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At random intervals the screen suddenly pixelates.

The issue does not happen when using the linux kernel v4.17.19-041719
but happens when using other kernels greater than v4.17.19-041719 upto
and including 5.0.0-8.9

Please let me know if you need any other logs and I can provide the

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
Uname: Linux 5.0.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CompositorRunning: None
Date: Fri Apr 12 21:25:09 2019
DistUpgraded: 2019-02-16 12:12:04,532 DEBUG confirmRestart() called
DistroCodename: disco
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 
0b) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Haswell-ULT Integrated Graphics 
Controller [103c:198f]
InstallationDate: Installed on 2018-11-07 (156 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: Hewlett-Packard HP EliteBook 840 G1
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-8-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
SourcePackage: xorg
UpgradeStatus: Upgraded to disco on 2019-02-16 (55 days ago) 01/24/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L71 Ver. 01.06 198F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 15.52
dmi.chassis.asset.tag: CNU4079SS2
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi:bvnHewlett-Packard:bvrL71Ver.01.06:bd01/24/2014:svnHewlett-Packard:pnHPEliteBook840G1:pvrA3009DD10303:rvnHewlett-Packard:rn198F:rvrKBCVersion15.52:cvnHewlett-Packard:ct10:cvr: 103C_5336AN G=N L=BUS B=HP S=ELI HP EliteBook 840 G1
dmi.product.sku: G3C37US#ABA
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.97+git1904121830.210bfd~oibaf~d
version.libgl1-mesa-dri: libgl1-mesa-dri 19.1~git1904121930.f4fc2e~oibaf~d
version.libgl1-mesa-glx: libgl1-mesa-glx 19.1~git1904121930.f4fc2e~oibaf~d
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 
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

** Tags: amd64 apport-bug disco third-party-packages ubuntu
Screen pixelation with linux kernel > 4.17.19-041719
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