Not sure, but maybe the QXL driver will help:
qemu-system-x86_64 [...] -vga qxl -global qxl-vga.vram_size_mb=128 -global qxl-vga.ram_size_mb=128
this post was submitted on 14 Sep 2024
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It's an improvement, but 500MB+ would be perfect.
Replace the value 128 to 512. And try again :)
I was under the impression that QXL driver were capped at 256MB too, thanks.
Vga is fixed iirc, the original frame buffer was tiny, the emulated one gives you 16mv
Cirrus logic gives you 16mb too iirc, then you can use other drivers that give you more,
https://www.kraxel.org/blog/2019/09/display-devices-in-qemu/
If I'm reading correctly, there isn't a modern GPU driver for QEMU that supports customizing VRAM.
Qxl does, it's fairly modern.
Otherwise you have virtio and virglrenderer, which are as modern as it gets this side of pcie pass through or intel's sriov.
Thanks the list is very useful.