how to in (and possibly other )

```
$ cat blank.xbm
blank_width 1
blank_height 1
blank_x_hot 0
blank_y_hot 0
static unsigned char blank_bits[] = {
0x00};
$ xsetroot -cursor blank.xbm blank.xbm
```

useful for media art installation. my previous hack was warping the mouse cursor to bottom right corner of the screen and hoping the single pixel visible was either transparent or matching the background; and that was obviously not robust to mouse movements afterwards...

Follow

doesn't seem to work if you login manually in lightdm, but if you wait for autologin timeout it seems to function. strange..

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