I’m using the latest version of `nvidia-driver` from ports (440.31). Is that 
considered a DRM driver?

> On Nov 5, 2019, at 1:22 PM, Mark Johnston <[email protected]> wrote:
> 
> On Tue, Nov 05, 2019 at 12:44:06PM -0500, Brennan Vincent wrote:
>> (Note: I have also posted this to the forums, but upon reading the forum 
>> guidelines more carefully I realized the mailing list is probably a better 
>> venue. So if you are also a forum reader, I apologize for the extra churn.)
>> 
>> Hello, I am running 13-CURRENT (compiled recently from source using default 
>> build settings) and recently I have been kernel panics every so often. They 
>> can happen at any time but seem to be more likely when the system is running 
>> a graphical environment and is at high load (e.g., during `make -j64 
>> buildworld`).
>> 
>> I have configured my system to collect core dumps: my swap partition is 50 
>> GB (large enough to contain any conceivable minidump), `dumpon` reports that 
>> it is indeed configured as a dump partition, and I have 
>> `savecore_enable="YES"` in /etc/rc.conf. I also have the sysctl 
>> `debug.debugger_on_panic` set to 0, which seems to be necessary for core 
>> dumps to happen (instead of breaking into the debugger on panic). Before, 
>> when that sysctl was set to 1, my graphical environment would hand; now it 
>> reboots. The changing behavior depending on the value of 
>> `debug.debugger_on_panic` is what makes me think this really is a kernel 
>> panic, as opposed to some other possible issue that could cause a crash.
>> 
>> The weird thing is that when I manually cause a panic via `sudo sysctl 
>> debug.kdb.panic=1` , my system reboots as expected, and a core dump **does** 
>> get generated and saved in /var/crash! So it's only the mysterious random 
>> crashes that aren't causing core dumps.
>> 
>> Can anyone help me figure out why core dumps are not getting generated, and 
>> how I can possibly debug what is going on?
> 
> Are you using one of the DRM graphics drivers?  I've found that setting
> dev.drm.skip_ddb="1" in loader.conf is sometimes necessary.
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