Comment 29 for bug 1304067

Also experiencing this odd bug on a Dell XPS 13 9350 with an external monitor. My built-in display is 1920x1080, but my external monitor is a 4K 27" display (3840x2160). When I am experiencing the issue, the mouse pointer is just abnormally huge on both screens, *unless* the pointer is in a particular app, like Firefox.

The solution for me is not to power on the computer with the external display connected. If I power on the computer, get to the log in screen, and attach the external display at this point, then when I log in, everything is normal--I have a pointer that is an acceptable size, and it stays the same size no matter which monitor it's on or which app it's in. I haven't figured out what happens yet if I attach the external display after logging in.