(In reply to Philip Rosvall from comment #522) > I have only used the workaround since kernel 4.20.4, so I just booted the > kernel now without and with the parameter. As can be seen in line 704 in the > log without "idle=halt", we see the error "[Firmware Bug]: ACPI MWAIT > C-state 0x0 not supported by HW (0x0)". This error does not occur when > "idle=halt" is set.
Yeah, this is starting to look more and more like a BIOS issue on certain mobos. Since your machine is issuing that ACPI MWAIT error, can you apply the debugging patch from comment #512, build a kernel, boot into it without "idle=halt" and upload dmesg again? Thx. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1690085 Title: Ryzen 1800X freeze - rcu_sched detected stalls on CPUs/tasks To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1690085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
