AMD Navi10 GPU randomly blanks display connected through HDMI

Submitted by Timur Kristóf

Assigned to Default DRI bug account

Link to original bug (#111733)

Description

There is an AMD Radeon RX 5700XT (reference card, made by Sapphire), which has two displays connected: one through HDMI, another through DP. The problem: the GPU sometimes randomly blanks the HDMI display while the computer is in use.

Hardware:
AMD Radeon RX 5700XT (reference card, made by Sapphire)
Dell U2718Q (two of them: one through HDMI, other through DisplayPort)
AMD Ryzen 7 3700X
MSI B450i

Software:
Fedora Workstation 30 x86_64
Gnome 3.32.2
LLVM 9 RC2
Mesa 19.2 RC1

Could be related to this bug: https://bugs.freedesktop.org/show_bug.cgi?id=111481