Qt RHI with Vulkan on Raspberry Pi: graphic artifacts

Hello,

I have my rendering pipeline which is giving weird triangles when rendering on Qt RHI on Raspberry Pi (4 / 5).

• Other vulkan apps seem to work fine, e.g. vkcube
• The exact same binary & shaders works fine with vulkan on other AArch64 platforms, e.g. a macmini M1 running Asahi Linux.
• I see the artifacts both in X11 as well as with vkkhrdisplay platform plug-in
• It happens on every shader, even the simplest gl_FragColor.xy = gl_FragCoord.xy / vec2(1920,1080);
• It does not happen with the same shaders with the GLES RHI backend on the same hardware

I attached two images, one rendered at the window size, one rendered at a smaller resolution. So the issue seems to be when rendering to a texture ? otherwise I'd expect to see the graphics bug also on the final render.
Tested with:

• OS: Debian Bookworm
• Kernel 6.6 and Kernel 6.12
• Mesa 23.1 and 24.2