Waveshare 5" round display not working

Help and Support
1

Hi all,
I’m currently experimenting with a [Waveshare 5" round display] (https://www.waveshare.com/wiki/5inch_1080x1080_LCD) connected via HDMI to my Raspberry Pi 3b+.
I had some trouble getting it to work at all but after adding

hdmi_group=2
hdmi_mode=87
hdmi_pixel_freq_limit=356000000
hdmi_timings=1080 0 68 32 100 1080 0 12 4 16 0 0 0 60 0 85500000 0

to the userconfig.txt I can see the bootscreen when powering up. After that the screen goes black and shows nothing but seems to be active as the backlight is on. Touch display plugin is installed but throws errors like:
error: touch_display: Error setting screensaver timeout: Error: ENOENT: no such file or directory, stat '/tmp/.X11-unix/X0'
So I deactivated the screensaver by setting the wait time to 0. No change at all. The error message is gone .
I took a look at the plugin folder.and checked the json files to understand how this works. There is a defaultConf.json that has all the default values. As to expect.
But there also is a config.json and that one is completely empty. Same for the requiredConf.json.
Is that correct?
Any suggestions what might be the issue here?

Regards
petjek

2

Try adding

dtoverlay=vc4-kms-v3d

to “/boot/userconfig.txt”.

3

Well, that was easy. :smiley: Thx a lot. Works like a charm now.

Need to find a proper visualisation now.

4

Hey gvolt - a BIG thanks from me too. I have spent a day upgrading from V2 to V4 Volumio. My WaveShare 7" HDMI display was the last issue I couldn’t get going until I found your suggestion. The vc4-kms-v3d suggestion works! I never needed that bit of magic with V2 running on a RPi3B+. https://www.raspberrypi.com/documentation/computers/config_txt.html says “loads an overlay that enables the kernel graphics driver”. A change for Bookworm? BUT the Volumio 4 announcement Volumio 4 is Here: A Year in the Making, Built for What's Next - Volumio says “If you want to connect an HDMI touchscreen panel, Volumio 4 has you covered with improved display management” - hmmm, how does that contrast with hours of hunting the forums to find a fix dtoverlay=vc4-kms-v3d?