Created attachment 1827270 [details]
dmesg for a boot when freeze happened

1. Please describe the problem:
I've recently experienced a few instances of system freezes on Fedora 35.
- no response from keyboard/mouse
- unable to ssh in from another machine
- nothing in logs at all

All I can do is hold down the power button to get the system to power off and then restart.

I enabled crash dumps as per this wiki page, but there's no crash info either after a freeze
https://fedoraproject.org/wiki/How_to_use_kdump_to_debug_kernel_crashes

2. What is the Version-Release number of the kernel:
kernel-5.14.7-300.fc35.x86_64

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

Yes, it appeared to work fine with 5.14.6. I've gone back to using that version for the time being, and have not had any freezes (yet).


4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:
Unfortunately not. I'm still doing the usual things I do when I use my system, so if I do see another freeze, I will try to see what application I was on etc.

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:

I've not tested this out yet. I'll do it after work today and report back.

6. Are you running any modules that not shipped with directly Fedora's kernel?:

Not that I'm aware of. (No Nvidia etc. here)

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

Attached.