Is there a way to force 1920×1080 for the X-Server?

[grimmt premium]

grimmt premium

6. Mai 2021 at 20:26 #51207

I have a 4K LG TV and I have my Max2Play system connected via HDMI – I’m having difficulty forcing 1080p resolution consistently.

I have tried forcing Max2Play HDMI screen configuration to 1920×1080 using the Raspberry plugin settings:
o HDMI-Resolution: HDMI-Resolution: 1920×1080 @ 60Hz
o HDMI-Mode: HDMI
o HDMI Force Hotplug: enabled
And discovered, this only works properly if I reboot my Max2Play system with my TV turned off or detached.

If I reboot my system while the TV is turned on, the XServer and subsequent Jivelite app always starts in 4K resolution. This causes jivelite to fill only a top 1/4 rectangle of the screen.

I’m guessing the XServer is using EDID to sense the available HDMI display resolution rather than forcing the selected resolution.
Is there a way around this that I am missing?

[I’ll also keep looking for a solution, and I’ll post back if I find anything.]

• This topic was modified 3 years, 11 months ago by grimmt. Reason: clarify what 1/4 of screen is filled

[grimmt premium]

grimmt premium

6. Mai 2021 at 21:18 #51208

I think I found a solution.
I added the following parameter to /boot/config.txt

hdmi_ignore_edid=0x5000080

The XServer now starts up in 1920×1080 resolution.
Since the XServer appears to be overriding the „forced resolution“ selection due to EDID, perhaps your Dev Team should consider adding this as an option in the HDMI Settings for Display Resolution area.
i.e.
Disable EDID (checkbox) Disable Extended Display Identification Data (use this in the event a forced resolution is not working)

[MarioM Moderator]

MarioM Moderator

11. Mai 2021 at 11:57 #51224

Hi grimmt,

Thank you for pointing this out. Actually, the HDMI Force Hotplug should ensure that the resolution remains the same. As always, I will report this to our developer.