from https://linux.die.net/man/1/xrefresh:kiramm wrote:thank u very much for clear aswer
i just havent got clear for which problems or needs is this aplication
in case of freezing of pc ?or browser?
i had a process interfere with another process. using xrefresh seemed to have fixed it (something in Iron browser was preventing a save2flash command from getting through, and i guess a re-send or refresh was all it took to clear the path for it? (my familiarity with this program is comprised of a few minutes here and there over the past few days, and my experience with linux isn't much either: about four years or so of using puppy coming from windows)).xrefresh(1) - Linux man page
Name
xrefresh - refresh all or part of an X screen
Synopsis
xrefresh [-option ...]
Description
Xrefresh is a simple X program that causes all or part of your screen to be repainted. This is useful when system messages have messed up your screen. Xrefresh maps a window on top of the desired area of the screen and then immediately unmaps it, causing refresh events to be sent to all applications. By default, a window with no background is used, causing all applications to repaint ''smoothly.'' However, the various options can be used to indicate that a solid background (of any color) or the root window background should be used instead.
it's no sure fix for All That Would Cause You To Restart Your Computer (or X) by any means, but it may be worth a shot before you give up all hope on a session.
hth