Ultrawide 4k display

[cvb941]

Hello,

I have the Wisecoco 4k touch ultrawide display with resolution of 3840×1100.

I'm trying to run Android auto on it with Hudiy 1.2, but it only covers half of the screen. It basically renders the 1920x1080 stream without any scaling. I'm attaching a picture:

IMG_20251106_181706.jpg (244.59 KiB) Viewed 513 times

Here is my config:

Code: Select all

"androidAuto" : {
    "speechAudio" : true,
    "mediaAudio" : true,
    "resolution" : "1080p",
    "bluetoothAddress" : "",
    "autostart" : true,
    "fps" : "60",
    "dpi" : 280,
    "widthMargin" : 0,
    "heightMargin" : 0,
    "width" : 0,
    "height" : 0,
    "x" : 0,
    "y" : 0,
    "useRpiDrm" : true
},

I tried setting the width and height parameters, but they did not do anything. Margins worked but only made the window smaller.

I have used OpenAuto Pro before and I remember that I have solved this issue there somehow using the settings there (maybe using negative margins?) and the Android auto interface was nicely displayed on the whole ultrawide screen with adjusted layout and without any stretching.

Is there any config that I can do to achieve this fullscreen ultrawide with Hudiy now?

[hudiy]

Hello,
The maximum resolution supported by Hudiy is 1920x1080. The Hudiy UI will scale to larger display sizes, but the maximum resolution for Android Auto in the supported protocol is 1920x1080 with no option to upscale beyond that.

You can try reducing your display resolution proportionally (for example to 1920x550) or use the split-screen functionality where Hudiy UI occupies one part of the screen and Android Auto the other.

[hudiy]

We can unlock experimental 2k (2560x1440) and 4k (3840x2160) settings in an upcoming release. Unfortunately, we don't currently have the proper hardware to fully test these modes. The main concerns are Wi-Fi throughput and the hardware decoder capabilities of the Raspberry Pi. For Trixie, we've introduced support for 80 MHz Wi-Fi channels, which should help with bandwidth. The DRM pipeline on both the Pi 4B and Pi 5 should handle 4K at 30 FPS, so there's a chance it may work.

[cvb941]

Thank you for your fast response.

I understand that the Android Auto stream resolution maxes out at 1080p. I don't mind the non-native resolution, even at 1080p the image was okay on my display.

I think the trick on OpenAuto was to increase the vertical margin, so that the AA interface in the 1920x1080p stream would shrink down into the correct aspect ratio with wasted space on top and bottom. OpenAuto would then scale the live image (without the margins) on the whole display. This would make the whole display covered without incorrect aspect ratio stretching, albeit at effectively 1920x(1080 - vertical margin) resolution.

I would think that I could achieve this now using the width and height settings, but they seem to not do anything (the render surface size is always the same as the native AA stream size). Is the bug due to the drm? I tried setting it to false with no difference, maybe the drm is used anyway. Anyway, either fixing that or some other combination of settings would be great to have the option to achieve my described setup.

The 2k and 4k AA resolutions sound great, looking forward to testing that. It would be great to try them out on my display! Also the 80MHz bandwidth. I will also take a look at the split-screen setup you mentioned, as I wanted to have that in the past as well, to watch Jellyfin or Plex on the other half