Another possibility would be to execute a command that moves the mouse way off screen?
https://unix.stackexchange.com/questions/164262/can-i-simulate-mouse-movements-via-terminal-without-xdotool On Fri, Jul 14, 2017 at 5:26 AM, Annette Wilson <clockworksa...@gmail.com> wrote: > Hi, I'm not able to follow along as I don't have a Pi, but since I see > attempts to dissect the behaviour of the SDL code via strace, I > thought it worth pointing out that this source code is available and > need not be treated as a complete black box. You can download it from > the SDL site. My links below are to an unofficial copy that somebody > has uploaded to github, but seems to be match the download version. > > FB_OpenKeyboard in SDL_fbevents[1] is called unconditionally during > Framebuffer video initialization.[2] You can see there that *most* of > the logic to find a keyboard device is guarded by a check that > geteuid() == 0. (I.e. that the user is root.) The only fallback for > when not root is to try to open /dev/tty. If it fails to find a > keyboard device it can use it aborts. I hope that helps back up what > has been gleaned from the strace and maybe gives some clues. > > [1] - https://github.com/infertux/SDL-1.2.7/blob/master/src/ > video/fbcon/SDL_fbevents.c#L246 > [2] - https://github.com/infertux/SDL-1.2.7/blob/master/src/ > video/fbcon/SDL_fbvideo.c#L531 > > On 13 July 2017 at 21:22, Martin Kühne <mysat...@gmail.com> wrote: > > Sorry everyone for the confusion, as was mentioned, two of my previous > > emails was sent off-list for whatever reason. > > I read up on the topic arriving at the SE thread that was linked > > before [0] and tried to figure out the problem based on the work with > > strace, which I commended as very through and well-conceived. I also > > asked Roman to tell me whether group membership in `tty` would help, > > which own the files in /dev on my system. Also Roman, please note that > > many ioctls return data in pointers that can be passed to them which > > should be the spot where your results actually differ. > > > > cheers! > > mar77i > > > > [0] https://unix.stackexchange.com/questions/117981/what-are- > the-responsibilities-of-each-pseudo-terminal-pty-component-software. >
