I had severe jumping of WORD when driving two monitors off my laptop. (At home, it had been jumping only on (R) external monitor when driving
two DVI monitors off a dock, in another office, it was jumping on both L and R external monitor off the X1's DVI port (with DVI HDMI cable) and X1 HDMI port (with HDMI HDMI cable).
I noticed jumping stopped if I was driving only 1 external monitor so I wondered if it was an overloading problem with an irregular
fault.
Did this stuff and it went away. (I had to figure out to keep clicking deep enough inside various submenus then I did hit a video driver
that was updateable). I'm not sure which worked: (A) slowing the FPS or (B) the driver update. I guess I could reset monitors back upwards to 59 fps and see if the problem came back.
20170911:
Suffered: Severe jumping in OFFICE when driving two monitors of Lenovo X1 Gen4.
Noticed: No jumping in OFFICE when only using 1 external monitor (other unplugged)
Desktop > Rightclick > Display Settings
Pick one of the 2 or 3 monitors
Scroll to bottom to: Display adapter properties
See Popup box
MONITOR TAB: Set from 59 fps to slower 50 fps
ADAPTER TAB: Properties (see a 2nd popup), then Driver tab, then click Update (slow)
In my case u pdated to: 8/13/2017, Intel HD 520 Driver, 22.20.16.4771.
This updated the driver apparently used for all 3 monitors, internal and the two externals. They all show they are using the same
Intel .4771 driver.