The laptop is an HP 15-ab153nr. Specs: http://support.hp.com/us-en/product/HP-Pavilion-15-Notebook-PC- series/8499302/model/8857403/document/c04773160/
I'm not certain what specific update caused the black screen issue to appear. I know that the problem first appeared between Jan 23 and Feb 1 2016 as I mentioned it in another bug report: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1537308 I was frequently updating the machine in that time frame trying to resolve the other issue, and I recall it taking a couple days to track down the nomodeset workaround, so probably closer to the 23rd. I upgraded from 15.04 to 15.10, and rebooted a couple times without incident. The additional symptoms occurred immediately after the upgrade to 16.04 -- 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/1596216 Title: Black screen on boot; no modeset workaround broken by 16.04 Status in linux package in Ubuntu: Incomplete Bug description: This bug appears to occur in several distros and architectures. On this machine, it appeared somewhere in the last week of January, 2016, after a system update. On boot, the laptop monitor often flickers several times (signal connecting and disconnecting) and always settles onto a full backlight back screen. The screen does not change after that. I found reports that adding nomodeset to the grub parameters would resolve the issue. It does, but the workaround has significant issues in 16.04. The nomodeset parameters conflict with both the amdgpu driver package and the radeon driver package. When the machine boots, it is in 800x600 resolution. While I can add new resolutions, attempting to switch to them with xrandr throws the error "configure crtc0 failed" ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-24-generic 4.4.0-24.43 ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10 Uname: Linux 4.4.0-24-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jbhelfrich 2053 F.... pulseaudio /dev/snd/controlC0: jbhelfrich 2053 F.... pulseaudio CurrentDesktop: MATE Date: Sat Jun 25 14:49:22 2016 HibernationDevice: RESUME=UUID=51835e9e-6087-4108-af31-95e11fc3401c InstallationDate: Installed on 2015-10-30 (238 days ago) InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1) MachineType: HP HP Pavilion Notebook ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic.efi.signed root=UUID=613f6223-b665-4289-9dfa-7b003124dfdf ro quiet splash nomodeset i8042.dumbkbd=1 vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-24-generic N/A linux-backports-modules-4.4.0-24-generic N/A linux-firmware 1.157.1 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-06-24 (1 days ago) dmi.bios.date: 08/06/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F.13 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 80AF dmi.board.vendor: HP dmi.board.version: 81.28 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.13:bd08/06/2015:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80AF:rvr81.28:cvnHP:ct10:cvrChassisVersion: dmi.product.name: HP Pavilion Notebook dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1596216/+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
