Ok I fixed the problem on my system. This has nothing to do with libglvnd but I don't know to which package it should be attributed. Problem (at least for me) seems to be linked to
/etc/X11/Xsession.d/50_check_unity_support that fails (as I had uninstalled unity after update) and causes Xsession to fall-back on LLVMPipe. Remove or comment that file and accelerated drivers are back OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2) Hope this helps, and that someone more experienced can tag the appropriate package so that the update removes this leftover check. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libglvnd in Ubuntu. https://bugs.launchpad.net/bugs/1767468 Title: Upgrade from 16.04 to 18.04 disables hardware acceleration on Intel Graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libglvnd/+bug/1767468/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
