gnome-shell/cinnamon crashed with assertion failure ../src/gallium/drivers/radeonsi/si_state_viewport.c:239: si_emit_guardband: Assertion `left <= -1 && top <= -1 && right >= 1 && bottom >= 1' failed.

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 3.28.4-0ubuntu18.04.1, the problem page at https://errors.ubuntu.com/problem/a72ac96e774740ca840ce2bfc8a7bfe99c6d68f3 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

[Tom Reynolds (tomreyn)]

When I returned to my computer (AMD RX580 graphics, amdgpu) after a while (the screen had entered power saving mode), the gnome-shell process (on XWayland) failed.

Unfortunately this crash was not automatically reported by whoopsie / apport and required manual re-submission (bug 1792643). If this was also so for the other (to date only) three reporters, this would explain the low number of reports on errors.ubuntu.com.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Theo Shaw (ttshaw1)]

For what it's worth I'm getting a very similar issue on Linux Mint Cinnamon after the update from 19.1 to 19.2. The error is:

 cinnamon: ../src/gallium/drivers/radeonsi/si_state_viewport.c:239: si_emit_guardband: Assertion `left <= -1 && top <= -1 && right >= 1 && bottom >= 1' failed.

I've found that the positions of monitors in a dual monitor setup dictates whether or not the DE crashes on startup. See this thread: https://github.com/linuxmint/cinnamon/issues/8754 Hopefully the problem is identical for you guys and a patch can fix both issues at once.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Are you really sure this is a duplicate of bug 1836979? They don't sound related.

[Daniel van Vugt (vanvugt)]

Zero crashes after 18.04 so consider it fixed.