This bug was fixed in the package nux - 4.0.8+18.04.20180613.5-0ubuntu1
---------------
nux (4.0.8+18.04.20180613.5-0ubuntu1) bionic; urgency=medium
* debian/50_check_unity_support:
- various changes to fix (LP: #1768610):
+ export LIBGL_ALWAYS_SOFTWARE=1 only on command failure
+ run only when called inside an unity session
-- Marco Trevisan (Treviño) <m...@3v1n0.net> Wed, 13 Jun 2018 12:20:33
+0000
** Changed in: nux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1768610
Title:
leftover conffile forces GNOME is software rendering
Status in nux package in Ubuntu:
Fix Released
Status in xorg package in Ubuntu:
Fix Released
Status in nux source package in Xenial:
Fix Committed
Status in xorg source package in Xenial:
In Progress
Status in nux source package in Artful:
Fix Committed
Status in xorg source package in Artful:
In Progress
Status in nux source package in Bionic:
Fix Released
Status in xorg source package in Bionic:
In Progress
Bug description:
[ Impact ]
GNOME shell and other 3D programs run using software rendering after
unity removal.
This SRU covers only the upgrade case or if nux-tools removal happens
after this update, for people who already upgraded and in broken state
another SRU will follow.
[ Test case - FOR WHO UPGRADES TO BIONIC/ARTFUL ]
· Install xenial
· Upgrade (nux-tools) and ensure that unity is still properly running after
a logout/login cycle.
· Upgrade to bionic or artful
(assuming you're using a GNOME session)
· sudo apt remove nux-tools
· log into your session
. From terminal:
- printenv LIBGL_ALWAYS_SOFTWARE
Should print nothing (and return an error)
Same should happen if you don't remove nux-tools but you change
`/usr/lib/nux/unity_support_test` not to run properly (replace with a script
exiting 1), but you're running a GNOME session.
· If running Unity session instead, ensure that
printenv LIBGL_ALWAYS_SOFTWARE equals 1 in case that you're running
in an environment with no 3d support (VMs are easy tests)
[ Test case - FOR WHO HAS ALREADY UPGRADED TO BIONIC/ARTFUL AND
REMOVED UNITY ]
· remove nux-tools from artful/bionic-release (pre-sru), upgrade,
reinstall nux-tools (no prompt)
· remove nux-tools from bionic-proposed/updates (sru), upgrade, reinstall
nux-tools (nothing should be prompted)
· modify config file, remove nux-tools, upgrade, reinstall nux-tools (should
prompt)
· install nux-tools, upgrade, no prompt
You end up with either no /etc/X11/Xsession.d/50_check_unity_support,
its new contents or you are asked what to do if you've changed it
before. Never the old content.
[ Regression Potential ]
Unity desktops with no 3d support could not start anymore.
===========================
After an upgrade from 17.10 to 18.04, I noticed that all gnome windows
animations were gone. After some digging, it seems that gnome-session
incorrectly assumes that my graphics has no acceleration, when in fact
it does: it's a i5-2520M CPU @ 2.50GHz with Intel integrated graphics
(i915 driver).
I've tried this with and without the xserver-xorg-video-intel package
(a.k.a. Intel driver) with the same behavior.
The output of gnome-session-check-accelerated is: llvmpipe (LLVM 6.0,
256 bits) however the system should have DRM 2.0 capability.
GL checks (e.g. glxinfo, glxgears produce the expected output from a
working DRM system).
mesa-utils and mesa-utils-extra are both installed.
I can't find a work around. Perhaps there is something wrong with my
install/upgrade?
Everything else works fine, although the graphical transitions are no
longer smooth. But it would be nice to restore the expected behavior.
I have attached the log of 'journalctl -b0'
ProblemType: BugDistroRelease: Ubuntu 18.04
Package: gnome-session 3.28.1-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed May 2 13:06:00 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-04-22 (739 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bashSourcePackage: gnome-session
UpgradeStatus: Upgraded to bionic on 2018-04-27 (5 days ago)
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