Thursday, March 06, 2008

Gdk-WARNING **: Connection to display localhost:10.0 appears to be untrusted

Have you ever had problems running X applications over ssh that did not involve issues with xauth. Here is a tip I found after getting error like this:
Connection to display localhost:10.0 appears to be untrusted. Pointer and keyboard grabs and inter-client communication may not work as expected.
or
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
So, instead of simply using "ssh -X user@host", try using "ssh -2 -C -Y user@host" instead.

-2 Forces ssh to try protocol version 2 only.
-C Requests compression of all data ... which can be desirable in low bandwidth situations.
-Y Enables trusted X11 forwarding.

Using -Y is what got rid of the warning and subsequent functionality issue with the X application. But the compression helped speed things up quite a bit also.

Even with these new command line parameters I still get the warning:
Warning: No xauth data; using fake authentication data for X11 forwarding.
Anyone know what the issue there is?

Anyway, I hope that helps you as much as it did me.
at

11 comments:

  1. UnknownFriday, March 07, 2008

    Thanks for the update. I've been wondering about how to resolve that problem.
    Dad
    lol

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  2. AnonymousWednesday, October 08, 2008

    Thanks, Vernon. I just started using Puppy 4.1 on my laptop to SSH to my Puppy 3.01 desktop at home. I had no difficulty using 3.01 on my laptop, and initially thought it was a Gtk problem.

    I found that I needed only the -Y option, but the compression is welcome also.

    Spanky

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  3. Dru JensenWednesday, October 08, 2008

    Thanks for the post!

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  4. eivindglWednesday, February 11, 2009

    Thanks, amazing, everything is much more responsive now. ..

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  5. AnonymousThursday, March 05, 2009

    Fantastic! This worked perfectly for me and resolved my lag issue as well.

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  6. AnonymousSaturday, March 21, 2009

    Thanks for advice,
    it works
    still I see the same message " No xauth data; using fake authentication data"
    I'm waiting for your solution:)

    ReplyDelete
  7. Scott HeaberlinTuesday, March 31, 2009

    Thanks for this!

    Even on an intranet the -C sped up X11 forwarding tremendously for me; even cleared up some odd window rendering behavior (huge space between gnome menu and window content area, etc) on my mac client to ubuntu server setup.

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  8. AnonymousTuesday, May 12, 2009

    Thanks, this solved a BadAtom problem with remotely started firefox.

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  9. NaffWednesday, May 20, 2009

    Thanks dude, made working from home a lot more comfortable. Emacs doesn't crash on me any more. woooo!

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  10. AnonymousThursday, April 22, 2010

    Thanks for sharing dude. I was having a problem loading wireshark, it was taking too long to load the dissectors. Your tip snapped it up.

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  11. AnonymousMonday, March 21, 2011

    Thanks!!! That was exactly my problem. Wonder why it happens to begin with, as ssh -X works fine usually...

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