I am also having this keyboard issue when going EVA, seem to have started in the last week or so. - but some keys are still responding (like remove helmet, using tools, etc) - I just can't use space, B, movement keys, or even the use of the ESC key. Some of the the toolbar buttons respond to mouse clicks, and if I have something open, like science now, it allows me to click and collect - so KSP is not crashing as far as I can see. It doesn't do it all the time, but enough to be a bit aggravating. The only way out is to ctrl-alt-del and task manage it away, hoping my last F5 save was close to where I went EVA. I have lots of mods, but only a few have updated in the last week or so, Mechjeb being one of them. There is nothing in the output log that points to anything in particular. As a test - I am going to disable mechjeb before doing an EVA - to see if that fixes the issue. If not - more troubleshooting.