HDMI --> VGA Adapter Compatibility

[longsleep]

HDMI is getting initialized by the in U-Boot FTD to 1080p@60Hz and the DTB used by the Kernel. You can change it there (needs developer skills and tools) if you want other resolutions.

optargs is supported yes, but the disp.screen0 parameter is not.

[marco97pa]

I am a linux noob, but thanks for your help longsleep. So,what should we do to change the resolution?

[longsleep]

If you are not a Linux developer you do nothing and wait until someone creates a way for you.

[Faye]

Ah, now I see how it works. The dts has an entry for boot_disp, which has the value 0x040a. I tried changing this to what I thought it would be but it turns out to have been wrong - it picked a 3D mode - so that's entertaining! I tried using dtc from the Ubuntu 16.04 device-tree-compiler package but it couldn't read the format so I don't trust the dtb it generates. longsleep how are you generating the dtb?


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[rahlquist]

Ok the unit I bought from Amazon was no real help.

http://www.amazon.com/Adapter-Female-Con...ge_o00_s00

I tried two older 4:3 ratio dells, and a LG W1934s and of course the Vizio http://www.techhive.com/product/1421057/...cd-tv.html

The LG and the Dells will give me a chopped screen but no matter what fbset settings I tried at no time was I able to get a full screen image. Maybe the Pine folks unit will work better but for now if its not 1080p@60 forget it.

[Faye]

I didn't correctly determine the meaning of the values. Boot_disp sets the mode, I get a corrupted screen when I'm trying stuff, so I am going to stop guessing how it works for now.


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[marco97pa]

Now, you can change the resolution and the HDMI mode using this longsleep tool: http://forum.pine64.org/showthread.php?tid=980
That's a great news to VGA adapter's users.

[marco97pa]

Top work longsleep, this works for me and I'm using a HDMI->VGA converter

The last longsleep's work seems to solve the problems with VGA converter

[frewind]

Top work longsleep, this works for me and I'm using a HDMI->VGA converter

The last longsleep's work seems to solve the problems with VGA converter

It sure does, I'm limited to 720p at the moment due to my monitor not handling 1080p, it's a 4:3 aspect and it maxes at 1600 x 1200 @ 60hz, so 1920 × 1080 is a no go at the moment for me... but I am eyeing up the 1080p capable monitor my wife has on her PC (sssshhh no one tell her!!!)