https://bugzilla.kernel.org/show_bug.cgi?id=201539
Bug ID: 201539 Summary: AMDGPU R9 390 automatic fan speed control in Linux 4.19 Product: Drivers Version: 2.5 Kernel Version: 4.19 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: 0xe2.0x9a.0x9b@gmail.com Regression: No
GPU: R9 390 Kernel module: amdgpu Application (example): Rise of the Tomb Raider benchmark
In Linux 4.18 the fan speed of the GPU gradually adapts to GPU load. Maximum pwm is 155 during the benchmark.
In Linux 4.19 the overall fan speed is lower (which is more silent than 4.18, with maximum at 112) but the fan spikes to full speed (pwm=255) for 1-2 seconds which is extremely loud.
The 4.18 and 4.19 kernels are using the same firmware.