Hi!

I'm new here, so hi to everybody

I have a new ASUS M515UA Ryzen 7 with Radeon graphics. The graphic is an AMD Renoir.

The problem is that when I open a video in a KDE Neon live USB the video quality is fine, but when I install the SO, video quality is very bad (very pixelated, but no othe issues that I can see). SO looks fine, but chromium contextual menu shows blank. That's easy to solve unchecking hardware acceleration, but I think it points to an issue with the graphic card. However, as far as I can see, I have the latest amdgpu automatically installed.

I cheked a few commands that I found here and there:
inxi -GS
lshw -c video
lsmod | grep amdgpu
dmesh | grep -i amdgpu
And the outputs of the Live and the installed versions are the same.

One of the outputs (I can share them if you want) detected a missing file in the radeon firmware folder "renoir_ta.bin". I found the file in the internet and copied to the right folder (/lib/firmware/amdgpu). Reboot and still bad video quality.

SO is KDE Neon up to date and fresh install. KDE plasma version 5.23.4, KDE framework 5.88.0. The bad video after installing replicates in X11 and Wayland, and also in a fresh install of Kubuntu LTS. I used VLC but it also happens with Kaffeine.

Not sure if related, but VLC fails to close properly after opening a video and then it refuses to open. I have to kill -9 it. Again, this also point to issues with the card, but no idea what can happening. Maybe this is OS version related because it also happens in the Live version.

Also maybe unrelated, but KDE fails to come back after turning monitor off automatically. This is solved by turning off the option of turning the monitor off after some time, but I don't know what to make of all these little issues that may be graphic related but that may be SO version related. What do you think?

I would think of a damaged graphic card if not for the live showing good quality. I would appreciate any suggestion about what can be happening or where to look at. What does the Live version of an OS does that the installed version doesn't?

Thanks!

[EDIT: SOLVED: It wasn't a hardware issue, but a VLC option. Solved in Tools -> Preferences -> Output, change from Automatic to XVideo (XCB)]