ssh -X works on 8.7 image but not on 9.5 (Stretch) image

[mugginsac]

If I boot the 8.7 image with machinekit I can start linuxcnc or stepconf with ssh -X machi...@beaglebone.local. However, when I try to start linuxcnc or machinekit after logging in with ssh -X machi...@beaglebone.local on the 9.5 (Stretch) image, I get the following error (same error whether I type linuxcnc or machinekit).

-------------------------------------------------------------------

MACHINEKIT - 0.1

application-specific initialization failed: no display name and no $DISPLAY environment variable
Error in startup script: invalid command name "image"
    while executing
"image create photo -file $f/$i.gif"
    invoked from within
"if [file exists $f/$i.gif] {
            return [image create photo -file $f/$i.gif]
        }"
    (procedure "linuxcnc::image_search" line 7)
    invoked from within
"linuxcnc::image_search machinekit-wizard"
    invoked from within
"set logo [linuxcnc::image_search machinekit-wizard]"
    (file "/usr/lib/tcltk/linuxcnc/bin/pickconfig.tcl" line 31)

-------------------------------------------------------------------------

Since it works under Jessie and not under Stretch, it seems to me that the change must either have something to do with changes made in  either in machinekit or in Stretch. Anyway help would be appreciated.

Alan

[schoo...@gmail.com]

We don't make the images.

It is either because the host or client ( or both ) does not have an X server or the address of it is not forwarded.

You cannot run an X gui where the host image is headless with no X-org installed and the client is a windoze box without it either, for example.

Some of the ssh defaults changed in Stretch and have to be specifically enabled to work.

There is lots of info on the net.
For example this
https://unix.stackexchange.com/questions/12755/how-to-forward-x-over-ssh-to-run-graphics-applications-remotely

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[Alan Condit]

I forgot to add I am running ssh from my Mac. Since it works from my Mac to the Jessie 8.7 setup I know my Mac has what it needs in general. So, it is just a question of what I need to add to or change on the Stretch 9.5 setup.

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[schoo...@gmail.com]

Suggest you look at the image and see if it has an X server for a start

Your mac doesn't unless you have installed some special emulator.

[Condit Alan]

Schooner,

That is the kind of info I was looking for. I have done a bunch of googling and have seen a whole bunch of generalized info about other linux strains, but very little specifically about Debian Stretch. I saw something about installing OpenSSH and related server on Stretch but I didn’t know if anyone else had solved this problem and might have specific info about what is needed to make ssh -X work with machinekit on Stretch.

Once this problem is solved would it be feasible for Robert Nelson to add the fix to the Stretch image?

Thanks,

Alan

[schoo...@gmail.com]

https://unix.stackexchange.com/questions/314862/minimal-no-hassle-debian-install-with-functioning-x11-login-etc

`apt install xorg` and install a minimal display and window manager for it to work properly.

The response to `apt install xorg` will tell you if the problem is that it is missing.

[Condit Alan]

Schooner,

machinekit@beaglebone:~$ sudo apt install xorg

Reading package lists... Done

Building dependency tree       

Reading state information... Done

E: Unable to locate package xorg

I guess that is the answer. Xorg is missing. If I had a desktop I would use synaptic package manager to fetch and install everything needed. With just a login through terminal how do I locate, download and install what is needed?

Thanks,

Alan

[schoo...@gmail.com]

On 30/08/18 17:26, Condit Alan wrote:

Schooner,

machinekit@beaglebone:~$ sudo apt install xorg

Reading package lists... Done

Building dependency tree       

Reading state information... Done

E: Unable to locate package xorg

I guess that is the answer. Xorg is missing.

No, it is telling you rubbish - saying that a package xorg does not exist in the repositories, which it does
https://packages.debian.org/stretch/xorg

You need to make sure /etc/apt/sources.list is up to date
run 'apt update' then try again.

The result you should get if it is installed is

$ apt install xorg

Building dependency tree      
Reading state information... Done

xorg is already the newest version (1:7.7+19).
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

Ignore the version, I am running sid.

[Condit Alan]

I updated /etc/apt/sources.list and that didn’t make any difference for me. 

However, I downloaded xorg_7.7+19_armhf.deb and ran the following commands:

sudo dpkg -i xorg_7.7+19_armhf.deb

sudo apt-get install xorg

 (This resulted in a number of errors)

sudo apt-get update

sudo apt-get install -f

logout

Maybe if I had just ran "sudo apt update” it would have worked. I may try that on another uSD.

Anyway I have ssh -X working now. I have another problem but I’ll start a new thread for it.

Thanks,

Alan

[Paulo Sherring]

Hi! Don't know if it is relevant by now, but, I had this issue some time ago and I was missing Xauth and a .Xauthority file on my profile.

To repair it, I ran:

sudo apt-get install xauth

touch ~./Xauthority

Then, endded ssh session and started a new one.

Everything worked as expected after that.

PS.