This evening I have downloaded webos-image-raspberrypi4-master-20200528141249.wic.zip from the webos-ports site, burned it to a SD card using balenaEtcher, plugged that card into my RPi4 and it booted to the webOS OSE graphical display just fine. But I bought my RPi4 last year...
This, for example, looks a lot like your problem doesn't it? It may be that your device is too new.
Thank you sir ^_^v #Downloaded
I don't think anyone tried with 8GB version before, it's very likely that the firmware in OSE is just too old. It will be the same in v2.6.0 release, but hopefully the next release will have newer firmware which will be compatible with 8GB version.
Build #218 (v2.6.0) from [https://github.com/webosose/build-webos/commit/253b139a54ee4ca74711dea6a895fe94a3d936a4 ] finished building, new images are available again on [http://build.webos-ports.org/webosose/]
Images for raspberrypi3 weren't created, because raspberrypi3 is no longer officially supported by LGE and currently in v2.6.0 it's broken (it's easy to fix, hopefully the fix will be integrated in the next release).
RPi3(it is not officially support, just fix build issue) and RPi4 8G are also supported in next OSE release.(v2.7.0)
Build #250 (v2.7.0) from [https://github.com/webosose/build-webos/commit/44e1a9f98a3ea08fabb2277de104e1a30f61502a] finished building, new images are available again on [http://build.webos-ports.org/webosose/]
Images for raspberrypi3 weren't created, because raspberrypi3 is no longer officially supported by LGE and unfortunately broken again in v2.7.0. https://github.com/webosose/g-camera-pipeline is missing submissions/15 from master branch used by rpi3, it works for rpi4, because rpi4 is using submissions/13.gav.8 from @gav branch.
@flowergom updated the g-camere-pipeline repo and now rpi3 images are available as well
Thanks for reporting this issue 
Sir, can i get version for Raspi2 ?..
last version i used "20180925122909". But i dont hav that image file anymore.
Thank you ^_^v
Build #263 (v2.8.0) from [https://github.com/webosose/build-webos/commit/2e7d72f9d7c3aea7c9e8701f1c8ad5f67edfae41] finished building, new images are available again on [http://build.webos-ports.org/webosose/]
Build #295 (v2.9.0) from webos-image: Update layer pins for 2021-01-21 (build 295) · webosose/build-webos@05effee · GitHub finished building, new images are available again on Index of /webosose/
Hello. Any chance to see fresh build for raspberry 3b+?
I can successfully build 'qemux86', 'raspberrypi3', 'raspberrypi4'
but there's no 3b+ machine. Any help would be much appreciated
There isn't separate machine for 3b+, recent raspberrypi3 builds should be compatible with 3b+ version as well, but nobody confirmed it yet in separate thread about 3b+ support (you could be first :)) Raspberry Pi 3 b+ support? - #23 by jama
Build #325 (v2.10.0) from webos-image: Update layer pins for 2021-04-01 (build 325) · webosose/build-webos@1551cd4 · GitHub finished building, new images are available again on Index of /webosose/
thank you for sharing with us
Build #361 (v2.11.0) from webos-image: Update layer pins for 2021-06-24 (build 361) · webosose/build-webos@29c18e0 · GitHub finished building, new images are available again on Index of /webosose/
Build #366 (v2.12.0) from webos-image: Update layer pins for 2021-07-12 (build 366) · webosose/build-webos@d1deb8e · GitHub finished building, new images are available again on Index of /webosose/
Super that it is available. Nice for a quick start.
I installed the 2021071514 raspberry pi image on a RPi. To start learning what it can do.
One thing I can not find, how to get back to the menu by USB keyboard control. I read that F1 should do the trick. But it does not work.
What could be wrong?
Since webOS OSE 2.0.0, Home Launcher can only be opened using the swiping from the bottom to the top.
(Because webOS OSE is redesigned for touch screens.)