Laggy X11 after updating to 8.0-RC1

[Scott Lambert]

On Mon, Sep 28, 2009 at 10:55:44PM -0500, Scott Lambert wrote:
> I'm seeing something similar to OP, apparent keyboard buffer delays, but
> maybe not exactly.  When I click from one xterm to another, it may be
> 1 - 30 seconds before my key entries show.  Firefox seems to have less
> delay after clicks into text fields, but sometimes it is noticeable maybe
> 0.25 to 1 second.  Just two xterms, the fluxbox toolbar, and firefox
> running.  No frufru stuff.
>
> I've tried with and without an explicit xorg.conf.  Switching
> back to the console works better without.  With doesn't leave me a
> usable display outside of X.
>
> It seems like the delays get longer and longer the longer the X session
> has been up.  But sometimes there will be no delay.  If I switch
> windows/desktops with alt-tab, ctrl-f#, there is no delay.  I've been
> wondering if it could be due to the synaptics touchpad.  I enabled the
> synaptics features about the same time to try to get rid of tap events
> from the touchpad.  I hate touchpads and still haven't figured out how
> to kill tapping.

I changed /boot/loader.conf from:

hw.psm.synaptics_support=1

to

hw.psm.synaptics_support=0

and rebooted.  All X11 input buffer lag went away for me.

Wild.  Unfortunately the touchpad is now more prone to palm taps...

-- 
Scott Lambert                    KC5MLE                       Unix SysAdmin
lambert at lambertfam.org