via k8m890 very slow with vesa

Roland Scheidegger rscheidegger_lists at
Sun Nov 26 13:53:21 PST 2006

Henrik Lundberg wrote:
> On Sat, 2006-11-25 at 21:53 -0500, Alex Deucher wrote:
>> No, vesa has never supported acceleration and as the spec stands now,
>> never will.  Are you sure you were using vesa before?  Do you have a
>> log anyway from your old setup or any x11perf results?
>> Alex
> I have a log from running 7.0.0 (to my suprise ;-). I attach it...
> As you clearly state there is no acceleration in vesa driver, I think
> there is some other problem wich didn't occur when running 7.0.0 .
> What can I do to diagnose this, I don't know much about how X works.
> I'll run x11perf to produce some numbers. If they look strange, maybe
> you could have a look or point me in the right direction.
> Thank you.
Can the vesa driver use optimized x86 assembly to access the 
framebuffer? Using 64bit (or 128bit) mmx/sse/sse2 loads/stores could 
probably make quite a difference accessing fb mem. In this case, some 
compile-time options could be the culprit.


More information about the xorg mailing list