xorg - Ubuntu 16.04 - Dark patch on monitor (disappears on reboot) - Ask Ubuntu


this has been happening while. afaicr, didn't happen before upgraded 14.04 16.04.

i using computer while, , i'll notice dark patch stays in same location on screen. lloks 'burnt' patch on crt monitor.

the way can rid of reboot computer.

the location of dark patch in different location, , has different size, each time appears. rectangle.

i have never noticed window of same size , in same location.

i attach screenshot - didn't know until looked @ screenshot whether dark patch appear on screenshot. dark patch in screenshot appears superimposed on text below search text entry field.

while fiddling around switching between windows while getting , looking @ screenshot, , entering text here @ askubuntu, noticed dark patch no longer there, , didn't have reboot.

screenshot of dark patch

on further reflection, , due did, think might happening when shift-prtscr screenshot of something, , navigate window (eg. having used copy clipboard in order paste screenshot application).

the dark rectangle represents area captured in screenshot in 1 application window, , remains in foreground on monitor long prtscr window still open.

that's caused happen now, anyway.


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