Display flashes in all colours

General Discussion
1

I have put together a Raspberry Pi 4 with an OV5647 camera and a 5 inch display.
I have installed motioneye as software. That also works great.
Now the image from the camera should also be displayed. I have installed chromium for this. I then selected chromium in the autostart option and configured it with http://localhost:9081.
After a restart, the screen flashes in all colours. One second white then one second green then one second blue and so on.
What do I have to change?
Where can I find log files?

2

Did you set a screen resolution with dietpi-config?

3

I have only changed the resolution at chromuim to 800x600. Which option do you mean

4

This is exactly what I meant. There was a case a week or so ago, where somebody had also problems with chromium, but only chromium showed visual artifacts. Setting a screen resolution with dietpi-config solved the problem in this case.

5

But probably this case might b different as chromium is started within kiosk mode and not an a desktop?

6

So chromium in kiosk mode starts without a dektop environment? I didn’t know that. It’s just xserver and chromium?

7

well, it’s still an xserver but not a full desktop.

8

chromium is started in kiosk mode.

9

exactly

10

I also think it is a setting from the x server. The resolution seems too high for the DSI display of 5 inch

11

display_auto_detect=1
#dtoverlay=vc4-kms-v3d
max_framebuffers=2
enable_uart=1
I have changed all this in /boot/config.txt and it works

12

Now I just have to switch off the mouse pointer

13

https://dietpi.com/forum/t/how-do-i-get-rid-of-the-mouse-pointer-when-i-start-chromium-w-o-desktop/15769/2

https://github.com/MichaIng/DietPi/issues/2575

14 
 G_AGI unclutter && echo '/usr/bin/unclutter -idle 0.1 &' > /etc/chromium-browser/customizations/99-dietpi-unclutter
[ INFO ] APT install unclutter, please wait...
Reading package lists...
Building dependency tree...
Reading state information...
Recommended packages:
  unclutter-startup
The following NEW packages will be installed:
  unclutter
0 upgraded, 1 newly installed, 0 to remove and 18 not upgraded.
Need to get 15.6 kB of archives.
After this operation, 42.0 kB of additional disk space will be used.
Get:1 https://deb.debian.org/debian bookworm/main arm64 unclutter arm64 8-25 [15.6 kB]
debconf: delaying package configuration, since apt-utils is not installed
Fetched 15.6 kB in 0s (46.5 kB/s)
                                 Selecting previously unselected package unclutter.
(Reading database ... 32080 files and directories currently installed.)
Preparing to unpack .../unclutter_8-25_arm64.deb ...
Unpacking unclutter (8-25) ...
Setting up unclutter (8-25) ...
update-alternatives: using /usr/bin/unclutter-classic to provide /usr/bin/unclutter (unclutter) in auto mode
[  OK  ] APT install unclutter
bash: /etc/chromium-browser/customizations/99-dietpi-unclutter: No such file or directory

unfortunately does not work

15

Before you can write to a file you need to create it.
This is also the solution to hide it on hidle.
There is also another way on the linked GitHub issue to hide it permanently.

16

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