well, if you plug in a usb device and that happens that indicates the
hardware completely reset.

If it was just a kernel crash then the machine would have stayed hung
until you reset/power cycled it.

It would have to be it crashed because of the usb device being plugged
in, and it would have to be a hw issue since it immediately rebooted.

So something about either the device you plugged in or the usb bus you
connected to.   If this was an add-in card make sure its extra power
connection is plugged in.

I do have a couple of pci-e usb cards that do not work right on a
really old motherboard I have and will (if used with say a usb camera)
immediately reset the machine the instant a program opens the camera.

On Thu, Jan 6, 2022 at 5:10 PM Michael Hennebry
<henne...@web.cs.ndsu.nodak.edu> wrote:
>
> On Thu, 6 Jan 2022, stan via users wrote:
>
> > On Thu, 6 Jan 2022 16:17:07 -0600 (CST)
> > Michael Hennebry <henne...@web.cs.ndsu.nodak.edu> wrote:
> >
> >> Where does F33 keep the messages from the last system crash?
> >>
> > If they were captured, I think one of the places they would be is the
> > journal.
> > journalctl -r
> > will read the journal from the end towards the beginning.  You will
> > have to bypass the session that is the reboot you are reading from.
>
> Thanks.
> This is what I got:
> Jan 06 15:32:47 localhost.localdomain kernel: SELinux:  Permission watch in 
> class filesystem not defined in policy.
> -- Reboot --
> Jan 06 15:10:29 fedora firefox.desktop[611691]: ###!!! 
> [Parent][DispatchAsyncMessage] Error: PMessagePort::Msg_PostMessages 
> Processing error: message was>
> Jan 06 15:10:29 fedora firefox.desktop[611691]: IPDL protocol error: Handler 
> returned error code!
> -- Reboot --
> Jan 06 09:32:37 localhost.localdomain systemd-journald[176]: Journal stopped
>
> As far as I could tell,
> the system was running fine at 15:37 and for a bit after that.
> It had been running since yesterday and my firefox windows were up.
> Shortly after 15:37, I plugged in a USB cable with no device attached.
> I heard what I took to be the fan being real busy and unplugged the cable.
> I then tried to move the mouse so that I could close firefox.
> Could not even see the mouse.
> Shortly thereafter, "no signal" on the monitor and rebooting started.
>
> So far as I know, nothing interesting happened at 9:32:37 today.
> The available evidence, my firefox windows,
> suggest that there was no reboot at that time.
>
> What happened?
> In the alternative, how do I find out what happened?
>
> I've had almost the same thing happen before.
> I'd plug in a USB cable, possibly with a cell phone attached,
> though not this time,
> the fan would speed up and the mouse would freeze.
> Complete lock up.  Could not even switch virtual windows.
>
> Any ideas?
>
> --
> Michael   henne...@web.cs.ndsu.nodak.edu
> "Sorry but your password must contain an uppercase letter, a number,
> a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
>                                                               --  someeecards
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