The only crash-like problem I can see in those logs is:
simple-framebuffer simple-framebuffer.0: drm_WARN_ON(map->is_iomem)
which seems to be non-fatal for the Xorg process that triggered it. The
cause of that issue is also bug 2060268, but that too is not a crash. So
please follow these steps:
1. Look in /var/crash for crash files and if found run:
ubuntu-bug YOURFILE.crash
Then tell us the ID of the newly-created bug.
2. If step 1 failed then look at https://errors.ubuntu.com/user/ID where
ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine.
Do you find any links to recent problems on that page? If so then please
send the links to us.
Please take care to avoid attaching .crash files to bugs as we are
unable to process them as file attachments. It would also be a security
risk for yourself.
** Package changed: gdm3 (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2064037
Title:
GDM session crashes after returning from a screen-off.
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