vesafb uses _no_ acceleration for scrolling unless you boot with ypan or
ywrap option. This might be the reason, becauce the CPU has alot of work
in kernel mode if you are scrolling the consol...
A native framebuffer driver like matroxfb is _way_ faster becauce in can
use the accel engine for the scroll bitblits. vesafb can't...
Gerd
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