(In reply to Klaus Mueller from comment #427) > (In reply to JerryD from comment #426) > > I am on Ryzen 2500U Laptop, HP. I am using kernel 4.18.9-200.fc28.x86_64. > > > > The zenstates.py script fails when I try to disable C6. Oh well. > > Did you load msr kernel module before (modprobe msr)? > > Do you have the possibility to slightly overclock? Isn't there a Bios switch > like "Typical Current Idle"? Is there a possibility to switch of C-states > completely in the Bios (just for testing to be sure your hangs are the same > reason as here)?
As follows: [root@amdr jerry]# modprobe msr [root@amdr jerry]# ./bin/zenstates.py --list P0 - Enabled - FID = 64 - DID = A - VID = 35 - Ratio = 20.00 - vCore = 1.21875 P1 - Enabled - FID = 66 - DID = C - VID = 60 - Ratio = 17.00 - vCore = 0.95000 P2 - Enabled - FID = 60 - DID = C - VID = 66 - Ratio = 16.00 - vCore = 0.91250 P3 - Disabled P4 - Disabled P5 - Disabled P6 - Disabled P7 - Disabled C6 State - Package - Enabled C6 State - Core - Enabled [root@amdr jerry]# ./bin/zenstates.py --c6-disable Traceback (most recent call last): File "./bin/zenstates.py", line 112, in <module> writemsr(0xC0010292, readmsr(0xC0010292) & ~(1 << 32)) File "./bin/zenstates.py", line 23, in writemsr raise OSError("msr module not loaded (run modprobe msr)") OSError: msr module not loaded (run modprobe msr) As you can see msr is loaded and listing the states works fine but the disable option fails. The bios on this laptop has no power related options that I can see. -- 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