This bug bugs me so much, that I registered to kernel bugzilla. I tried many workarounds, nothing solved it.
Machine: ThinkPad A485 with AMD 2500U. System: Distributor ID: Ubuntu Description: Ubuntu 19.04 Release: 19.04 Codename: disco Kernel: Linux kni 5.0.0-13-generic #14-Ubuntu SMP Mon Apr 15 14:59:14 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux And the problem is still there. Have idle=nomwait kernel parameter set, but tried many others. Disabling C6 states, everything. I can reproduce this with 100% success by running my accounting software Flexibee (https://www.flexibee.eu/podpora/stazeni-flexibee/) which has a PostgreSQL backend. When it stars PostgreSQL, soft lockups start to appear, it gives me freezes and finally the system completely freezes after a 30 or so seconds. I can even reproduce it in VirtualBox, when starting the software in VirtualBox, it crashes the whole system (the host system!). I can offer help with debugging this problem. This problem needs to go away. It is not present on Windows as far as I know. -- 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
