Issue with Screen Resolution on Raspberry Pi after HDMI Cable Swap

Anthias
1

Hi,

I’m Alexander from EasyComp Zeeland, also a volunteer for the Netherlands Red Cross. I’m building a digital screen for the waiting area of our Medical tent, The setup uses Screenly/Anthias on a Raspberry Pi 4. After replacing a broken micro HDMI to full HDMI cable (original Pi cable) with another original Pi cable, I’ve noticed the following:

  • The boot screen and any web UI screens show black borders and are not fullscreen.
  • Videos, however, play in fullscreen without issues.

I’ve already tried adjusting the resolution in config.txt, but it doesn’t seem to fix the web UI black borders. Additionally, for our wait screen, which includes a clock and weather display, I need to ensure the screen refreshes automatically without caching or that I can clear the cache when needed.

Could you advise how I can fix the resolution issue and set the web screens to refresh without caching?

Thanks in advance for your support!

Here is the video of the issue: Send by EasyComp Zeeland (The link is valid for 100 downloads or 7 days until October 8, 2024, 16:30:00 ). Please avoid clicking the link unless necessary to give the developer a chance to access it. Thank you!

Here are also some screens (videoplayback):

Scherm­afbeelding 2024-10-01 om 18.38.06
Scherm­afbeelding 2024-10-01 om 18.38.061728×920 99 KB

Informational display:

Scherm­afbeelding 2024-10-01 om 18.38.30
Scherm­afbeelding 2024-10-01 om 18.38.301626×777 47.5 KB

Kind regards,
Shaady Alexander
EasyComp Zeeland / Netherlands Red Cross Volunteer

1 Like
2

@ECZ, while we’re looking closely at the issue, I’d like to ask the following questions:

  • Do you reboot your device every time you modify config.txt?
  • Have you taken a look at config.txt and checked if disable_overscan is set to 1? (This could remove the black borders around the screen when playing assets.)
  • What Raspberry Pi OS version does the device run? (e.g., Bookworm, Bullseye, etc.)
    • You can check this by running cat /etc/os-release.
  • Did you restart your Raspberry Pi 4 after the cable swap?

Let me verify if caching is disabled for web assets. I’ve tested the default assets (the Screenly Clock and Weather apps) seems to display data without any issues. Let me know if you’re having issues with caching.