FFab, thank you for reporting this and helping make Ubuntu better.
To clarify your Bug Description:
>"When booting the screen is black – backlight on – off - on."
Are you noting that the laptop LCD backlight goes from 0% brightness to
100% automatically? If so, how often does it cycle between the two?
If so, as per your attachment
https://launchpadlibrarian.net/292333261/CurrentDmesg.txt :
[0.576786] [Firmware Bug]: ACPI: No _BQC method, cannot determine initial
brightness
** This bug is no longer a duplicate of bug 1597079
[HP Pavilion Notebook - 15-ab141na] Black Screen when Booting
** Summary changed:
- black screen when booting
+ [HP Pavilion Notebook - 17-g164ng] black screen when booting
** Tags added: latest-bios-f.41
** Description changed:
- My notebook is a HP Pavilion 17-g164ng with an AMD A10-8780P APU and 2
- graphic subsystems - Carrizo, a VGA compatible controller and Topaz.
-
- When booting the screen is black – backlight on – off - on.
- When HDD is inactive
- - keyboard is not locked and I can shutdown/reboot by Alt + Print +o/b or
Strg + Alt + Del
+ When booting the screen is black – backlight on – off - on.
+ When HDD is inactive
+ - keyboard is not locked and I can shutdown/reboot by Alt + Print +o/b or
Strg + Alt + Del
- remote access e.g. using ssh is possible
-
Testsystems: Ubuntu/Kubuntu 14.04, 15.10, 16.04, 16.10.
-
- Workaround, UEFI-boot, kernel parameters :
- nomodeset
- nomodeset xforcevesa
- Resolution without/with xforcevesa: 800x600 / 1600x900 – the optimal
resolution
+ My notebook is a HP Pavilion 17-g164ng with an AMD A10-8780P APU and 2
+ graphic subsystems - Carrizo, a VGA compatible controller and Topaz.
In 14.04 and 15.10 I installed fglrx – the AMD driver.
It seems very similar to that described in #1597079.
The bug report was generated from a remote PC. My HP notebook was started
without any workaround parameters.
- This apport does'nt display the second graphic subsystem Topaz R7 as an
apport generated with nomodeset xforcevesa.
+ This apport doesn't display the second graphic subsystem Topaz R7 as an
apport generated with nomodeset xforcevesa.
+
+ WORKAROUND: When booting in UEFI mode, use kernel parameters:
+ nomodeset
+
+ or:
+ nomodeset xforcevesa
+
+ Resolution without xforcevesa: 800x600
+ Resolution with xforcevesa: 1600x900 – the optimal resolution
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sat Nov 5 23:40:19 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
- Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c4) (prog-if
00 [VGA controller])
-Subsystem: Hewlett-Packard Company Carrizo [103c:80b6]
+ Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c4) (prog-if
00 [VGA controller])
+ Subsystem: Hewlett-Packard Company Carrizo [103c:80b6]
InstallationDate: Installed on 2016-11-03 (2 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
MachineType: HP HP Pavilion Notebook
ProcEnviron:
- TERM=xterm
- PATH=(custom, no user)
- LANG=de_DE.UTF-8
- SHELL=/bin/bash
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=de_DE.UTF-8
+ SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-45-generic.efi.signed
root=UUID=d006dbb4-8a2a-4cfe-b38e-7d35b34bca09 ro quiet splash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/19/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.41
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 80B6
dmi.board.vendor: HP
dmi.board.version: 81.32
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF.41:bd09/19/2016:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80B6:rvr81.32:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion Notebook
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel