Public bug reported:
When using an external 4K monitor plugged into the mini display port on my Dell
XPS 13 9343 using both the laptop screen and the external monitor (external
monitor is left and laptop screen right), when using all of the following
kernels:
4.4.0-2.16-generic
4.4.0-4.19-generic
4.4.0-6.21-generic
4.4.0-7.22-generic
the external monitor will sometimes blink off for about a second or two,
then back on. What is weird is this seems to only happen when typing
into a gnome-terminal as opposed to firefox or evolution. Simply
changing to a gnome-terminal and typing into it doesn't cause the
blinking, but it might happen immediately or it might take several
minutes.
4.3.0-7.18-generic worked fine and I can go hours and hours in a gnome-
terminal with no issues.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-6-generic 4.4.0-6.21
ProcVersionSignature: Ubuntu 4.4.0-6.21-generic 4.4.1
Uname: Linux 4.4.0-6-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: jamie 5882 F.... pulseaudio
/dev/snd/controlC1: jamie 5882 F.... pulseaudio
/dev/snd/controlC0: jamie 5882 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Feb 19 12:09:28 2016
HibernationDevice: RESUME=UUID=27fa6713-c8c2-4eb8-9766-ba6918bc1cfb
InstallationDate: Installed on 2015-06-13 (250 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Dell Inc. XPS 13 9343
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-6-generic.efi.signed
root=UUID=7bc4dcd2-0bd8-4e42-b8b7-9f1ed6b8a3e9 ro libata.force=noncq kaslr
quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-6-generic N/A
linux-backports-modules-4.4.0-6-generic N/A
linux-firmware 1.156
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-01-12 (38 days ago)
dmi.bios.date: 11/11/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0310JH
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA07:bd11/11/2015:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Medium
Assignee: Joseph Salisbury (jsalisbury)
Status: Triaged
** Affects: linux (Ubuntu Xenial)
Importance: Medium
Assignee: Joseph Salisbury (jsalisbury)
Status: Triaged
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1547619
Title:
Intermittent screen blinking with 4k external mini display port with
4.4 kernels
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