Date: Thu, 02 Mar 2023 00:55:14 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268393 --- Comment #10 from Jonathan Vasquez <email@example.com> --- Hey John, Thanks for that. I got some interesting results! It's been a few months since my last post and since then I've reinstalled FreeBSD, it's currently on 13.2-STABLE (stable/13-n254729-3912f99ecae6/GENERIC). There is nothing in /etc/sysctl.conf at the moment. So let's begin from what perspective. I first compiled the /usr/src/sys/amd64/conf/MINIMAL kernel and rebooted. The first time I did this the system locked up since it couldn't find my root filesystem, which is on ZFS on an NVMe drive. After some digging, I added a few options (not the minimum options needed but I casted a wide enough net within reason to allow the system to boot). After I got it booting successfully, I wasn't able to type anything. Makes sense.. MINIMAL has no USB support lol. I added those in as well, so I ended up with a MINIMAL config with the following extra info: device crypto device acpi device nvme device nvd options ZSTDIO device uhci device ohci device ehci device xhci device usb device hid --------- Now that I was in the system successfully, we can notice that the system didn't crash. I did a 'poweroff' as well to get the system back to the cold state which causes it to crash on boot (first time, once it's hot it won't crash). I did the 'kldload snd_hda' and the system immediately crashed, and I noticed that I saw some messages regarding 'drm-510-kmod'. I thought, ah! yea I forgot I needed to uncomment the kld_list in my /etc/rc.conf since I have 'amdgpu vboxdrv' in there. So I was thinking, the AMD Radeon XT 6900 (sienna_cichlid) and the snd_hda may be having a conflict. I commented out the kld_list line and did a 'poweroff' again. I turned the machine back on immediately and booted up. I did another 'kldload snd_hda' and the system didn't crash! I was like yea .. maybe there is a conflict between those two drivers. But I was skeptical. I decided to do another 'poweroff' and wait 5 seconds before I continue, to give any internal system components time to properly reset themselves, just in case. After the 5 seconds, I turned it back on and booted. I did another 'kldload snd_hda', and the system crashed again! This time with no 'drm-510-kmod' messages, just a clean dump. So that makes me think that there potentially could be two issues here, or it could just be one underlying issue (the page fault) that's causing it to appear in two places. I also did a final test with loading the 'vboxdrv' and re-testing, that driver didn't conflict, I just crashed with the same scenario as just mentioned (without amdgpu loaded.. our clean dump). I've attached the following crash dumps for inspection: - 1_with_amdgpu_core.txt - 2_clean_core.txt - 3_clean_core.txt (this is the third run that has vboxdrv loaded but same info as without vboxdrv.. so vboxdrv doesnt seem to cause an issue). Thank you! -- You are receiving this mail because: You are the assignee for the bug.