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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1916919 Title: after upgrade to 5.4.0-66 monitor remains black after off/on cycle Status in linux package in Ubuntu: Incomplete Bug description: 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] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1916919/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp