Bug 111733 - AMD Navi10 GPU randomly blanks display connected through HDMI
Summary: AMD Navi10 GPU randomly blanks display connected through HDMI
Status: NEW
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: DRI git
Hardware: All Linux (All)
: not set normal
Assignee: Default DRI bug account
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Reported: 2019-09-18 13:42 UTC by Timur Kristóf
Modified: 2019-09-26 11:26 UTC (History)
1 user (show)

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Description Timur Kristóf 2019-09-18 13:42:19 UTC
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
Comment 1 Timur Kristóf 2019-09-18 13:43:53 UTC
Possible workaround: plug the HDMI out and in again, or hit Super+L to make Gnome lock the screen and put both monitors to idle. Then, upon unlocking, the HDMI monitor can come back.
Comment 2 Timur Kristóf 2019-09-26 11:26:15 UTC
There is no output from amdgpu in dmesg or xorg log, or the journal when this happens.


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