Ubuntu

Display blinks black from time to time

Bug #1901296 reported by Lyubomir on 2020-10-24

This bug report is a duplicate of: Bug #1550779: Black screen flickering and [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	Ubuntu	Incomplete	Undecided	Unassigned

Bug Description

I have an issue since about a week or so, the display blinks black, like it's turning off and on again. The black blink lasts for not more than a second. I haven't managed to reproduce it in UEFI yet, so i believe it might not be a hardware issue.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-52.57-lowlatency 5.4.65
Uname: Linux 5.4.0-52-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 24 12:29:59 2020
DistUpgraded: 2020-10-23 18:35:32,104 DEBUG /openCache(), new cache size 66443
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
nvidia, 450.80.02, 5.4.0-51-lowlatency, x86_64: installed
nvidia, 450.80.02, 5.4.0-52-lowlatency, x86_64: installed
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] UHD Graphics 620 [1025:1193]
Subsystem: Acer Incorporated [ALI] GP108M [GeForce MX150] [1025:119a]
InstallationDate: Installed on 2020-02-08 (258 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: Acer Aspire A515-51G
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-52-lowlatency root=/dev/mapper/vgubuntu-root ro quiet splash resume=UUID=f0e63db4-d3af-4977-a82a-5a46a3c677ae lockdown=confidentiality intel_iommu=on
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-10-23 (0 days ago)
dmi.bios.date: 01/03/2019
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V2.02
dmi.board.asset.tag: Type2 - Board Serial Number
dmi.board.name: Charmander_KL
dmi.board.vendor: KBL
dmi.board.version: V2.02
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.02
dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.02:bd01/03/2019:svnAcer:pnAspireA515-51G:pvrV2.02:rvnKBL:rnCharmander_KL:rvrV2.02:cvnAcer:ct10:cvrV2.02:
dmi.product.family: Aspire 5
dmi.product.name: Aspire A515-51G
dmi.product.sku: 0000000000000000
dmi.product.version: V2.02
dmi.sys.vendor: Acer
mtime.conffile..etc.apport.crashdb.conf: 2020-05-15T09:41:35.683742
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

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Revision history for this message

Lyubomir (mystiquewolf) wrote on 2020-10-24:

CurrentDmesg.txt Edit (200.4 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (23.1 KiB, text/plain; charset="utf-8")
DpkgLog.txt Edit (402.7 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (12.2 KiB, text/plain; charset="utf-8")
Lspci-vt.txt Edit (1.2 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (365 bytes, text/plain; charset="utf-8")
Lsusb-t.txt Edit (680 bytes, text/plain; charset="utf-8")
Lsusb-v.txt Edit (38.1 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (10.1 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.3 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (290 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (4.8 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (8.8 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (221.3 KiB, text/plain; charset="utf-8")
XorgLog.txt Edit (58.5 KiB, text/plain; charset="utf-8")
XorgLogOld.txt Edit (97.9 KiB, text/plain; charset="utf-8")
Xrandr.txt Edit (719 bytes, text/plain; charset="utf-8")
acpidump.txt Edit (1.1 MiB, text/plain; charset="utf-8")
modified.conffile..etc.apport.crashdb.conf.txt Edit (1.2 KiB, text/plain; charset="utf-8")
xdpyinfo.txt Edit (66.2 KiB, text/plain; charset="utf-8")

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2020-10-26:

1. Does the problem only happen in Wayland, or only happen in Xorg sessions?

2. Next time blinking occurs please immediately open a Terminal window and run:

journalctl -b0 > journal.txt

and attach the resulting text file here.

affects:	xorg (Ubuntu) → ubuntu
Changed in ubuntu:
status:	New → Incomplete

Revision history for this message

Lyubomir (mystiquewolf) wrote on 2020-10-26:

journal.txt Edit (35.6 MiB, text/plain)

Attaching it

Revision history for this message

Lyubomir (mystiquewolf) wrote on 2020-10-26:

Another one: https://drive.google.com/file/d/16rqyhIZATQebPcirN6UQD8bXnyy_KwT5/view?usp=sharing
Do you want to attach it?

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2020-10-27:

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1550779, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2020-10-27:

As a workaround, please try selecting 'Ubuntu on Wayland' from the login screen (before you enter your password).