Opening a terminal other than xterm, running a command on it, and not closing the terminal after it successfully finished

I have the following script in my Arch Linux box: #!/bin/bash xterm -e "sudo pacman -Syu;bash" This will fire up an xterm and run the command sudo pacman -Syu on it. Because of the ;bash part, it will not close the xterm window once the command is finished. This is a command for updating my system and I don't want it to close because I'd like to see the output. Why this will not work with other terminals, and in particular with lxterminal and roxterm (the only others I tried)? The exact same command with lxterminal or roxterm instead of xterm will fire up the terminal and close it immediately after the command is executed.