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Message-ID: <9f8bab1d-5f60-c962-3789-1b5ed8767076@bell.net> Date: Thu, 5 Jan 2023 14:51:06 -0500 From: Matt Fagnani <matt.fagnani@...l.net> To: Vasant Hegde <vasant.hegde@....com>, Baolu Lu <baolu.lu@...ux.intel.com>, Thorsten Leemhuis <regressions@...mhuis.info> Cc: Joerg Roedel <jroedel@...e.de>, "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>, LKML <linux-kernel@...r.kernel.org>, "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>, Linux PCI <linux-pci@...r.kernel.org>, Bjorn Helgaas <bhelgaas@...gle.com> Subject: Re: [regression, bisected, pci/iommu] BugĀ 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled I booted 6.2-rc2 + the patch four times with early kdump enabled and panicked the kernel. There weren't any kdump or dmesg files saved to /var/crash though. Nothing showed up in the journal from boots where the problem happened. The amdgpu crash happened before systemd-journald started from what I could tell. I tried to rebuild /boot/initramfs-6.2.0-rc2+kdump.img with amd_iommu=off added to the kernel command line with dracut, but an error that the kdumpbase module couldn't be found was shown. I read that a different dump capture kernel could be used with kdump, but I haven't figured out how to use that with early kdump yet. If anyone has ideas how to get the kdump and dmesg log, let me know. Thanks.
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