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Re: Two computers in one: two users each with their own accounts, monitor, and keyboard?

Boyd Stephen Smith Jr. put forth on 1/12/2010 11:41 AM:
> On Monday 11 January 2010 23:45:12 Stan Hoeppner wrote:
>> Boyd Stephen Smith Jr. put forth on 1/11/2010 12:23 PM:
>>> 4.  I had to switch VTs to the X server that was handling the OpenGL
>>> commands for the GLX calls to complete.  Likely, the video driver I am
>>> using requires exclusive access to the hardware to process some GLX
>>> requests.
>> This is my point.  The Linux OpenGL architecture has been optimized for
>>  local hardware rendering.  It's impossible to get "usable" remote OpenGL
>>  today, mainly because textures are such an integral component of 3D
>>  rendering today.  Trying to push texture data over ethernet (even GigE)
>>  for real time rendering is not really doable.
> That's not due to any Linux (kernel) limitation that "multiuser 3D OpenGL 
> would no longer be supported" and a far cry from having "to eliminate over the 
> network OpenGL completely".[1]
> It takes time to push data across the network -- always has.  In fact, network 
> speed on (on average) faster today than when SGI or SUN workstations were big 
> sellers.  While an apples-to-apples comparison is probably impossible, I'd 
> wager that using GLX on a remote X session is actually faster now than "back 
> in '02 or '03" or even the SGI workstations.
> Multi-pass rendering of a scene with 1G of textures and several megs of 
> compiled shader programs in 1/60th of a second is tough, but if your X server 
> hardware is good enough, your bands wide enough, and your round-trip times low 
> enough, standard Xorg will do it without missing a beat.
> [1] If you don't recognize the quotes, they are from your earlier messages in 
> this thread.

I recognize it.  As a test of your theory, fire up your favorite ID Software
OpenGL Linux game on one Debian PC piping its GL calls over the network to
another PC's X server.  Run the game at 640x480x16bpp windowed.  Le me know how
this works, or doesn't, and what errors you generate.  Also report how many
hours/days you spend troubleshooting it to make it work. ;)


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