https://bugzilla.kernel.org/show_bug.cgi?id=76321
Bug ID: 76321 Summary: Incorrect hwmon temperature when radeon card is turned off Product: Drivers Version: 2.5 Kernel Version: 3.15-rc3 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: pali.rohar@gmail.com Regression: No
When radeon card is turned off (automatically via runpm) sensors program show totally incorrect temperature:
radeon-pci-0100 Adapter: PCI adapter temp1: +511.0°C (crit = +120.0°C, hyst = +90.0°C)
When some opengl program is running with DRI_PRIME=1 then sensors reports:
radeon-pci-0100 Adapter: PCI adapter temp1: +46.0°C (crit = +120.0°C, hyst = +90.0°C)
So kernel radeon driver should not report temperature (e.g. returns -EINVAL in hwmon) when radeon card is turned off (via vgaswitcheroo or runpm).