XTEST extension "not installed"

["Michael Edwards" <miedward at gmail dot com>]

I am trying to use cygwin to connect to some machines running Solaris
10 via secure shell x-forwarding and I am getting strange errors which
don't make sense to me.  When I run matlab (I get errors in other
programs, just not ones that are quite so specific) the main window
comes up, but for some functions (notably the "create new m-file"
button) I get the error:

"XTEST extension not installed on this server: Error 0"

And the xterminal locks up as well as the matlab program itself.
Closing the xterm shuts down the stalled matlab process as it should,
so thats something.  Anyway, I checked the results of xdpyinfo from
cygwin and from the solaris machine and got some results which
confused me.

> From cygwin (with the xserver running): xdpyinfo -display :0
$ xdpyinfo.exe -display :0
name of display:    :0.0
version number:    11.0
vendor string:    The Cygwin/X Project
vendor release number:    60899901
maximum request size:  16777212 bytes
motion buffer size:  256
bitmap unit, bit order, padding:    32, LSBFirst, 32
image byte order:    LSBFirst
number of supported pixmap formats:    7
supported pixmap formats:
   depth 1, bits_per_pixel 1, scanline_pad 32
   depth 4, bits_per_pixel 8, scanline_pad 32
   depth 8, bits_per_pixel 8, scanline_pad 32
   depth 15, bits_per_pixel 16, scanline_pad 32
   depth 16, bits_per_pixel 16, scanline_pad 32
   depth 24, bits_per_pixel 32, scanline_pad 32
   depth 32, bits_per_pixel 32, scanline_pad 32
keycode range:    minimum 8, maximum 255
focus:  window 0x60000e, revert to PointerRoot
number of extensions:    24
   BIG-REQUESTS
   DAMAGE
   DEC-XTRAP
   DOUBLE-BUFFER
   Extended-Visual-Information
   GLX
   LBX
   MIT-SUNDRY-NONSTANDARD
   RANDR
   RECORD
   RENDER
   SECURITY
   SGI-GLX
   SHAPE
   SYNC
   TOG-CUP
   X-Resource
   XC-APPGROUP
   XC-MISC
   XFIXES
   XFree86-Bigfont
   XInputExtension
   XKEYBOARD
   XTEST
default screen number:    0
number of screens:    1

screen #0:
 print screen:    no
 dimensions:    1920x1200 pixels (650x406 millimeters)
 resolution:    75x75 dots per inch
 depths (7):    24, 1, 4, 8, 15, 16, 32
 root window id:    0x3e
 depth of root window:    24 planes
 number of colormaps:    minimum 1, maximum 1
 default colormap:    0x20
 default number of colormap cells:    256
 preallocated pixels:    black 0, white 16777215
 options:    backing-store NO, save-unders NO
 largest cursor:    32x32
 current input event mask:    0x80004
   ButtonPressMask          SubstructureNotifyMask
 number of visuals:    4
 default visual id:  0x22
 visual:
   visual id:    0x22
   class:    TrueColor
   depth:    24 planes
   available colormap entries:    256 per subfield
   red, green, blue masks:    0xff0000, 0xff00, 0xff
   significant bits in color specification:    8 bits
 visual:
   visual id:    0x23
   class:    TrueColor
   depth:    24 planes
   available colormap entries:    256 per subfield
   red, green, blue masks:    0xff0000, 0xff00, 0xff
   significant bits in color specification:    8 bits
 visual:
   visual id:    0x24
   class:    TrueColor
   depth:    24 planes
   available colormap entries:    256 per subfield
   red, green, blue masks:    0xff0000, 0xff00, 0xff
   significant bits in color specification:    8 bits
 visual:
   visual id:    0x25
   class:    TrueColor
   depth:    24 planes
   available colormap entries:    256 per subfield
   red, green, blue masks:    0xff0000, 0xff00, 0xff
   significant bits in color specification:    8 bits

> From the solaris machine:
<snip>
number of extensions: 3
   BIG-REQUESTS
   LIBX
   XC-MISC
</snip>

Everything else is the same that I looked at.

So, from the solaris machine's point of view the XTEST module is not
available even though the cygwin x-server supports it.  Is this an
artifact of x-forwarding or is this a problem with how Solaris 10
deals with xwindows?

Thanks for any advice, I have tried to research this, but I am not
familiar with the working s of xwindows so I may have overlooked an
obvious solution.

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