http://sourceforge.net/projects/virtualgl/files/VirtualGL/2.2.1/
Significant changes since 2.2:
[1] A 64-bit version of the VirtualGL Client for Exceed is now fully
supported.
[2] Fixed a severe readback performance problem that occurred whenever
an application set the render mode to GL_SELECT and called g...lFlush()
while doing front buffer rendering.
[3] vglserver_config will now work properly whenever vglgenkey is
installed in a directory other than /usr/bin or /opt/VirtualGL/bin, as
long as vglgenkey is installed in the same directory as vglserver_config.
[4] vglconnect now allows the user to specify the directory in which
VirtualGL binaries are installed on the server, rather than always
assuming that they are in /opt/VirtualGL/bin.
[5] Fixed issues with vglconnect.bat that occurred when it was installed
under c:\Program Files (x86) on 64-bit Windows systems and invoked with
the -x or -s options.
[6] Clarified the documentation of the VGL_DISPLAY option and documented
how to use VirtualGL with multiple graphics cards.
[7] VirtualGL will no longer die if glXDestroyContext() is passed a NULL
argument.
[8] Fixed a BadWindow error that would occur whenever a 3D application
attempted to call glXSwapIntervalSGI() (specifically, this was observed
when running Direct3D applications using WINE 1.3.11 or later.) The
nVidia GLX implementation requires that a window be current (not a
Pbuffer) when calling glXSwapIntervalSGI(), so VirtualGL now interposes
that function and makes it a noop.
[9] Fixed an issue whereby, if a 3D application set
GL_{RED|GREEN|BLUE|ALPHA}_SCALE or GL_{RED|GREEN|BLUE|ALPHA}_BIAS to
non-default values, the colors would appear wrong when running the
application in VirtualGL, and the readback performance would be very slow.
[10] Fixed an issue whereby 3D applications that requested an overlay
visual would fail with BadRequest or other X11 errors if the 2D X Server
lacked GLX support (as is the case with TurboVNC.) This was caused by
the fact that VirtualGL passes through glXChooseVisual() and related
calls to the 2D X Server if it detects that an overlay visual is being
requested. Now, VirtualGL will first check that the 2D X Server supports
GLX before passing through those calls.
[11] vglclient -kill and vglclient -killall now work (again) in the
Exceed client.
Packaging changes:
[1] Building against libjpeg-turbo 1.1.1 pre-release, which fixes visual
artifacts in JPEG quality levels 98 or higher, visual artifacts in
grayscale JPEG compression caused by a typo in the RGB-to-luminance
lookup tables, and a 1-pixel error in row 0, column 21 of the luminance
plane generated by the YUV encoder (which is used in VirtualGL's YUV and
XV transports.)
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