Ubuntu
xorg-server package

  1. Bug #1802353
  2. Comment #0

Comment 0 for bug 1802353

Revision history for this message
Crati (cratiport) wrote : Ubuntu 18.04 falls back to LLVMpipe (CPU render) with Intel graphics

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 seem 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 after the first update with the latest packages but it is still very problematic, for ex. Eclipse has very severe flashing glitches as it redraws the editor windows.

$ 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 to get 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)