Red Hat Bugzilla – Bug 129620
X clients have X protocol errors when connecting to X-org server through openssh
Last modified: 2007-11-30 17:10:47 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7)
Description of problem:
X clients have protocol errors and cannot connect to a remote X-org
X11 6.7.0-7.2 server through openssh. This might be a bug in gdk
because pure Xaw clients connect fine, however the Xaw clients won't
work with Xclipboard copy/paste and sometimes crash at a later time
with bad X events.
[thayne@tubarao ~]$ ssh blaze
Last login: Tue Aug 10 16:26:23 2004 from tubarao.lnxi.com
[thayne@blaze thayne]$ ethereal
The program 'ethereal' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadAtom (invalid Atom parameter)'.
(Details: serial 10 error_code 5 request_code 18 minor_code 0)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the --sync command line
option to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error()
This happens with many more programs than ethereal. It doesn't seem
to be a problem with the X client side (it can be any
distribution/release) - only with the X server side being the one in
Fedora core development.
You can start up a remote X GNU Emacs and won't be able to paste into
it from X server-side clipboard.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. ssh to remote machine
2. start gnome-terminal, ethereal, various programs
3. observe X protocol errors
Actual Results: [thayne@tubarao ~]$ ssh blaze
Last login: Tue Aug 10 16:38:21 2004 from tubarao.lnxi.com
[thayne@blaze thayne]$ gnome-terminal
Gdk-ERROR **: BadAtom (invalid Atom parameter)
serial 39 error_code 5 request_code 18 minor_code 0
Gdk-ERROR **: BadAccess (attempt to access private resource denied)
serial 50 error_code 10 request_code 102 minor_code 0
Expected Results: A nice gnome-terminal in my X server.
You may want to try turning off X security in SSH.
I'm not sure what you mean by "X security in SSH." Are you referring
to X11Forwarding? If so, then that is enabled. If it wasn't enabled
then *nothing* could connect to the remote X server (I mentioned that
some pure Xaw programs worked fine but didn't work with Xclipboard).
Using current rawhide (openssh-3.9p1-3, xorg-x11-126.96.36.1993-5,
When I try running ethereal (the test case), with X11Forwarding (ssh
-X localhost) I receive the same errors that Thayne saw.
Interestingly, when I use ssh -Y localhost, instead, everything works
I can confirm this for FC3 final and nedit
(and some other other programs):
..$ ssh -X host nedit
NEdit: Converting .nedit file to 5.4 version.
To keep, use Preferences -> Save Defaults
X Error of failed request: BadAtom (invalid Atom parameter)
Major opcode of failed request: 20 (X_GetProperty)
Atom id in failed request: 0x69
Serial number of failed request: 20
Current serial number in output stream: 20
while "ssh -Y host nedit" works!
...$ rpm -q xorg-x11 openssh nedit
This isn't a bug at all. openssh changed the way it works, and you
must now invoke it as "ssh -Y" in order to get the same level of
X11 forwarding that "ssh -X" did in previous releases of openssh.
Reassigning to the openssh component for any final comments.
Yep, "ssh -Y" fixes it. I wish Bill Nottingham had clarified his
comment from 2004-08-11.