Ubuntu
linux package

  1. Bug #1690085
  2. Comment #684

Comment 684 for bug 1690085

Revision history for this message
In , i (i-linux-kernel-bugs) wrote :

(In reply to Liu Liu from comment #585)
> Created attachment 282319 [details]
> Threadripper 2920x soft lockup
>
> I've went through this thread, and tried to disable c6 state, add idle=halt
> with no effect. Followed this excellent reprod steps in
> https://www.reddit.com/r/Amd/comments/apw8im/
> ryzen_freezes_in_linux_even_if_linux_is_in_vm/ It is pretty consistent.
> However, switching to gcc-8 seems resolved this for this particular reprod
> steps. With dmesg -w, I was able to capture and verify this is indeed a soft
> lockup. Attached the dmesg output.
>
> It is a Threadripper 2920x with MSI x399 Gaming Pro Carbon AC with latest
> BIOS on Ubuntu 18.04.2 LTS.
>
> Linux sz77 4.15.0-47-generic #50-Ubuntu SMP Wed Mar 13 10:44:52 UTC 2019
> x86_64 x86_64 x86_64 GNU/Linux

Some updates since I last posted. I've updated to gcc-8 and enabled idle=halt. Even though idle=halt + gcc-7 with the original reprod steps can still cause a lockup. By defaulting to gcc-8 and idle=halt, in day-to-day uses, I haven't encountered any system lockup in the past 2 months. I concluded that idle=halt should mitigate this problem for normal uses.