https://bugs.freedesktop.org/show_bug.cgi?id=101528
Bug ID: 101528 Summary: RX460 Memory clock stays high until card is "used" Product: DRI Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: sverd.johnsen@googlemail.com
linux 4.11.4
I use the IGPU on SKL and a RX460 as a dedicated card. In XOrg i turned autobindgpu, autoaddgpu off and singlecard on. with fb fbcon=map kernel parameter i map the linux ttys to different cards. the way i switch to the AMD card is to vt switch and then change the input on my monitor. this works fine and lets me login via agetty and launch a new xserver. One thing i noticed is that until i actually do that the memory clock of the card stays high (17xx mhz?) which makes it 5-8°C hotter and probably uses more power than it needs.