Public bug reported:
i updated today to linux kernel 5.4.0-66-generic.
since then the monitor (HDMI) remains black when switched off and on again.
this can be corrected once, if a virtual text console hasn't been used so far
by switching to a virtual text console and then back to the desktop.
Ubuntu 5.4.0-66.74-generic 5.4.86 (Linux Mint 20, Cinnamon 4.6.7)
lspci-vnvn.log attached
Asrock DeskMini A300
AMD Ryzen 5 2400G with Radeon Vega Graphics × 4
Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon
Vega Mobile Series]
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/bugs/1916919/+attachment/5467067/+files/lspci-vnvn.log
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https://bugs.launchpad.net/bugs/1916919
Title:
after upgrade to 5.4.0-66 monitor remains black after off/on cycle
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