** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1918466
Title:
Garbage window on external 4k display
Status in linux package in Ubuntu:
Confirmed
Bug description:
When connecting a 4k monitor to the DP port of a Lenovo TBT3 Gen2 dock and
dock is connected to a P17 also with a 4k display if you change the scale to
100% and attempt to run any window based application like a browser window on
the monitor you get periodic pop up areas of garbage. Happens more if the
window is closer to the left side than if in the middle of the screen.
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: z 2161 F.... pulseaudio
/dev/snd/controlC0: z 2161 F.... pulseaudio
/dev/snd/controlC1: z 2161 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistributionChannelDescriptor:
# This is the distribution channel descriptor for the OEM CDs
# For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-sutton-focal-amd64-20201012-119+sutton-simon-focal-amd64+iso
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2021-01-04 (65 days ago)
InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary
20201012-17:03
MachineType: LENOVO 20SNZ5GCUS
NonfreeKernelModules: nvidia_modeset nvidia
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1033-oem
root=UUID=79aeb320-7842-4144-b3d7-30a10d0f8d0e ro quiet splash
ProcVersionSignature: Ubuntu 5.6.0-1033.35-oem 5.6.19
RelatedPackageVersions:
linux-restricted-modules-5.6.0-1033-oem N/A
linux-backports-modules-5.6.0-1033-oem N/A
linux-firmware 1.187.6
Tags: focal
Uname: Linux 5.6.0-1033-oem x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/26/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N30ET32W (1.15 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20SNZ5GCUS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN30ET32W(1.15):bd10/26/2020:svnLENOVO:pn20SNZ5GCUS:pvrThinkPadP17Gen1:rvnLENOVO:rn20SNZ5GCUS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad P17 Gen 1
dmi.product.name: 20SNZ5GCUS
dmi.product.sku: LENOVO_MT_20SN_BU_Think_FM_ThinkPad P17 Gen 1
dmi.product.version: ThinkPad P17 Gen 1
dmi.sys.vendor: LENOVO
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