suddenly (HDMI) dispaly power standby.
debian buster (armbian + linux 5.3-rc8) with latest mesa installed (https://github.com/zhangn1985/lima_gpu_drv). Xserver version 1.20, not git master.
Xserver configure follow: https://gitlab.freedesktop.org/lima/web
after boot to desktop, display will go to standby mode after about 1-2mins, regardless user action. replug HDMI cable, it will back to normal.
this issue will happen only once for each boot. this issue will not happen when use fbdev.