https://bugzilla.kernel.org/show_bug.cgi?id=208569
Bug ID: 208569
Summary: Problems with Cool'n'Quiet on Ryzen CPUs
Product: ACPI
Version: 2.5
Kernel Version: 5.4.0-40-generic
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Processor
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Hi everyone,
I am wondering if anybody else is experiencing some random reboots of computers
with Ryzen processors. Specially when in idle (with no processor demand). This
reboots are either followed by an MCE hardware error in the log files or no
message is displayed. Both situations alternate.
I found a thread here relating this with some power management issue with
amdgpu module driver. But I can confirm that the issue still persists with
nvidia module drivers. Tested by me with RX550 and GTX1030.
The issue stops if the Cool'n'Quiet feature is turned off in the BIOS. In a
search, the powernow-k8 does not support Ryzen processors and are not loaded in
my system.
This solution is bad since the processor works at the maximum frequency all the
time. In my case, for example, a Ryzen 7 2700 runs at 3200 MHz all the time.
With Cool'n'Quiet it should run at 1500 MHz and rump up only on demand.
Please, if some additional information is necessary, give me instructions on
how obtain it.
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