On Mon, Jul 23, 2018 at 12:00:19PM -0400, Gene Heskett wrote: > First I am logging in as user 1000, aka pi on the pi and rock64 on the > rock64. Root logins are disallowed. I can sudo later, but can't run > anything that needs x, getting the can't open display :11 or some such > twaddle error. And I've no clue if ts this wheezy machine, or that > jessie or stretch machine reporting the error I see on my konsole here > on wheezy.
Once you su or sudo you no longer have permission to access X. If you want that use gksudo or kdesudo which handle keeping access to X while switching to root. -- Len Sorensen