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Old 01-25-2012, 11:19 AM   #1
Registered: Jun 2006
Distribution: Slackware
Posts: 144

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X11 over SSH - not working


I have a server I connect to remotely using SSH.
Recently, I installed Xorg successfully. I ran startx from a KVM console and it worked like charm, everything opens fine.
The problem is with SSH. I just cannot get X11 forwarding to work properly.

I have sat up sshd_config:
AllowAgentForwarding yes
AllowTcpForwarding yes
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes
I have sat up my ssh config file (ssh clone for win32)
ForwardAgent yes
ForwardX11 yes
Also used PuTTY, sat up "Enable X11 forwardin",
and I used display id:
On PuTTY, $DISPLAY gives me localhost:10.0
On the SSH clone, no $DISPLAY exported at all.

When I SSH in, I type in xinit:
X.Org X Server 1.11.3
Release Date: 2011-12-16
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.1.5-1-ARCH x86_64
Current Operating System: Linux myhostname 3.2.1-1-ARCH #1 SMP PREEMPT Fri Jan 13 06:50:31 CET 2012 x86_64
Kernel command line: root=/dev/sda5 ro vga=792 video=matrox:vesa:440
Build Date: 17 December 2011  09:17:41AM

Current version of pixman: 0.24.2
        Before reporting problems, check
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Jan 25 12:16:27 2012
(==) Using config directory: "/etc/X11/xorg.conf.d"
(EE) MGA(0): [drm] Direct rendering only supported with G200/G400/G450/G550.
(EE) Winbond Electronics Corp Hermon USB hidmouse Device: failed to initialize for relative axes.
However, nothing appears but this text and the inability to type any command.

I'm almost crying... I can't get it to work. It's really frustrating... I read up much about it...

Since many of you know alot more about Xorg and SSH, I call for help
Any answer will be gratly appreciated.

I'm using Arch Linux.


Last edited by BlueSpirit; 01-25-2012 at 11:23 AM.
Old 01-25-2012, 11:25 AM   #2
Registered: Dec 2009
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I run X over SSH without any problems. But I don't run a complete desktop/WM over it, I don't see the need, I already have X running on the connecting machine. I just start the applications I want to use. For example, if I want to run a VM that exists on my workstation I connect with my laptop to my workstation using
ssh -Y workstation
and then launch Virtualbox with a simple
Works without problems, also with other applications.
Old 01-25-2012, 12:30 PM   #3
Registered: Jun 2006
Distribution: Slackware
Posts: 144

Original Poster
Rep: Reputation: 15
Yeah, it's really weird.
I have other infos... it seems the display localhost:10.0 is wrong...
When I run xclock, it says
Error: Can't open display: localhost:10.0
However,in sshd_config, I still see
X11DisplayOffset 10
Old 01-25-2012, 06:46 PM   #4
Registered: Jun 2006
Distribution: Slackware
Posts: 144

Original Poster
Rep: Reputation: 15
I got it...
Since I was running on Windows, I thought PuTTY/SSH would do the work of opening the windows itself and the forwarding work. That was a mistake.

To run X11 forwarding on Win32, you need an Xserver port, which is named Xming.
Run Xming and you'll be fine.

Bail out.


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