On 2012-01-24 18:24, Erik Rull wrote:
Hi all,
I assume that I found a possible source of the bad usbtablet update rate.
I did some git bisectioning but I didn't get a usable result due to too
many merges (or maybe my little knowledge to git), so I proceeded with some
manual bisectioning by manually selecting commits and tested them.
The problem was that the usbtablet update-rate in qemu-kvm-1.0 was really
bad compared to qemu-kvm-0.15.0.
Did you bisect qemu or qemu-kvm?
But in 0.15.0 it worked. So I continued searching for interesting points
between these versions.
One point was the SDL commit done 2011-08-05 by Jan Kiszka.
There I found changes that affected the -full-screen option.
So I took the version from the commit above and just started with the
-full-screen option.
And everything was fine (qemu-kvm-1.0 as well)! The update rate is very
good with this option.
If you go full-screen there is constant grabbing. But I do not see the
correlation with the update rate when in windowed mode.
But I was not able to find the real change that caused the bad update rate.
Jan - is it possible to track down with this information the cause of the
bad update rate? It seems to be related to SDL - the VNC option is working
fine without -full-screen.
I would like to work without the -full-screen option.
I still cannot follow, specifically as I have XP with tablet running
here. Haven't noticed any problems so far, just rechecked against
qemu-kvm head.
Jan