Laptop suspended while connected to TV via HDMI and backlight went out

[David O'Connor]

Backlight now non functional even when rebooting. No backlight in bios screen or when OS boots

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-4.8.0-37-generic 4.8.0-37.39
ProcVersionSignature: Ubuntu 4.8.0-37.39-generic 4.8.16
Uname: Linux 4.8.0-37-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: doc 7697 F...m pulseaudio
 /dev/snd/controlC0: doc 7697 F.... pulseaudio
CurrentDesktop: XFCE
Date: Sun Feb 5 00:54:51 2017
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=3baeb745-d8b3-48bb-ab61-e6104afb4154
InstallationDate: Installed on 2017-01-06 (29 days ago)
InstallationMedia: Xubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 04f2:b52d Chicony Electronics Co., Ltd
 Bus 001 Device 002: ID 8087:0a2a Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: HP HP 250 G5 Notebook PC
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-37-generic.efi.signed root=/dev/mapper/xubuntu--vg-root ro quiet splash acpi_backlight=vendor acpi_osi=Linux video.use_native_backlight=0 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.8.0-37-generic N/A
 linux-backports-modules-4.8.0-37-generic N/A
 linux-firmware 1.161.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/01/2016
dmi.bios.vendor: Insyde
dmi.bios.version: F.14
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81EB
dmi.board.vendor: HP
dmi.board.version: 61.30
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.14:bd08/01/2016:svnHP:pnHP250G5NotebookPC:pvrType1ProductConfigId:rvnHP:rn81EB:rvr61.30:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP 250 G5 Notebook PC
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc7

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]