apport information

** Attachment added: "xserver.devices.txt"
   
https://bugs.launchpad.net/bugs/1802353/+attachment/5210703/+files/xserver.devices.txt

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https://bugs.launchpad.net/bugs/1802353

Title:
  Ubuntu 18.04 falls back to LLVMpipe (CPU render) with Intel graphics
  (i9-9900k => UHD-630)

Status in xorg-server package in Ubuntu:
  Incomplete

Bug description:
  A fresh Xubuntu 18.04.1 install (from an ISO), on a machine with only the 
Intel integrated graphics  (i9-9900k => UHD-630). The graphic drivers module 
seems to be properly loaded, but X rendering seems to fallback to LLVMpipe.
  This was the case immediately after the install. The performance of the SW 
rendering improved significantly after the first update with the latest 
packages.

  $ glxinfo | grep "OpenGL"
  OpenGL vendor string: VMware, Inc.
  OpenGL renderer string: llvmpipe (LLVM 6.0, 256 bits)
  OpenGL version string: 3.0 Mesa 18.0.5
  OpenGL shading language version string: 1.30
  OpenGL context flags: (none)

  dmesg output:
  [    4.725296] [drm] Replacing VGA console driver
  [    4.731702] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
  [    4.731704] [drm] Driver supports precise vblank timestamp query.
  [    4.733885] i915 0000:00:02.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=io+mem:owns=io+mem
  [    4.734288] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_01.bin 
(v1.1)
  [    5.003709] [drm] failed to retrieve link info, disabling eDP
  [    5.004608] [drm] Initialized i915 1.6.0 20171023 for 0000:00:02.0 on 
minor 0
  [    5.005628] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
  [    5.005799] input: Video Bus as 
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input5
  [    5.174759] fbcon: inteldrmfb (fb0) is primary device
  [    5.209969] Console: switching to colour frame buffer device 320x90
  [    5.229823] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device

  I tried using the latest stable mesa from ubuntu-x-swat/updates but it
  did not help (I ppa-purge'd it before generating the bug report)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: libegl1 1.0.0-2ubuntu2.2
  ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
  Uname: Linux 4.15.0-38-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Thu Nov  8 17:52:03 2018
  InstallationDate: Installed on 2018-11-06 (2 days ago)
  InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  SourcePackage: libglvnd
  UpgradeStatus: No upgrade log present (probably fresh install)

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