Matthew Gillen wrote:
Also, does 'xhost +' solve the problem? (distasteful as it might be to
use a sledgehammer)

I had to use xhost in order to allow remote OpenCL access on a Scientific Linux host a while back since remote logins can't access the hardware directly. It might be a sledge hammer but for once it was an appropriate tool.

If you use xhost I suggest the following ACL syntax:

  xhost +SI:localuser:${USER}

This restricts access to that user as far as the server can tell (SI = "server interpreted"). Disable the ACL with:

  xhost -SI:localuser:${USER}

--
Rich P.
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