https://bugs.freedesktop.org/show_bug.cgi?id=105188

Bug ID: 105188 Summary: Monitors don't always wake up after sleep 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: mbartoszkiewicz@gmail.com

Created attachment 137497 --> https://bugs.freedesktop.org/attachment.cgi?id=137497&action=edit Kernel log

Hardware: GPU: Gigabyte Radeon RX 480 G1 Gaming 8GB Monitors: 3× Eizo FlexScan S2243W, connected using DP Software: Distribution: Gentoo Kernel: 4.15.4 x11-drivers/xf86-video-amdgpu-1.4.0 x11-base/xorg-server-1.19.6 media-libs/mesa-18.0.0_rc4 x11-libs/libdrm-2.4.89

The monitors do not always correctly wake up from sleep. E.g. after locking the session, the monitors go to sleep. After pressing a key, only some wake up – the rest are still sleeping. It does not seem to be deterministic – sometimes a monitor will wake up correctly, sometimes not.

The kernel log attached is after running the following script: for i in {1..5}; do echo "XXX before suspend $i" | sudo tee /dev/kmsg; xset dpms force suspend; sleep 10; echo "XXX before on $i" | sudo tee /dev/kmsg; xset dpms force on; sleep 10; echo "XXX status $i:" $(cat /sys/devices/pci0000:00/0000:00:03.0/0000:03:00.0/drm/card0/card0-DP-*/status) | sudo tee /dev/kmsg; done

I am not sure if it is directly related to this issue, but the kernel log contains two refcount_t warnings in amdgpu code.