Joe Helfrifch, the next step is to fully commit bisect from kernel 4.2
to 4.4 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ?
Please note, finding adjacent kernel versions is not fully commit
Also, the kernel release names are irrelevant for the purposes of
It is most helpful that after the fix commit (not kernel version) has
been identified, you then mark this report Status Confirmed.
Thank you for your help.
** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
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Black screen on boot; no modeset workaround broken by 16.04
Status in linux package in Ubuntu:
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
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
USER PID ACCESS COMMAND
/dev/snd/controlC1: jbhelfrich 2053 F.... pulseaudio
/dev/snd/controlC0: jbhelfrich 2053 F.... pulseaudio
Date: Sat Jun 25 14:49:22 2016
InstallationDate: Installed on 2015-10-30 (238 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64
MachineType: HP HP Pavilion Notebook
ProcFB: 0 EFI VGA
root=UUID=613f6223-b665-4289-9dfa-7b003124dfdf ro quiet splash nomodeset
UpgradeStatus: Upgraded to xenial on 2016-06-24 (1 days ago)
dmi.bios.vendor: American Megatrends Inc.
dmi.board.asset.tag: Base Board Asset Tag
dmi.chassis.version: Chassis Version
dmi.product.name: HP Pavilion Notebook
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