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? Thanks. -- 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/35b974a3-13f1-cabf-9731-5e9aa1fcbed2%40undef.tools.
