunky. What do you think of the waveshare that you have?

EDIT: What resolution is it?
Last edit: 10 Jun 2020 10:18 by phillc54.

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10 Jun 2020 10:15 #170938 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
I have a 3A PSU

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10 Jun 2020 10:18 #170939 by phillc54
I did my testing on an official 3A PSU from Raspberry, it is currently running on a 3A MeanWell PSU.

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10 Jun 2020 10:25 - 10 Jun 2020 10:30 #170940 by alkabal
Replied by alkabal on topic Raspberry Pi 4 with PlasmaC
I'm really happy with this screen from 2 years.
(have some problem at first attempt with a dead board and after that with a updated board that does not work with Beaglebone hdmi non standard detection but seller send me 2 time replacement boards and help debugging greatly)

I thinks now is better to use a 15" but except that this screen work fine ! (including hdmi audio)

The touchscreen work better with RPI original DM (openbox) than mate (i can't click on the different menu from task bar.
I never found a correct configuration for use multitouch or twofing for some right click.


The goal is now to print a case for fit all in one RPI/screen/keyboard and have a easily removable panel with only ethernet and power to unplug for sharing with other machine.

Resolution is fiull HD 1920x1080
Last edit: 10 Jun 2020 10:30 by alkabal.
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10 Jun 2020 15:10 #170967 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
I am back to you last image of today. buster-rt.img

pi@pi4-mate:~ $ uname -a
Linux pi4-mate 4.19.71-rt24-v7lrt+ #1 SMP PREEMPT RT Mon May 18 16:17:58 AE20 armv7l GNU/Linux

This I get via PUTTY so it is booting but I get no graphics. Did run raspi-config just to assure VNC is enabled but no contact.

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10 Jun 2020 15:18 #170969 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
H O L D T H E P R E S S E S

I changed PSU earlier today and just now I just tested to move the HDMI connector closer to the 5V input and

VOILA
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