[arch-general] Slim login manager is logging everything

I'm using Slim as my login manager and it's logging absolutely everything. Things like gstreamer and alsa errors. This is making the log file huge, of the order of 8 gb when compressed. Can anyone think of a solution? I could always use the hack of putting the logfile in /tmp but I don't want to do that. /var is not on a separate partition and I'm not prepared to re-partition my system. Obviously with such large logfiles I'm getting performance issues. I'm an XFCE user so I'd like to avoid kdm and gdm. Are are there any other alternative X11 login apps other than xdm that don't depend on GNOME or KDE if I can't fix my issue with Slim? thanks, Ananda