** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1799102

Title:
  WARNING on boot in Intel GVT-g guest

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When booting Ubuntu Cosmic Cuttlefish 18.10 in an Intel GVT-g Virtual
  Machine, a kernel WARNING appears in dmesg, with the following:

  [    3.563734] WARNING: CPU: 3 PID: 346 at
  drivers/gpu/drm/i915/i915_irq.c:161 gen3_assert_iir_is_zero+0x38/0xa0
  [i915]

  I have not noticed negative effects in the VM, but a kernel WARNING
  probably has relevance.

  While I added a custom EDID to fix resolution, the WARNING happens
  without custom EDID set too. I will add information about the host in
  the next message.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: linux-image-4.18.0-10-generic 4.18.0-10.11
  ProcVersionSignature: User Name 4.18.0-10.11-generic 4.18.12
  Uname: Linux 4.18.0-10-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1896 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Oct 21 19:44:44 2018
  InstallationDate: Installed on 2018-10-18 (3 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 
(20181017.3)
  IwConfig:
   lo        no wireless extensions.
   
   ens8      no wireless extensions.
  Lsusb:
   Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 002 Device 003: ID 46f4:0002  
   Bus 002 Device 002: ID 0627:0001 Adomax Technology Co., Ltd 
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic 
root=UUID=6cb7fc66-eb2c-4203-9d7d-2aa2665911ac ro quiet splash 
drm.edid_firmware=EDID_E1941.bin log_buf_len=16M vt.handoff=1
  RelatedPackageVersions:
   linux-restricted-modules-4.18.0-10-generic N/A
   linux-backports-modules-4.18.0-10-generic  N/A
   linux-firmware                             1.175
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/06/2015
  dmi.bios.vendor: EFI Development Kit II / OVMF
  dmi.bios.version: 0.0.0
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-i440fx-3.0
  dmi.modalias: 
dmi:bvnEFIDevelopmentKitII/OVMF:bvr0.0.0:bd02/06/2015:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-3.0:cvnQEMU:ct1:cvrpc-i440fx-3.0:
  dmi.product.name: Standard PC (i440FX + PIIX, 1996)
  dmi.product.version: pc-i440fx-3.0
  dmi.sys.vendor: QEMU

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