Screen flickering
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
Since upgrading from ubuntu 16.04 to 16.10 the screen (backlight?) is flickering irregularly. It only happens with kernel 4.8.x. No flickering problems when manually switching back to kernel versions 4.4.x at boot.
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: xorg 1:7.7+13ubuntu4
ProcVersionSign
Uname: Linux 4.8.0-37-generic x86_64
NonfreeKernelMo
.proc.driver.
.proc.driver.
.proc.driver.
NVRM version: NVIDIA UNIX x86_64 Kernel Module 367.57 Mon Oct 3 20:37:01 PDT 2016
GCC version: gcc version 6.2.0 20161005 (Ubuntu 6.2.0-5ubuntu12)
.tmp.unity_
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CompizPlugins: No value set for `/apps/
CompositorRunning: compiz
CompositorUnred
CompositorUnred
CurrentDesktop: Unity
Date: Sun Feb 12 11:29:15 2017
DistUpgraded: Fresh install
DistroCodename: yakkety
DistroVariant: ubuntu
ExtraDebuggingI
GraphicsCard:
Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Lenovo 4th Gen Core Processor Integrated Graphics Controller [17aa:502a]
Subsystem: Lenovo GK208M [GeForce GT 740M] [17aa:502a]
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 8087:07dc Intel Corp.
Bus 001 Device 004: ID 04f2:b398 Chicony Electronics Co., Ltd
Bus 001 Device 003: ID 138a:0011 Validity Sensors, Inc. VFS5011 Fingerprint Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20C600JAGE
ProcEnviron:
LANGUAGE=de_DE
PATH=(custom, no user)
XDG_RUNTIME_
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/04/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: J9ET98WW (2.18 )
dmi.board.
dmi.board.name: 20C600JAGE
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 20C600JAGE
dmi.product.
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1
version.
version.
version.
version.
version.
version.
version.
version.
version.
xserver.bootTime: Sun Feb 12 11:28:27 2017
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.4-1ubuntu6.1
affects: | xorg (Ubuntu) → nvidia-graphics-drivers (Ubuntu) |
affects: | nvidia-graphics-drivers (Ubuntu) → linux (Ubuntu) |
tags: | added: kernel-fixed-upstream |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Same issue, although I only have Intel graphics. Adding i915.enable_psr=0 to the kernel parameter line fixed the flickering for me.
This is apparently solved upstream in kernel 4.9: https:/ /patchwork. kernel. org/patch/ 9507451/