Xorg Input Hotplugging

David Sharp whereami at gmail.com
Mon Oct 15 20:59:35 PDT 2007

Hi Ben. I'm glad you've had success getting input hotplug to work.
I've had none.

Would you mind writing down the steps you took to configure X, dbus,
hal, and anything else you think is relevant? wiki.x.org might be a
good place for it, if you can. If not, if you email it to the list,
someone might put it up for you.

My situation is a bit different, in that I'm trying to run the MPX
server, and I'm trying to install it in a prefix other than /usr

What I've done (configuration wise)
 - added /opt/mpx/lib to ld.so.conf
 - /opt/mpx/etc/X11/mpx.xorg.conf has zero input configuration
 - I put x11-input.fdi in /etc/hal/fdi
 - the server install put xorg-server.conf in /opt/mpx/etc/dbus-1/system.d
 - I added a /etc/dbus-1/system-local.conf:
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 - I've written a startup script that exports LD_LIBRARY_PATH and
LD_RUN_PATH and runs:
startx ssh-agent dbus-launch --exit-with-session /opt/mpx/mpwm --
/opt/mpx/bin/Xorg :0 -config mpx.xorg.conf

This results in a server with no input devices... I have to kill X to
get back to console.

Thanks for any help!

On 10/15/07, Ben Gamari <ben at mw0.ath.cx> wrote:
> I'll look in Xorg.0.log.old next time it segfaults on me, thanks!
> - Ben
> On Tue, 2007-10-16 at 00:10 +0300, Daniel Stone wrote:
> > On Mon, Oct 15, 2007 at 04:50:54PM -0400, Ben Gamari wrote:
> > > First, I have occasionally experienced Xorg seg faults when removing
> > > input devices. Any suggestions as to how to collect debugging
> > > information about these incidents as they are relatively sporadic
> > > (constantly run X in gdb locally, run xorg in gdb over ssh, anyone know
> > > where gdm puts its xorg coredumps?)?
> >
> > Hmm, interesting.  Xorg.0.log.old should contain a backtrace, but I
> > don't think coredumps get generated.
> >
> > > Secondly, anyone have any ideas as to why key repeats (typematic) would
> > > work with all of the arrow keys except the left? Thanks,
> >
> > At a guess, your desktop environment explicitly disabling it due to
> > incorrect mappings (e.g. 'ooh, that's print screen, don't want that
> > repeating').
> >
> > > P.S. Daniel, you were right about the desktop environment resetting the
> > > keyboard model. Changing it in gnome keyboard preferences fixed the
> > > problem for the most part (see above). Also, I think the xkbcomp error
> > > might be caused by the libX11 version (the latest release) which doesn't
> > > have commit 7c996f78914c77fe17e9f4feede980d895d9df51 which adds the new
> > > keysyms. Might be time for a new push of libX11. Just a thought though.
> >
> > Ah, that too.  I have a fix for this for good, just need to sort it out.
> >
> > Cheers,
> > Daniel
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