I can confirm that the workaround: $ gsettings set org.gnome.settings-daemon.plugins.xsettings antialiasing 'grayscale' followed by logout+login. does stop the crashes.
Note: To stop Intellij IDEA / Android Studio from crashing the system, it necessary to set Antialiasing to Greyscale in Settings / Appearance & Behaviour / Appearance, as suggested in https://gitlab.freedesktop.org/mesa/mesa/issues/2183 Thanks very much to everyone for helping sort this out, and I look forward to receive an official software update for this. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1878670 Title: Reproduceable i915 gpu hang Intel Iris Plus Graphics (Ice Lake 8x8 GT2) Status in OEM Priority Project: Incomplete Status in linux package in Ubuntu: Triaged Status in linux-oem-osp1 package in Ubuntu: New Bug description: The system freezes frequently then logs out. If happens at apparently random times, and using no particular app. Extract of syslog is attached. Requested info is below: 1) release Ubuntu 18.04.2 LTS (beaver-osp1-melisa X30) 2) package version gnome-session: Installeret: (ingen) Kandidat: 3.28.1-0ubuntu3 Versionstabel: 3.28.1-0ubuntu3 500 500 http://dk.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages 3.28.1-0ubuntu2 500 500 http://dk.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages 3) Gnome shouldn't crash 4) Gnome crashed To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1878670/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp