Federico Beffa <be...@ieee.org> skribis: > Have someone found out the reason for this poor performance in > qemu-kvm and how to fix it?
Yes, I eventually found out: by default, QEMU uses a Cirrus VGA graphics adapter emulator, which is damn slow for this kind of framebuffer thing. The right thing is to use ‘-vga std’, which uses a “standard VGA” emulator, which doesn’t have this problem. However, X will fail to start currently when using this. The fix is to use xf86-video-modesetting. But this driver is not currently usable because it requires a version of libdrm incompatible with that currently used by xorg-server/MESA. Long story short: we just need to update MESA to use the newer libdrm, and we should be able to fix that. Would you like to try? :-) Thanks, Ludo’.
