I created an account to chime in here and say I'm having basically the exact same issue. I can't boot into the live USB without setting a nomodeset flag. I can then install, but I can't boot into the actual OS without setting nomodeset. I've tried several workarounds, but nothing has been successful.
-- 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/1793934 Title: Black Screen After A Few Minutes Status in linux package in Ubuntu: Confirmed Bug description: Edit 1: - added "installing mainline linux kernel v4.3.6-wily/" to things I tried I first encountered the issue on Kubuntu 18.04 when I removed my 2nd monitor, the screen went black after 5-30 seconds, forcing me to shutdown the PC by pressing the power button. I tried the following to resolve the black screen issue: - disconnecting the 1st instead of the 2nd monitor - using Ubuntu 18.04 (not Kubuntu) - using Wayland - installing the latest mainline linux kernel 4.19rc4 - installing mainline linux kernel v4.3.6-wily/ The only things that worked so far are: - Having both Monitors connected - nomodeset or recovery mode - using Ubuntu Gnome 16.04 - login via tty/terminal When the PC was turned off for a while, I have to wait for a few minutes or start lots of applications for the black screen to occur. If the PC was restarted several times due to this bug, a blank screen may occur as soon as I see the login screen. The issue also occurs during installation when autodetecting the keyboard type or after selecting the installation type (Minimal Installation or Normal Installation etc.) My Hardware: - ASRock H87 Pro4 - Intel i5-4570 - AMD Radeon R9 390 - 1st Monitor connected via DisplayPort to HDMI adapter cable (or DVI-D) - 2nd Monitor connected via DVI-D cable - Windows 10 is installed on a separate SSD and is working just fine (Although Windows 10 is doing some kind of boot repair when switching from Ubuntu to Windows) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-29-generic 4.15.0-29.31 ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18 Uname: Linux 4.15.0-29-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2031 F.... pulseaudio /dev/snd/controlC1: ubuntu 2031 F.... pulseaudio CasperVersion: 1.394 CurrentDesktop: ubuntu:GNOME Date: Sun Sep 23 06:03:27 2018 LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --- nomodeset keyboard-configuration/layoutcode=de RelatedPackageVersions: linux-restricted-modules-4.15.0-29-generic N/A linux-backports-modules-4.15.0-29-generic N/A linux-firmware 1.173.1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/03/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.20 dmi.board.name: H87 Pro4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.20:bd08/03/2015:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnH87Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1793934/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp