When creating a new world, if I click the "open pack folder" button, the pack folder indeed opens (using gnome's file browser), but Minecraft stops responding to clicks or keyboard commands. Eventually I am told by the system that Minecraft has stopped responding.
Environment
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"
Java is version 11.0.7, using 64-bit architecture.
Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz
NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1)
Subsystem: ASUSTeK Computer Inc. GM204 [GeForce GTX 970]
We do not have enough information to find the cause of this issue.
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