GNOME Will No Longer Crash If Attaching A Monitor While The System Is Suspended
Written by Michael Larabel in GNOME on 28 June 2018 at 09:13 AM EDT. 32 Comments
GNOME --
On GNOME 3.26~3.28, if attaching a monitor to the system while suspended -- such as when setting up for a presentation with a laptop and projector/monitor -- when resuming the system, GNOME Shell would likely crash. That rather glaring bug has now been fixed in the newest Mutter code.

Bug #786929 that dates back nearly one year is now resolved. The issue comes down to "Attaching a monitor to laptop while in suspend and then waking up laptop will reliably crash gnome-shell."

This crash has been resolved in the Mutter back-end code by better tracking of each logical monitor to all monitors assigned to it. All monitors have a reference to each output and each output has a reference to any CRTC. With that better reference tracking, it should avoid a race condition on events between the display hot-plug event and trying to access the associated state.

That code is now merged into Mutter for what will be part of GNOME 3.30 in September.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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