In theory logging into "Ubuntu on Wayland" should avoid the problem.

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https://bugs.launchpad.net/bugs/1813423

Title:
  Frequent system freezing with i915 error "*ERROR* Atomic update
  failure on pipe A"

Status in linux package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Confirmed

Bug description:
  My system keeps freezing on a brand new install of Kubuntu 18.10,
  always with the kern.log error "[drm:intel_pipe_update_end [i915]]
  *ERROR* Atomic update failure on pipe A (start=4120234 end=4120235)
  time 486 us, min 763, max 767, scanline start 760, end 783"

  I think it's probably a duplicate of these bugs which were closed unresolved:
  https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1660619 (closed as it was 
on an older version of Ubuntu)
  https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1671975 (closed because 
it was a duplicate of the first bug)

  It happens far more frequently if I have desktop effects turned on,
  and far less frequently when using a live USB key (at always happens
  eventually though. Usually once every few hours.)

  Please advise how I can help triage / test. My system is a new install
  now, so I'm perfectly willing to modify / reinstall to help testing
  (I've reinstalled 5 times to test things, but never managed to find a
  solution)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: xorg 1:7.7+19ubuntu8
  ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17
  Uname: Linux 4.18.0-13-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13.1
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CompositorRunning: None
  CurrentDesktop: KDE
  Date: Sat Jan 26 14:19:52 2019
  DistUpgraded: Fresh install
  DistroCodename: cosmic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: No
  GraphicsCard:
   Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display 
[8086:0f31] (rev 0e) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Atom Processor Z36xxx/Z37xxx Series 
Graphics & Display [103c:227a]
  InstallationDate: Installed on 2019-01-18 (8 days ago)
  InstallationMedia: Kubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 
(20181017.2)
  MachineType: Hewlett-Packard HP Pavilion 14 Notebook PC
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-13-generic 
root=UUID=2c4bf3d1-1ff2-4345-95c0-c68d0e073df9 ro nogpumanager 
modprobe.blacklist=nouveau,nvidiafb,nvidia-modeset,nvidia-uvm,nvidia 
intel_iommu=igfx_off i915.semaphores=1 i915.enable_fbc=0 i915.modeset=1 
i915.enable_rc=7 i915.enable_dc=2 i915.enable_ppgtt=3 i915.enable_guc_loading=1 
i915.lvds_channel_mode=2 i915.lvds_use_ssc=1 quiet splash vt.handoff=1
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/18/2015
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.42
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 227A
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 76.35
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsyde:bvrF.42:bd03/18/2015:svnHewlett-Packard:pnHPPavilion14NotebookPC:pvr096C110800405F10000620180:rvnHewlett-Packard:rn227A:rvr76.35:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.family: 103C_5335KV G=N L=CON B=HP S=PAV X=Null
  dmi.product.name: HP Pavilion 14 Notebook PC
  dmi.product.sku: J9L01UA#ABL
  dmi.product.version: 096C110800405F10000620180
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.95-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

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