I'm attaching the requested logs.
Near the end of this file you'll see the last action I performed, which
was the CTRL+ALT+PRINT+REISUB combination to reboot. You'll also see
that there is a long crash log related to AMDGPU.
Oh, and this time when it crashed I attempted to switch TTY, and then
OK then. Next time the freeze happens please:
1. Wait 10 seconds.
2. Reboot.
3. Open a Terminal and run:
journalctl -b-1 > prevboot.txt
4. Attach the resulting text file here.
5. Follow all the steps in comment #2 again.
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I can't see any files in /var/crash/, even after applying the workaround
and reproducing the freeze again.
This time the freeze was more severe. There was no response from the
keyboard and a hard reset was the only way to recover.
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Thank you for taking the time to report this bug and helping to make
Ubuntu better. It sounds like some part of the system has crashed. To
help us find the cause of the crash please follow these steps:
1. Look in /var/crash for crash files and if found run:
ubuntu-bug YOURFILE.crash
Then tell
