*** This bug is a duplicate of bug 1826125 ***
https://bugs.launchpad.net/bugs/1826125
I have some doubt that this is a duplicate of bug 1826125, though I see
how they are similar. I'm experiencing the same issue described in this
bug, and the visual effect is quite different than the photos and videos
attached to the other bug. In the other one, the issue appears to
involve different parts of the display flickering around, or different
parts of the screen getting "out of sync" so it looks like there are
horizontal bands. The problem in the other bug is also described as
quite frequent/constant.
I'm not experiencing any of that, but I am experiencing what Daniel C
describes in this bug: my entire screen flashes quite brightly for a
split second, then calms back down. The effect is uniform across the
screen, there's no banding or shifting that I can see. It only happens
once every few minutes, not constantly as described in the other bug.
The flashing is most noticeable when the "Night Light" effect is active
in the evening, though I believe I've also seen it happen during the
day.
One other important distinction: like Daniel C, I have an XPS 9380 with
the non-touch 1080p display, and I wiped Dell's pre-installed 18.04 and
installed 19.04 instead. The other bug has several references in the
comments to it affecting the XPS 9380 with the "4k" display. So I
believe the flashing described in this bug is a different problem with a
different panel.
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https://bugs.launchpad.net/bugs/1827790
Title:
Dell XPS 13 9380 - Screen flashes
Status in xorg package in Ubuntu:
Confirmed
Bug description:
Hello,
I have a new 2019 Dell XPS 13 (9380). I ordered the official Ubuntu
edition from Dell which came with 18.04, but I've since wiped it and
installed 19.04 from a fresh ISO download. This is the non-touch non-
4K version (13-inch 1080p).
Every so often (maybe a couple of times per minute), the screen
flashes brighter, as if the brightness has been turned up momentarily
and then back down again.
I previously had an issue with the brightness / colours changing
slightly when I opened menus or if the screen content changed
slightly, but I fixed that by disabling Dynamic Brightness in the
BIOS. It is definitely a better experience with that turned off.
However the screen flashing still persists.
I booted a live image of Fedora 30 now that it has been released, and
so far I have not seen the screen flashing, so I do not think the
hardware is faulty.
I ran apport-bug, so hopefully the collected information has been
attached.
Thank you.
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun May 5 15:59:45 2019
DistUpgraded: Fresh install
DistroCodename: disco
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation UHD Graphics 620 (Whiskey Lake) [8086:3ea0] (prog-if 00
[VGA controller])
Subsystem: Dell UHD Graphics 620 (Whiskey Lake) [1028:08af]
InstallationDate: Installed on 2019-04-28 (6 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: Dell Inc. XPS 13 9380
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-13-generic
root=UUID=fcb75d61-4e46-4391-8800-ccef7ff04f70 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/29/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.2
dmi.board.name: 0KTW76
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.3.2:bd03/29/2019:svnDellInc.:pnXPS139380:pvr:rvnDellInc.:rn0KTW76:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9380
dmi.product.sku: 08AF
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.97-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.2-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.4-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20180925-2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
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