hmmm ok. testing is proving difficult. I'm running zfs root, and zfs-
dkms won't build on the current 5.4-rc, it does all the config step, but
on build it just says "kernel package linux-
headers-5.4.0-050400rc5-generic is not supported". any suggestions?

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https://bugs.launchpad.net/bugs/1849751

Title:
  [i915] doesn't boot after 19.10 upgrade

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  after upgrading to ubuntu 19.10, vulkan support when using the intel
  card in my laptop is broken. running any of my example vulkan apps
  shows the following error:

  $ vkcube
  vkcube: 
/build/vulkan-tools-IZAxVX/vulkan-tools-1.1.114.0+dfsg1/cube/cube.c:3175: 
demo_init_vk: Assertion `!err' failed.
  Aborted (core dumped)

  note that since the update I can no longer boot my system at all
  without adding "nomodeset" the kernel params, something is broken in
  the intel modeset driver since 19.04. so this may very well be
  related.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: mesa-vulkan-drivers 19.2.1-1ubuntu1
  ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
  Uname: Linux 5.3.0-19-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu8
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Oct 24 20:04:54 2019
  DistUpgraded: 2019-10-23 18:54:04,373 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: eoan
  DistroVariant: ubuntu
  DkmsStatus: zfs, 0.8.1, 5.3.0-19-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation HD Graphics 630 [8086:591b] (rev 04) (prog-if 00 [VGA 
controller])
     Subsystem: CLEVO/KAPOK Computer HD Graphics 630 [1558:65a1]
   NVIDIA Corporation GP104BM [GeForce GTX 1070 Mobile] [10de:1be1] (rev a1) 
(prog-if 00 [VGA controller])
     Subsystem: CLEVO/KAPOK Computer GP104BM [GeForce GTX 1070 Mobile] 
[1558:65a3]
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 04f2:b5a7 Chicony Electronics Co., Ltd Chicony USB 
2.0 Camera
   Bus 001 Device 003: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 002: ID 1c7a:0603 LighTuning Technology Inc. EgisTec_ES603
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: System76 Oryx Pro
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-19-generic root=ZFS=rpool/root 
ro root=ZFS=rpool/root quiet nomodeset
  SourcePackage: mesa
  UpgradeStatus: Upgraded to eoan on 2019-10-23 (1 days ago)
  dmi.bios.date: 02/20/2017
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.05.02dRSA2
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: Oryx Pro
  dmi.board.vendor: System76
  dmi.board.version: oryp3-ess
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: System76
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.05.02dRSA2:bd02/20/2017:svnSystem76:pnOryxPro:pvroryp3-ess:rvnSystem76:rnOryxPro:rvroryp3-ess:cvnSystem76:ct10:cvrN/A:
  dmi.product.family: Not Applicable
  dmi.product.name: Oryx Pro
  dmi.product.sku: Not Applicable
  dmi.product.version: oryp3-ess
  dmi.sys.vendor: System76
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.99-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.1-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 19.2.1-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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