I think this problem has been verified because it affects many people. [SUMMARY] Kernels (even the newest) can't load on same Acer and Lenovo notebook types because of this error and freezing: https://bugzilla.kernel.org/attachment.cgi?id=276591 Tsc clocksource calibration then soft lockup
There are several workaround for this which can help to identify this. 1. noapic kernel parameter 2. ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 (these are maybe the smbus and iommu controllers ) 3. acpi_osi=! acpi_osi=\"Windows 2009\" (no automatic stanby mode with this) I can attach more recent dmesg logs and even SSDT DSDT tables if that is needed. I think all necessary information are available to fix this problem, so !!!PLEASE DON'T SPAM!!! this thread from now on. It won't help. -- 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
