Octopi @ Raspberry 3B+ and 3.5" Touch screen will not start desktop enviroment

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1

Hi all,

I am quite new here at the board.
Got some expirience in 3D printing.
I was running octopi at an old RasPi A ... it did his job.
A few weeks ago I swapped to a RasPi 3B+ and it worked fine as well.

NOW ... I purchased a 3.5" Touch Screen as bundle with a new case.
Mechanically it fits well ...

First startup was only a white screen ...
I figured out how to install drivers and stuff.

The next boot was successful ... I got a login prompt at the screen.
Now I found out how to auto-log in ... BUT ...

... now I need your help.
Octopi starts up and shows the default "no desktop enviroment installed" message.

I used the recommended prompt to install it:
sudo /home/pi/scripts/install-desktop

BTW ... I am connected via SSH-SHELL and my computer's OS is Linux Mint.

Running the prompt turnes out some questions which I answered correctely:
"any key"
yes

A long installation process began ...

Final msg:

--- Setting up Pi to boot to desktop
--- Done!
You might want to reboot now: sudo reboot

While reboot the pi obviously tries to bring up a different (white) screen and falls back to an undefines state with a no-blinking cursor at the upper left corner.

Long story I know ... can anybody help me?

Thanks so much in advance.
Cappy

(sorry for my probably knotted English)

2

... oh.

I checked "raspi-config" and found out that the lowest available default resolution is 640x480.
My Display has 480x320

Any idea how to change to this resolution?

Cappy

3

You might want to review the specifications for /boot/config.txt and tell Raspbian what resolution you're hoping for. Check the link on that page for display and review hdmi_group/hdmi_mode.

4

Hi,

thanks for pushing me to config.txt
I'll check it at home.

I did not know, octopi is running on Raspbian OS :upside_down_face:

If I understood right I have to choose the HDMI mode?

Cappy

5

Here is an additional page with a more detailed config documentation
https://elinux.org/RPiconfig

6

Hi again,

I checked both links ...
If I am right I have to use group_2 DMT!?
But I tested mode_1 CEA as well.

In both modes I tried to get a picture running the lowest resolutions but without any visible stuff on the screen.

Any more hints for me? :expressionless:
Cappy

7

Maybe...

hdmi_safe=1

Try that.

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