Ubuntu 20.04 + 980TI + Drv 450/460 = black screen

Hello,
since 450/460 driver on Ubuntu 20.04, as soon as the computer goes to sleep, impossible to wake it up, the screen remains black screen …
no problem with the 440, except that it is no longer available …

my configuration:
AMD Ryzen 2600x
Asrock B450 Gaming-ITX/AC
GSkill 32gb ddr4
Ubuntu 20.04 French version, 64 bits, w. latest update
gygabyte gtx 980ti g1 gaming
acer cb342ck (dvi connection)
thanks

Please run nvidia-bug-report.sh as root and attach the resulting nvidia-bug-report.log.gz file to your post.

nvidia-bug-report.log.gz (410.4 KB)