Laggy X11 after updating to 8.0-RC1

Scott Lambert lambert at
Tue Sep 29 03:55:45 UTC 2009

On Mon, Sep 28, 2009 at 07:29:46PM -0600, Warren Block wrote:
> On Tue, 29 Sep 2009, Rohit Grover wrote:
> >
> >On Tue, Sep 29, 2009 at 7:30 AM, Warren Block <wblock at> wrote:
> >>On Tue, 29 Sep 2009, Rohit Grover wrote:
> >>
> >>>I have upgraded to 8.0-RC1 (from 7.2-STABLE) on my MacBook 4,1. I
> >>>did so by checking out stable/8 under /usr/src, rebuilding
> >>>kernel/world, and using portupgrade to update all installed ports
> >>>from packages available on the 8.0RC1 DVD-iso.
> >>>
> >>>Since the update, my X11 is laggy. Now, I often have to move the
> >>>mouse before keystrokes/button presses take effect.
> >>
> >>Make sure hal and dbus are enabled in rc.conf and running.  In
> >>xorg.conf, remove Option "AllowEmptyInput" "off".
> >>
> >>A bonus of using hal is that you can remove the keyboard and mouse
> >>sections from xorg.conf.
> >>
> >>>As I've mentioned, I've updated the kernel/world, and updated
> >>>libpciaccess. Perhaps I'm having issues because I need to remove
> >>>old libs. How do I remove old libs?
> >>
> >>cd /usr/src make check-old-libs make delete-old-libs
> >
> >
> >I deleted old libs using 'make delete-old-libs' from /usr/src,
> >but that has led to many other problems.  It seems many libraries
> >currently in use were deleted in the process.  I'm having to
> >rebuild/reinstall many of my applications to get them working again.

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 haven't had time to systematically try to narrow down the actual

Wiggling the mouse, hitting various keys all seemed like they helped
at one time or another, but I think I was just trying things until the
buffer released.  If I leave it alone, the delays seem to be of about
the same length as when I'm trying random things to break it loose.

Only clicking in a window (particularly an xterm) seems to stall the
keyboard buffer.  Just wiggling the mouse above or around the focused
window is no problem.  Clicks take effect immediately.  I can drag
the window by the title bar or resize the window without stalling the
keyboard buffer.

I haven't lost a key press that I've noticed.  Now I just type blind
until it catches up or I actually need to see the results of my typing.

Oh, it seems like if there is something in the xterm which can use the
mouse input, it may not be stalling the keyboard buffer.  I need to
watch that more closely.

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.

agp0: <Intel GM965 SVGA controller> on vgapci0

I've done the delete-old stuff and got mad at KDE4 and did a pkg_delete
-a in a fit of rage.  I went back with fluxbox, took about 2 to 3 hours
to compile everything from source to have my multiple xterms back.
Firefox took another 2 hours.  But I was able to *work* while that

I was running FreeBSD 8-CURRENT pre-beta cycle.  KDE4 was giving me so
many fits that I would just run Windows instead so I could get work
done, sad.  I don't know if I would have noticed an input buffer delay
before I upgraded to BETA2 and replaced KDE with fluxbox.  I just
couldn't stand to spend that much time in X.  Windows finally annoyed me
enough to try something different (fluxbox).  This problem has been with
me through the BETAs and now into RC1, as far as I can remember.  I've
been busy and trying really hard to ignore workstation issues to get
work done ever since my PowerBook died.

> When upgrading from one major release of FreeBSD to another, the 
> standard recommendation is to delete all installed applications 
> (pkg_delete -a) and then reinstall everything.  There may be some 
> incantation of portupgrade or portmaster that will do it.  pkg_libchk 
> from sysutils/bsdadminscripts may help.  But that is likely to take 
> longer than just pkg_delete -a and reinstalling applications.

portmaster's man page suggests pkg_delete -a.  It has explicit
instructions so you don't miss anything putting them back on.  Not
that I've used the instructions yet.  Rage is not condusive to reading
Scott Lambert                    KC5MLE                       Unix SysAdmin
lambert at

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