There are similar reports from other users as well, like https://askubuntu.com/questions/1239073/ubuntu-20-04-lts-screen-freezes-after-login-when-waking-laptop-up-from-suspend/1423381#1423381 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1785964
I'd dig into that but do not know how to investigate it.
There are similar reports from other users as well, like /askubuntu. com/questions/ 1239073/ ubuntu- 20-04-lts- screen- freezes- after-login- when-waking- laptop- up-from- suspend/ 1423381# 1423381 /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1785964
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I'd dig into that but do not know how to investigate it.