XU4 as difficulty under android to hook to HDMI monitor

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sivadsivad
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XU4 as difficulty under android to hook to HDMI monitor

Post by sivadsivad »

Hello Everybody
I run a bunch of xu4 under linage 15.1 lineage 14.1, ATV and no ATV . In all configuration xu4 have difficulty to connect with hdmi. I debug with serial and I can see the program start and restart several times before it "hooks" to hdmi monitors. on the other side the monitor try to find a signal on the hdmi port, then it switch to the analog port, then to the dvi port, then back to the hdmi port ... Is seems both the monitor and xu4 are doing a loop and when they are both together on the "hdmi " they hook. My monitor is 1280x1024 pixel and I need , for my work, to set odroid to be 1080p 50. Is there a software way under android to resolve this "hook" problem or is there a hardware way to hack the hdmi cable by cutting a wire or by sending a voltage signal to the XU4 or to the monitor ?

Sometimes on a hard reboot they hook right away, sometimes they don't.
Sometimes on a soft reboot they hook right away, sometimes they don't.

any comment is welcome.

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Re: XU4 as difficulty under android to hook to HDMI monitor

Post by odroid »

Do you use an HDMI-to-DVI cable with your 1280x1024 monitor?

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Re: XU4 as difficulty under android to hook to HDMI monitor

Post by sivadsivad »

I use a regular hdmi cable, i tried different ones,
Same result. As I tried also to hook xu4 to a 1920 1080 classic hdmi monitor I had the same problem: the monitor loops from hdmi to dvi to analog input; the xu4 serial output shows me odroid doing it’s own loop , kernel start, looking for hdmi and so on. It can loop 10 times before they find each other or 2 or 6 or whatever; there is no rules. But it seems there are less loop when I do a hard reset. My real problem is that I have 25 xu4 hooked to 25 monitors; they have to start together and play full screen 1080p 50h on 1280x1024 …

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Re: XU4 as difficulty under android to hook to HDMI monitor

Post by odroid »

I think there could be an EDID detection problem.
In that case, manually force the HDMI output resolution by editing boot.ini file.
https://wiki.odroid.com/odroid-xu4/os_i ... ce_bootini
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sivadsivad (Tue Nov 23, 2021 4:57 pm)

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