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Want to change color depth to something like 1 or 4. With xorg.conf DefaultDepth it won't load anything other than blinking cursor if is set under 8.

startx -- -depth works with 16+ bit. Xorg -depth gives errors.

xdpyinfo outputs depths: 1, 4, 8, 15, 16, 24, 32 are supported.

Lowest I got (8bit) is inefficient as xorg uses constantly 30% cpu.

xenial, nvidia 304.131.

Tichun
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    AFAIK, modern graphic adapters droped support for modes lower then 16bit. I was looking for such accessibility solution (grayscale or monochrome) but nothing in the horizon , may be only color filters if the compositing manager support that like with Compiz it has partial grayscale (Only Unity launcher stay in color). Another not perfect solution is using themes. – user.dz Jun 28 '16 at 05:18
  • Thank you very much, although, I'm using i3wm and also filters aren't way to go for me. – Tichun Jun 28 '16 at 05:31
  • You can try Xnest also, but I do not think that you can use a depth that is not native in the real server. Tried a bit to no avail... http://askubuntu.com/a/519164/16395 . You can check the screens/depths you have available with xdpyinfo (I have only 24 and 32 planes). – Rmano Jun 28 '16 at 06:48
  • You can also check http://linux.die.net/man/1/xvfb (never used) – Rmano Jun 28 '16 at 06:54
  • Managed to set it to 8 bit with xorg.conf but only some programs work (e.g i3wm and google-chrome). tty, gedit, nautilus etc. don't work. Satisfying is that nvidia-smi shows 3mb vram usage. Will try your solutions soon. – Tichun Jun 28 '16 at 07:27

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