(In reply to Michael from comment #423) > So, I'm running Ubuntu 18.04 stock kernel with > - Typical Current Idle > - disabling global c-states > - idle=nomwait kernel parameter > > and have no freezes for 8 Days now - new record. So it looks like I can > confirm what Nelson Castillo mentioned in comment #419 > > This seems ok now. Now I need to verify if all changes are needed or if only > one or two are necessary. > > Will come back with an update when I have the results. > > Michael
Hi! First, I've changed my mainboard (see below). AGESA-wise this was a downgrade from 1.0.0.4 to 1.0.0.2. This does change the chipset from B450 to X470. Second, I did enable the global c-states in UEFI and am still running without freezes for over 14 days now. I consider that long enough to call it stable. That means only the following changes are needed: - typical current idle UEFI setting - the idle=nomwait kernel parameter For reference: Asrock X470 Master SLI with BIOS 1.10 2700x no overclocking, but ram on XMP profile. # ./zenstates.py -l P0 - Enabled - FID = 94 - DID = 8 - VID = 36 - Ratio = 37.00 - vCore = 1.21250 P1 - Enabled - FID = 80 - DID = 8 - VID = 59 - Ratio = 32.00 - vCore = 0.99375 P2 - Enabled - FID = 84 - DID = C - VID = 76 - Ratio = 22.00 - vCore = 0.81250 P3 - Disabled P4 - Disabled P5 - Disabled P6 - Disabled P7 - Disabled C6 State - Package - Disabled C6 State - Core - Enabled I'll stop playing with parameters since I think I reached the best I can. I'll only update if something changes like freezes keep returning etc. Regards, Michael -- 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
