Hi, linux newbie and relatively fresh install of fedora 33. What should be my first trouble shooting steps? Laptop is a Lemur Pro from system76.

Otherwise, Fedora is working ok although not so sure about Kwin...may end up with Sway.

Thanks

Do you mean shutdown or freeze?

Phantom Shutdowns can come from the processor getting too hot, bad power supply, bad RAM, something running systemctl poweroff

Freezes can be graphic module, kernel bug,...etc.

Is Fedora using systemd? If so does the journal give you any answers?

Thanks, appears to be a complete shut down rather than freeze as the screen is black.

Yes, using systemd. I know I can use journalctl --since "2020-01-24 12:30:00" --until "2020-01-24 14:30:00" to restrict the output size. How do I redirect this to a file though so I can post a section of it on here?

Cheers

Example:

Thanks for your patience. I tried the following and was left with an empty text file. What did I do wrong? The journal is from empty.

systemctl --lines="all" --since "2020-01-24 12:30:00" --until "2020-01-24 14:30:00" > log_systemd.txt

The output is:-

"-- Logs begin at Fri 2021-01-15 10:26:34 GMT, end at Sun 2021-01-24 16:53:41 GMT. --
-- No entries --"

Can anyone help?

See if you can monitor cpu temps actively.
Run command line top and see if some process goes wild. Look for zombies.
Monitor power/battery issues. Use either battery or ac.

Do a complete install again after you run memtest for a few days.

Can try different distro. Double check md5/shal downloads.

If a system has a chance it might report to some file. /var is a typical location for that information. There is a way to make that more verbose but I forget how.

The problem has resolved so I suspect it was a fedora kernal issue.

^ Good. Please mark your thread SOLVED now (see my signature). Others will benefit.
For future reference:
Are you sure you formatted the date correctly? Does a simple "journalctl -b -1" give anything? Or just "journalctl"?
It is possible that persistent journaling isn't switched on.
Please show us

1 members found this post helpful.

I get output from both journalctl -b -1 & journalctl.

cat /etc/systemd/journald.conf : -

[Journal]
#Storage=auto
#Compress=yes
#Seal=yes
#SplitMode=uid
#SyncIntervalSec=5m
#RateLimitIntervalSec=30s
#RateLimitBurst=10000
#SystemMaxUse=
#SystemKeepFree=
#SystemMaxFileSize=
#SystemMaxFiles=100
#RuntimeMaxUse=
#RuntimeKeepFree=
#RuntimeMaxFileSize=
#RuntimeMaxFiles=100
#MaxRetentionSec=
#MaxFileSec=1month
#ForwardToSyslog=no
#ForwardToKMsg=no
#ForwardToConsole=no
#ForwardToWall=yes
#TTYPath=/dev/console
#MaxLevelStore=debug
#MaxLevelSyslog=debug
#MaxLevelKMsg=notice
#MaxLevelConsole=info
#MaxLevelWall=emerg
#LineMax=48K
#ReadKMsg=yes
#Audit=yes

Please use CODE tags instead of Quote tags (see my signature).
Everything in this file is commented out.
What's the default for "Storage" on your system? Maybe "man journald.conf" has answers, or the Fedora wiki.