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Beginners • Proper way to configure HDMI display

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I have an MHS-3.5inch Display attached to my Pi 3B+, along with a coupler that forces HDMI to that display.. Going through raspi-config and through searches on internet, I have not found a way to configure the HDMI display. (Typically - at least back when I was responsible for such systems - this would be some file in /etc/X11/xorg.conf.d/.) That directory is empty on these devices. Seems like three lifetimes ago - I've forgotten a great deal about this.

It seems that the OS/Display partnership "just works" such as it is, but I have the annoying problem that (it seems) X only utilizes about 80% of the width. (For example, if I open an all-white page using the following .xsession command, the leftmost 80% (or so) of the screen is white, and the remainder is dark). Considering the tiny size of this display, that's a significant loss, and I hope I can gain the full width. Using javascript, I'm assured that the width is 1280 (and height is 720), but X-position 1280 is nowhere near the right side of the screen. By the way, I have two of these with the same onfiguration and they act alike, so I'm confident this is not some hardware issue. Therefore I assume this is a device configuration problem. I'm opening chromium-browser with the following .xsession line:

Code:

chromium-browser --start-fullscreen --window-size=1280x720 --disable-infobars --noerrdialogs --kiosk --incognito https://my-server/white-page.html
Any advice for things to try?

Statistics: Posted by delovelady — Sun Jan 14, 2024 12:45 am — Replies 1 — Views 1185



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