[Bug 263632] framework laptop crashes a few seconds after resuming from sleep

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263632

--- Comment #7 from Jonathan Vasquez <jon@xyinn.org> ---
Some minor updates. I originally said that I have dumps disabled since this
system is running ZFS (and I remember there was an issue with ZFS + crash
dumps). Checking my servers config, I noticed I had written a comment about
this, which was that I disabled crash dumps because it caused issues when using
a mirrored swap configuration on ZFS. Since my laptop isn't using mirrored
swap, I re-enabled it (dumpdev="YES" (rather than "AUTO" or "NO)). The first
few tries I tried to put the computer to sleep and then wake it, the computer
didn't actually crash. I then switched dumpdev back to NO and the computer
crashed within seconds. Switching it back to YES started crashing again so
unfortunately that didn't lead to anything. However, I then tried to leave
dumpdev enabled and attempted to try and get some crash dumps from the sleep
wake. Since I originally installed FreeBSD with only 16 gb of physical swap
space, and this machine had 32 gb, I received messages regarding their is no
suitable dump device and that the save core is not run. To mitigate this, I
tried to just create a 64 GB swap file but that didn't work either.
Furthermore, trying to do a 'dumpon /dev/md0' yielded the following:

root@leslie:~ # dumpon -l
/dev/null
root@leslie:~ # dumpon /dev/md0
dumpon: ioctl(DIOCSKERNELDUMP): Operation not supported

I suppose this is related to swapfiles not being supported for crash dumps?

https://forums.freebsd.org/threads/how-to-enable-crash-dumps.84340/#post-559174

SirDice also mentioned that swap files probably can't be used for this. Since
it was pretty time consuming to get my system up to this point, I don't want to
do the work to reinstall the entire system just to realign the physical swap..
eventually I'll need to do it if I want to properly test out FreeBSD's
hibernate support however.

To finish off, the few times that I did wake up the system and it didn't
immediately crash, I did notice the following lines in dmesg, maybe this helps
in some way:

drmn0: GPU HANG: ecode 12:1:85dffffb, in MainThread [100939]
drmn0: Resetting rcs0 for stopped heartbeat on rcs0

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