*** This bug is a duplicate of bug 1911055 ***
https://bugs.launchpad.net/bugs/1911055
This bug was discovered as duplicate - the issue persisted while the P50
was suspended & resumed while in a docking station (probably prime-
select using 'ondemand'). This is GPU driver related.
** This
Public bug reported:
Ubuntu Release: Ubuntu 20.04.3 LTS
Installation Style: Minimal (selected during GUI install) (Untested against
full installation style)
Patient System Hardware Information: Lenovo ThinkPad P50 (Xenon) - Intel HD
Graphics + NVIDIA Quadro M2000M (NVIDIA Prime enabled
*** This bug is a duplicate of bug 1532508 ***
https://bugs.launchpad.net/bugs/1532508
I am also experiencing this on a Lenovo P50, with Unity 7.5.0 and
lightdm 1.26.0 running on Ubuntu 18.04 LTS
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