video stutter when running NordVPN Connect

Bug #1876910 reported by Emil Resamann on 2020-05-05
This bug affects 1 person
Affects Status Importance Assigned to Milestone
mutter (Ubuntu)

Bug Description

System works fine util Suspend.
After wake up from Suspend video on display stutters.
Video (e.g. in browser) freezes approximately once every second, and freeze lasts for about 100 millisecond.
If you drag an icon or a window over the desktop, the icon will stutter, but the cursor will not stutter.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Tue May 5 13:49:30 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
 Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] HD Graphics 5500 [1025:095d]
InstallationDate: Installed on 2020-04-27 (8 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Acer TravelMate P236-M
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install) 08/10/2015
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.17
dmi.board.asset.tag: No Asset Tag TravelMate P236-M
dmi.board.vendor: Acer
dmi.board.version: V1.17
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.17
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.17:bd08/10/2015:svnAcer:pnTravelMateP236-M:pvrV1.17:rvnAcer:rnTravelMateP236-M:rvrV1.17:cvnAcer:ct10:cvrV1.17: BDW TravelMate P236-M
dmi.product.sku: TravelMate P236-M_095D_1.17
dmi.product.version: V1.17
dmi.sys.vendor: Acer
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

Emil Resamann (emilresmann73) wrote :
affects: ubuntu → xorg (Ubuntu)
Daniel van Vugt (vanvugt) wrote :

Moving to mutter. Because the cursor doesn't have the stutter and that's moved by Xorg. The rest of the screen is rendered by mutter.

affects: xorg (Ubuntu) → mutter (Ubuntu)
Daniel van Vugt (vanvugt) wrote :

When the stutter is happening can you please check:

 * Is any process now using very high CPU? (run 'top' in a Terminal)

 * Does running 'dmesg -w' in a Terminal show any new errors?

 * Does running 'journalctl -f' in a Terminal show any new errors?

 * That you don't have any extensions installed, other than the default Ubuntu ones.

Changed in mutter (Ubuntu):
status: New → Incomplete
tags: added: performance suspend suspend-resume
Daniel van Vugt (vanvugt) wrote :

Please also try selecting 'Ubuntu on Wayland' from the login screen. Does that avoid the bug?

Emil Resamann (emilresmann73) wrote :

I removed all extensions, an this seems to solve the problem.
I then reinstalled my extensions one by one.
The extension causing the problem seems to be: NordVPN Connect by poilrouge.
When running "NordVPN Connect", error only occurs after screen lock and wake up.
When error occurs, there are no error messages, and no high CPU load.

Launchpad Janitor (janitor) wrote :

[Expired for mutter (Ubuntu) because there has been no activity for 60 days.]

Changed in mutter (Ubuntu):
status: Incomplete → Expired
Changed in mutter (Ubuntu):
status: Expired → Invalid
summary: - video stutter
+ video stutter when running NordVPN Connect
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