January 7, 2020 at 11:55 #25115
I’m currently evaluating using NoMachine to enable our Windows 10 laptops to access a Linux GNOME VM environment, and I’m finding a small but irritating delay between keyboard/mouse input and selection, and the display.
Are there any tweaks I can apply to make it more usable?
ThanksJanuary 7, 2020 at 15:53 #25128
Is direct rendering On in the virtual desktop? Please verify with command
glxinfo | grep -i render.January 7, 2020 at 17:12 #25129
yes it is,
bash-4.2$ glxinfo | grep -i rendering
direct rendering: Yes
is this good or bad??January 7, 2020 at 17:43 #25139
It is good. What about “renderer” in the output from glxinfo (
glxinfo | grep -i renderer)? Please be sure you issue the command remotely through NoMachine.
How are DISPLAY vars set? Please run
env | grep DISP
Would you verify the kind of NoMachine session? With NoMachine connected to the remote host, press combo Ctrl+Alt+0 and chose Connection information; look at “session type”.
If the type is “virtual desktop” you can try to turn off X11VectorGraphics; in node.cfg, place:
AgentX11VectorGraphics 0. See also this (applies only to virtual desktop session type): https://www.nomachine.com/AR02L00779January 8, 2020 at 16:00 #25153
Thanks for the response. Below is the more noisy output from glxinfo:-
nx-host$ glxinfo | grep -i render
direct rendering: Yes
GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, GLX_MESA_query_renderer,
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: llvmpipe (LLVM 7.0, 256 bits)
GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_fog_distance,
DISPLAY is set to this:-
nx-host$ env|grep DISP
The session type is “physical server” but how would I change this to virtual? Is this available in the free version?January 13, 2020 at 10:34 #25210
Physical is OK: AgentX11VectorGraphics 0 is implicit in that case. Switching to “virtual” would not provide any leverage. If you want to try it anyway, just turn off Gdm display manager (systemctl stop display-manager): on the next try NoMachine will ask you if you want to create a virtual display server.
In my opinion, VM has not support for video acceleration (OpenGL renderer is llvmpipe, that is CPU renderer) so you get poor gnome performance. Would you consider a more lightweight desktop like Xfce? Otherwise you could try providing more CPU power to the VM in order to get a faster rendering by llvmpipe.
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