It looks like your kernel command line might be to blame:
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic
root=UUID=8258f7ec-7593-4407-95b1-cf77cc95da6c ro nogpumanager quiet
splash nouveau.runpm=0 vt.handoff=1
Please:
1. Remove "nogpumanager" and "nouveau.runpm=0" from /etc/default/grub
2. Run: sudo update-grub
3. Reboot
4. Tell us if the problem persists.
** Package changed: xorg (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1767228
Title:
Plasma Could Not Correctly Use OpenGL 2 after upgrading to 18.04
Status in Ubuntu:
Incomplete
Bug description:
After I upgrade Kubuntu from 17.10 to 18.04, and restarted it, all I'm
seeing is my mouse cursor, which responds to my movements, and that's
pretty much it. I tried to see if I can start up sddm, but that
failed.
I got to login by installing slick-greeter and use that instead.
After logging in, the message says:
<blockquote>
Plasma is unable to start as it could not correctly use OpenGL 2. Please
check that your graphics drivers are set up correctly.
</blockquote>
I checked the environment variable `$DISPLAY`, but it seems to be
unset.
I tried reinstalling `plasma-desktop`, `sddm`, `mesa` drivers, `xorg`,
`xserver-xorg*intel`, `kde*`, `kwin`, and `nvidia-340` drivers.
My laptop is a Lenovo Z40 with NVIDIA GT810m (currently disabled and
using Intel HD Graphics).
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
Date: Thu Apr 26 20:51:46 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
bcmwl, 6.30.223.271+bdcom, 4.15.0-20-generic, x86_64: installed
nvidia-340, 340.106, 4.15.0-20-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16]
(rev 0b) (prog-if 00 [VGA controller])
Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:380d]
Subsystem: Lenovo GeForce 820M [17aa:380d]
InstallationDate: Installed on 2017-04-11 (380 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170411)
MachineType: LENOVO 20366
ProcEnviron:
LANGUAGE=en_CA:en
TERM=linux
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic
root=UUID=8258f7ec-7593-4407-95b1-cf77cc95da6c ro nogpumanager quiet splash
nouveau.runpm=0 vt.handoff=1
Renderer: Software
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/21/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: 9BCN91WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lancer 4A5
dmi.board.vendor: LENOVO
dmi.board.version: 31900058STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Z40-70
dmi.modalias:
dmi:bvnLENOVO:bvr9BCN91WW:bd07/21/2015:svnLENOVO:pn20366:pvrLenovoZ40-70:rvnLENOVO:rnLancer4A5:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoZ40-70:
dmi.product.family: IDEAPAD
dmi.product.name: 20366
dmi.product.version: Lenovo Z40-70
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
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