Disappearing mouse

I recently installed Mageia 6 and have a problem where the mouse disappears in lower than maximum resolutions when the mouse it moved to the right edge of the screen
The monitor is 1900x1050 which is how the installation boots by default. I changed that to a resolution to be able to see better. Now if I move the mouse -- with either th touch pad, the TrackPoint button or an external, USB mouse -- to the right edge of the screen, the mouse disappears and does not come back. This does not happen for any other edge.
The first times this happened, I used the keyboard to log out and when I logged back in the mouse re-appeared.
At some point I tried running the screen in 1920x1080 and found that the problem does not happen. With the display resolution dialog open, I changed to a different resolution (I tried several and had the same behavior with each). I moved the mouse to the right edge and it disappeared. No amount of moving the nouse aroud brought it back. I used the keyboard to switch to the display resolution dialog and changed the resolution back to 1920x1080 -- lo and behold my mouse was back. I repetaed this several times with different resolutions, always finding that I could get the mouse back by switching the resolution back to 1920x1080.
My computer is a 2014 lenovo W540 with an AU Optronics 15" display.
In the Mageia Control Center, the Mouse is listed as
SnPS/2 Synaptics TouchPad
TPPS/2 IBM TrackPoint
(This problem also happens with the TrackPoint button.)
The monitor is 1900x1050 which is how the installation boots by default. I changed that to a resolution to be able to see better. Now if I move the mouse -- with either th touch pad, the TrackPoint button or an external, USB mouse -- to the right edge of the screen, the mouse disappears and does not come back. This does not happen for any other edge.
The first times this happened, I used the keyboard to log out and when I logged back in the mouse re-appeared.
At some point I tried running the screen in 1920x1080 and found that the problem does not happen. With the display resolution dialog open, I changed to a different resolution (I tried several and had the same behavior with each). I moved the mouse to the right edge and it disappeared. No amount of moving the nouse aroud brought it back. I used the keyboard to switch to the display resolution dialog and changed the resolution back to 1920x1080 -- lo and behold my mouse was back. I repetaed this several times with different resolutions, always finding that I could get the mouse back by switching the resolution back to 1920x1080.
My computer is a 2014 lenovo W540 with an AU Optronics 15" display.
In the Mageia Control Center, the Mouse is listed as
SnPS/2 Synaptics TouchPad
TPPS/2 IBM TrackPoint
(This problem also happens with the TrackPoint button.)