On Mon, Aug 30, 2010 at 23:31:25 +0200, Mark Kettenis wrote:
> The Xorg xserver runs a scary amount of code in a signal handler.
> It's supposed to make your mouse cursor move more smoothly, but I
> can't spot the difference when I disable that "feature".  Instead,
> this "feature" breaks certain multi-card setups and god knows what.
> 
> So we're considering switching this off by default.  Before we do
> that, we'd like to do some wider testing.  If you're regularly sitting
> behind an OpenBSD machine running X, can you add the following lines
> to /etc/X11/xorg.conf (or create one with these lines):
> 
> Section "ServerFlags"
>       Option "UseSIGIO" "false"
> EndSection
> 
> and restart X.  Let me know if you observe any significant changes in
> behaviour.

My cursor acts as usual. It occasionally turns into a big vertical
arrow-like thing, and I got the well known radeonhd bug [1] - "The
cursor shows weird corruptions at some points of the screen", although
I'm not using the radeonhd driver.

However, using this option, after starting firefox everything gets
extremely laggy, and I can interact with my machine with the keyboard or
mouse with 4 seconds intervals. After commenting this option, the
behaviour returns to the usual.


Daniel


[1] - https://bugs.freedesktop.org/show_bug.cgi?id=13405


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LIVAI Daniel
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