X11 Forwarding

[Robert Leacroft]

Hi,  I cannot access the A10S (Debian on SD card) with X11 forwarding from an XP PC.  The same PC can happily access Raspberry Pi, Cudieboard (A10) and BBB (yes I have tried them all before settling on Olimex) with X11 forwarding   but the A10S just reports   "Can't open display" when I try Xlogo or anything else with Putty and Xming.  Normal Putty SSH is fine.   

The sshd_config  files in the A10 and A10S appear identical with X11 Forwarding set to Yes. Xauth all installed. I am running out of things to check;  does anyone have any ideas please or has anyone else got X11 forwarding already working? Is something missing from the Debian image?

Robert

[spanner]

Hi did you figure out what was wrong as i have just began playing about with my A10
also running the default debian image.
Presently trying to get the hdmi screen correct with my monitor ( TV with hdmi ) good picture but irritating overscan.
Using the debug serial port i can login and do some things but terminal does not work well. but that might be gtkterm into a usb-serial chip.
login in over the network can edit files fine as the term works correctly.
but i am used to being able to just do ->ssh -X2 some-machine<- and being able to run X programs.
But have not yet sussed the cant open display problem yet.
Span

[Robert Leacroft]

Hi Span,

I tracked it down to the fact that the local loopback port on the Olimex was disabled by default in the Debian image (just like ETH0 see another thread). I added (or uncommented) the lines

auto lo
iface lo inet loopback

in the   /etc/network/interfaces      file  and it all started to work. I had read about needing local loopback for X11 but had understood  this as being needed on the client end and not the server end. Every other board I had ever used already had local loopback enabled by default hence all others worked OK.

Robert