Ubuntu 20.04 arm64 raspberry pi 4 default gnome desktop graphical errors

[hackedmacbook111]

I recently installed Ubuntu 20.04 arm64 for raspberry pi with command

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sudo apt install ubuntu-desktop

Every time the ubuntu goes into sleep mode and I wake it up the screen is black and I have kind of repaint the desktop by moving the mouse around
Does anyone know how I can i fix this graphical issue
or a way I can possible reinstall for a different flavor of ubuntu

[hackedmacbook111]

I still have a raspbian sd card I replaced the no longer supported raspbian x nighthawk edition with ubuntu 20.04
To install the image I used the raspberry pi imager in raspbian on the rspberry pi 4 B 4GB

[kerry_s]

first thing you should do is grab "dconf-editor" and disable the lock screen.

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sudo apt install dconf-editor

search "lockdown" in dconf

i was going to try ubuntu with the budgie desktop, just haven't got around to it. last time i tried the standard ubuntu(gnome-shell) it ran like crap.

i'll give it a go later let ya know how it went.

[hackedmacbook111]

I changed the desktop of the gnome version and there seems to be less graphical errors
Also I think that fixed it partly
Also I will try command you provided to disable lockscreen
I have been having trouble booting I will see if this command fixes that

[kerry_s]

i'm in the ubuntu 20 64bit, using ubuntu-budgie-desktop, other than being a little slow i don't see any glitches. i only just started messing with it 30mins.
it's just so slow compared to my raspbian lite+budgie-desktop.

did you add the proper stuff to /boot/firmware/usercfg.txt ?

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disable_overscan=1
dtparam=audio=on
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
gpu_mem=124

be back.
still not worthy, back to raspbian for me.

[hackedmacbook111]

I fixed the graphical errors and still have the lockscreen
There is one graphical error where the date and time are but it doesn't seem that much of a problem
Your first reply was enough to fix it
Thanks For your help
the df-conf was enough to fix it

[hackedmacbook111]

Is editing that file safe to edit in ubuntu on the raspberry pi or can I edit it with raspbian buster

[kerry_s]

Is editing that file safe to edit in ubuntu on the raspberry pi or can I edit it with raspbian buster

how ever you choose, i edited it in raspbian before I even booted it, but I've also done it from a booted Ubuntu install.

I'm thinking you should check your wire, unplug and replug the hdmi. what you described doesn't sound like a pi issue.

[hackedmacbook111]

I put the other hdmi cable in the freezer for a few weeks because raspbian wouldn't boot
I just took it out of the freezer and pluged it into the raspberry pi all graphical issues are gone

[kerry_s]

why would you put copper wiring in the freezer? that will make it brittle and prone to failure.

[hackedmacbook111]

I have no other place to store it other than on the floor
That is where I am storeing my raspberry pi 3 B+ is in the refridgrator

[hackedmacbook111]

I just plugged in the pi 3 it still works after being in the refridgerator for nearly 6 months

[kerry_s]

alright, as long as it works for ya.

[hackedmacbook111]

RIP Chromebook
stuck it in the freezer and screen got so far damaged that it was trash It would turn on but screen wouldn't work properly
I guess I will turn pi3 into a chromebook with chromium os
Also RIP Nintendo Switch
Put it in the freezer and thing got frozen solid because I stuck it in ice maker that it turned into block of ice
might as well replace it with new switch lite
Then RIP raspberry pi 0
was placed in microwave and friend didn't see it and microwaved the raspberry pi 0
the thing was nothing but a melted mess of raspberry pi 0 had to throw whole microwave in trash

[kerry_s]

RIP Chromebook
stuck it in the freezer and screen got so far damaged that it was trash It would turn on but screen wouldn't work properly
I guess I will turn pi3 into a chromebook with chromium os

let it sit for a few days, not in the fridge/freezer

[hackedmacbook111]

I guess I can take it out of the freezer and put it on my shelf full of ipads and put a few ipad 1's in the freezer. I will be going to a furniture store next week to get another shelf to store all my controllers so they aren't inside the oven anymore.

[pjc123]

I am having the same problem. Just installed ubuntu with default desktop and screen blacks out and I can use the mouse to paint wide lines all over the place. Did you come up with a definitive fix?

[pjc123]

I switched to MATE.....no issues. I use the command line 90 percent of the time. I just needed a desktop that just works.