On 2020-05-17 19:36, Jarrah wrote: > Good Morning, > > About a month ago, kernel-latest 5.6.4 was released which resolved the > issues booting Qubes on the RX 5700 XT. This has been working and stable > since this time. > > Yesterday I installed a number of updates (including Xen and > kernel-latest) and (after the updates had completed) had an issue which > reset my bios. Since then, I have been unable to boot Qubes using the > 5700 XT. System works fine in another OS. > > > The only error output I have seen is as follows (observed on different > boots): > > "[Firmware Bug]: cpu 2, try to use APIC520 (LVT offset 2) for vector > 0xF4, but the register is already in use for vector 0x0 on this cpu." > > A failure to start IOMMUv2 (does not occur with the other graphics card) > > > After fixing the bios settings, my next thought was to roll back the Xen > and kernel update. However, this did not solve the issue. > > Other attempts: > > * Boot the system with another GPU: Works fine > > * Boot the system without Xen (just the dom0 kernel): works fine. > > * Boot the system outputing to the hypervisor console: system boots to > login screen. All autostarted VMs boot. Keyboard entry does not get sent > to dom0, but ctl-alt-del reboots the system and outputs to screen. > > * Boot the system and let it sit after the screen locks up: All > autostarted VMs boot but I cannot interact with the system. I can tell > by the hvc above and the fact that my mouse turns on. > > * The error above has been connected to an ACPI issue. Adding the > "acpi=off" boot parameter resulted in a kernel panic probably unrelated > to the GPU issue. > > * Tested the just-released 5.6.13 kernel: Same issue now found on 5.6.4 > (previously good) through 5.6.13. > > * Set every IOMMU/ACS/SVM setting I can find in my bios. > > > I'm stuck for ideas at this point. Has anyone experienced something similar?
At this point, I would rather suggest you to check in changelog of kernel if there would be related commits but still, post a BZ issue on kernel. > Thanks. > Frédéric -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/d279318d-74ba-b83f-c78c-f1f99450195a%40qubes-os.org.
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