(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. -- 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
