Created attachment 280669 dmesg of freeze with 4.20.3 kernel and nomwait, rcu_nocbs, max_cstate applied
some older info here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690085/comments/566 I have three machines with new 2700x CPUs, and all three of them experience freezes in xubuntu 18.04 after some time of work. I use compiling QEMU with make -j16 in a loop to test for stability. I'm not sure it is the same bug, because I observe different behaviour: one machine, that was compiling QEMU, froze during the night, and the one left idle worked for 1 day. Another thing that SEEM to help is disabling SMT: machine with disabled SMT is currently at 7 hours of uptime, which is much more, than usual 1-3 hours before freeze. Windows 10 seem to work fine: I used WSL with ubuntu 18.04 for the same test compilations for 3 days, and no freezes with the same bios settings. Things I've tried that didn't help: idle=nomwait rcu_nocbs=0-15 with new kernel (4.20.3) disabled cool n quiet and c6 states Typical Current Idle in uefi Set SoC voltage to 1.1v Set DRAM voltage to 1.3v Update to latest BIOS High-end PSU -- 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
