export display from MAC
 

Hi,
I am trying to run matlab on a remote mac through my laptop at home, which is a linux-based. I am not able to export the display. Here are the steps I followed.

1. xhost +remotehost
2. Log into remotehost (i.e., the mac machine)
3. export DISPLAY="192.168.2.2:0.0"
4. matlab

But I get the following message,

"unable to open display 192.168.2.2:0.0"

The reason I typed in that ip address in step 3 was that is the ip listed in the "wlan0" block when I typed "ifconfig -a" on my local linux laptop.

Your help is appreciated, Thanks.

Hello,

Could you give us the full output of ifconfig -a from your machine? Also, could you verify that you are using your wireless interface instead of eth0 or such?

Cheers,

Josh

Josh, thanks for your reply. I believe I am using my wireless interface as I am not connected via an ethernet cable, if that is what you asked. I am pasting below the output from "ifconfig -a" :

On your local Linux system, type in "ps -ef | grep -i listen". If you see something like this:
then your local Linux system isn't accepting incoming connections. No matter what you type, it won't work, and will be rejected. Since all you've told us is "Linux based", you'll have to specify your distro/version, before we can help getting it TO listen. It's usually a well documented thing, though, and easily found via Google, or you can tell us here, and we can try to help.

Output from "ps -ef|grep -i listen" :

I tried remote logging into a different machine (a linux machine) and I am able to export display from that machine (view pdf files, etc.) onto my laptop. It is the mac which is giving me problems.

My linux laptop runs on Fedora 7.

Perhaps your problem is that the MAC OS X version of Matlab is not built to display it's GUI in X Windows and more generally, that Mac OS X has no X display for you access. Mac OS X does not use X. (Though is does ship with an X implementation, which allows you to ssh in to a Linux box with X forwarding enabled so you can run GUI applications on the Linux machine.)

While I don't doubt you...I've never seen such behavior.

The "-nolisten" will deny ANY requests made to the X server. Unless you remove it, I'd strongly doubt it would work, no matter what you connect to. Fedora 7 is VERY old...the latest is 14. Upgrading wouldn't be a bad idea, when you can. To get the "-nolisten" to go away, edit /etc/gdm/custom.conf, and add DisallowTCP=false to make gdm listen. If you've got iptables running/firewall in place, and you haven't explicitly unblocked port 6000 in iptables, then it's almost certainly blocked. Edit /etc/sysconfig/iptables and add this line immediately before the line that contains --reject-with icmp-host-prohibited.