Aivils Stoss has a work-around for this problem: install faketty and use its VT's on seat 2: http://en.wikibooks.org/wiki/Multiseat_Configuration/faketty
Except the version attached of faketty has to be used. 1. compile and install faketty 2. install xserver-xorg-input-kbd 3. modify xorg.conf for seat2 to use driver=kbd 4. modify gdm.conf for seat 2 to say: command=/usr/bin/X0 :1 -layout X0 -dpi 110 -isolateDevice PCI:0:8:0 vt51 Note the 'vt51' in step 4. Result: problem goes away. Thanks Aivils!
faketty-2.6.29.tar.bz2
Description: BZip2 compressed data