Bug#1000681: linux-image-5.15.0-1-amd64: 5.15 upgrade causes all apps to flicker

[Stefan Fritsch]

There is discussion and a fix for this issue at

https://lists.freedesktop.org/archives/nouveau/2021-December/039597.html
https://lists.freedesktop.org/archives/nouveau/2021-December/039609.html