[Bug 212107] New: Temperature increase by 15°C on radeon gpu

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=212107

            Bug ID: 212107
           Summary: Temperature increase by 15°C on radeon gpu
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.11
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: martin.tk at gmx.com
        Regression: No

Created attachment 295701
  --> https://bugzilla.kernel.org/attachment.cgi?id=295701&action=edit
dmesg.log

Since upgrading my kernel from 5.10.16 to 5.11.3 I noticed an increase in
temperature on my AMD gpu (Radeon RX550). I later tried both 5.10.20 and 5.11.4
and I can notice the increase in temperature only on 5.11 kernel.

In addition to the temperature I noticed that the fan on gpu would spin up to
max rpm for a second or two right after waking up the PC from sleep. I've never
noticed such behaviour before.

I can't see any errors in the logs and the system seems to be running normal.
No crashes nor degraded performance either.

I check temperature using sensors utility. For 5.11.4 it shows the following:

1st run:

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:      962.00 mV 
fan1:         963 RPM  (min =    0 RPM, max = 3500 RPM)
edge:         +54.0°C  (crit = +97.0°C, hyst = -273.1°C)
power1:        9.13 W  (cap =  36.00 W)


2nd run few minutes later:

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:      825.00 mV 
fan1:         978 RPM  (min =    0 RPM, max = 3500 RPM)
edge:         +47.0°C  (crit = +97.0°C, hyst = -273.1°C)
power1:        7.19 W  (cap =  36.00 W)


5.11.3:
amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:      962.00 mV 
fan1:         991 RPM  (min =    0 RPM, max = 3500 RPM)
edge:         +57.0°C  (crit = +97.0°C, hyst = -273.1°C)
power1:        9.08 W  (cap =  36.00 W)


these two are on 5.10.16:

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:      787.00 mV 
fan1:         976 RPM  (min =    0 RPM, max = 3500 RPM)
edge:         +39.0°C  (crit = +97.0°C, hyst = -273.1°C)
power1:        6.11 W  (cap =  36.00 W)

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:      962.00 mV 
fan1:         976 RPM  (min =    0 RPM, max = 3500 RPM)
edge:         +40.0°C  (crit = +97.0°C, hyst = -273.1°C)
power1:        8.26 W  (cap =  36.00 W)



I'm attaching parts of dmesg log I thought relevant.

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