It appears the problem is most likely this:
[ 989.990] (WW) modeset(0): flip queue failed: Device or resource busy
[ 989.990] (WW) modeset(0): Page flip failed: Device or resource busy
[ 989.990] (EE) modeset(0): present flip failed
[ 990.106] (WW) modeset(0): flip queue failed: Device or resource busy
[ 990.106] (WW) modeset(0): Page flip failed: Device or resource busy
[ 990.106] (EE) modeset(0): present flip failed
[ 990.122] (WW) modeset(0): flip queue failed: Device or resource busy
[ 990.122] (WW) modeset(0): Page flip failed: Device or resource busy
[ 990.122] (EE) modeset(0): present flip failed
[ 990.147] (WW) modeset(0): flip queue failed: Device or resource busy
[ 990.147] (WW) modeset(0): Page flip failed: Device or resource busy
where the Xorg 'modeset' driver is trying to talk to the kernel
'nouveau' driver.
** Package changed: nvidia-graphics-drivers-390 (Ubuntu) => xorg-server
(Ubuntu)
** Changed in: xorg-server (Ubuntu)
Status: Fix Released => New
** Summary changed:
- General Performance Is "slow" including stuttering when dragging windows
around etc (nvidia-390 is installed but modesetting in use)
+ [nouveau] General Performance Is "slow" including stuttering when dragging
windows around etc
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https://bugs.launchpad.net/bugs/1809423
Title:
[nouveau] General Performance Is "slow" including stuttering when
dragging windows around etc
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