I had "ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2" on 18.04.03LTS with BIOS v1.13 on A315-41-R909 Just flashed v1.15 and now it boots ok without any extra parameters I share some info from /var/kernel.log
It is better to keep "ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2" for better performance (see below related Firmware Bug lines)? If someone needs some more logs in order to improve the solution, just ask Thanks in advance In boot without extra parameters, and: -New lines with "Firmware Bug" Aug 16 17:13:20 enrique-Aspire-A315-41 kernel: [ 0.123596] AMD-Vi: [Firmware Bug]: : IOAPIC[4] not in IVRS table Aug 16 17:13:20 enrique-Aspire-A315-41 kernel: [ 0.123598] AMD-Vi: [Firmware Bug]: : IOAPIC[5] not in IVRS table Aug 16 17:13:20 enrique-Aspire-A315-41 kernel: [ 0.123599] AMD-Vi: [Firmware Bug]: : No southbridge IOAPIC found -This line with "Firmware Bug" does not disappear, but it seems not critical (it was booting before and it boots now) Aug 16 17:13:20 enrique-Aspire-A315-41 kernel: [ 0.179342] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored -New line appears (it wasn't before) which shows something new about iommu Aug 16 17:13:20 enrique-Aspire-A315-41 kernel: [ 1.314978] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1776563 Title: Acer Aspire A315 IOAPIC failure on Ubuntu 18.04, kernel hangs, can't load, kernel freeze (AMD Ryzen 5/Radeon/Raven) / AMDGPU Hybrid crash To manage notifications about this bug go to: https://bugs.launchpad.net/amd/+bug/1776563/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
