It's difficult because it seems only certain laptop models will be
affected very often. And while no developers are affected by the bug
then it's unlikely to get fixed. Because nobody with the ability to fix
the bug has the hardware to reproduce the bug.

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https://bugs.launchpad.net/bugs/1806242

Title:
  kernel: [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update
  failure on pipe A/B/C

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

Bug description:
  I have this error and arbitrary freezes on the system

  My System:

  Hardware:
  Processor: Intel Core i7-8750H @ 4.10GHz (12 Cores), Motherboard: Dell 
0M2MWX, Chipset: Intel Device a36f, Memory: 16384MB, Disk: 1000GB Seagate 
ST1000LM035-1RK1 + 256GB TOSHIBA KSG60ZMV, Graphics: Intel Device 3e9b, Audio: 
Realtek ALC3246, Monitor: DELL P2016, Network: Qualcomm Atheros Killer E2400 
Gigabit + Intel Device a370

  Software:
  OS: Ubuntu 18.04, Kernel: 4.15.0-39-generic (x86_64), Desktop: Xfce 4.12, 
Display Driver: modesetting 1.19.6, OpenGL: 4.5 Mesa 18.0.5, File-System: ext4, 
Screen Resolution: 1920x1980

  dmesg output:

  Dec  2 16:00:22 G5 kernel: [ 2027.018608] [drm:intel_pipe_update_end [i915]] 
*ERROR* Atomic update failure on pipe B (start=15726 end=15727) time 1024 us, 
min 894, max 899, scanline start 845, end 903
  Dec  2 16:08:50 G5 kernel: [ 2534.448063] ACPI Error: [LCD_] Namespace lookup 
failure, AE_NOT_FOUND (20170831/psargs-364)
  Dec  2 16:08:50 G5 kernel: [ 2534.448071] No Local Variables are initialized 
for Method [BRT6]
  Dec  2 16:08:50 G5 kernel: [ 2534.448072] Initialized Arguments for Method 
[BRT6]:  (2 arguments defined for method invocation)
  Dec  2 16:08:50 G5 kernel: [ 2534.448073]   Arg0:   00000000a83faa08 <Obj>    
       Integer 0000000000000001
  Dec  2 16:08:50 G5 kernel: [ 2534.448076]   Arg1:   0000000035246c42 <Obj>    
       Integer 0000000000000000
  Dec  2 16:08:50 G5 kernel: [ 2534.448079] ACPI Error: Method parse/execution 
failed \_SB.PCI0.PEG0.PEGP.BRT6, AE_NOT_FOUND (20170831/psparse-550)
  Dec  2 16:08:50 G5 kernel: [ 2534.448145] ACPI Error: Method parse/execution 
failed \EV5, AE_NOT_FOUND (20170831/psparse-550)
  Dec  2 16:08:50 G5 kernel: [ 2534.448206] ACPI Error: Method parse/execution 
failed \SMEE, AE_NOT_FOUND (20170831/psparse-550)
  Dec  2 16:08:50 G5 kernel: [ 2534.448268] ACPI Error: Method parse/execution 
failed \SMIE, AE_NOT_FOUND (20170831/psparse-550)
  Dec  2 16:08:50 G5 kernel: [ 2534.448332] ACPI Error: Method parse/execution 
failed \NEVT, AE_NOT_FOUND (20170831/psparse-550)
  Dec  2 16:08:50 G5 kernel: [ 2534.448394] ACPI Error: Method parse/execution 
failed \_SB.PCI0.LPCB.ECDV._Q66, AE_NOT_FOUND (20170831/psparse-550)
  Dec  2 16:14:41 G5 kernel: [ 2885.660715] acpi INT3400:00: Unsupported event 
[0x86]
  Dec  2 16:14:45 G5 kernel: [ 2889.787584] acpi INT3400:00: Unsupported event 
[0x86]
  Dec  2 16:20:32 G5 kernel: [ 3237.026638] [drm:intel_pipe_update_end [i915]] 
*ERROR* Atomic update failure on pipe B (start=88190 end=88191) time 1687 us, 
min 894, max 899, scanline start 864, end 14
  Dec  2 16:22:20 G5 kernel: [ 3344.842212] wlp0s20f3: AP 90:ef:68:2c:31:9b 
changed bandwidth, new config is 2432 MHz, width 2 (2422/0 MHz)
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  instantcrush   1622 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2018-11-28 (4 days ago)
  InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  MachineType: Dell Inc. G5 5587
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-39-generic 
root=UUID=0017db25-edad-4311-bca6-171f2624432e ro quiet splash vt.handoff=1
  ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-39-generic N/A
   linux-backports-modules-4.15.0-39-generic  N/A
   linux-firmware                             1.173.2
  Tags:  bionic
  Uname: Linux 4.15.0-39-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 11/01/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.6.1
  dmi.board.name: 0M2MWX
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.6.1:bd11/01/2018:svnDellInc.:pnG55587:pvr:rvnDellInc.:rn0M2MWX:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: GSeries
  dmi.product.name: G5 5587
  dmi.sys.vendor: Dell Inc.

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