The problem: Recently upgraded from 18.04 to 20.04, mostly without issue except one.After a screen lock, returning to Slack displays many of the panes (sidebar, some channels) black. Exiting Slack and restarting appears to solve it, but it's annoying .... Slack was fine before upgrading to 20.04. Purged and reinstalled both Nvidia drivers and Slack, no love. I believe this to be an Nvidia driver issue but cannot confirm.
Environment: The issue is primarily with Slack desktop after upgrading to Ubuntu 20.04, but I've seen it in Chrome as well. As below, all packages latest versions. All other applications seem to be fine.
System Info:
20.04 LTS, added a bunch of software updates this morning per the software updates prompt, should be latest.
System76 Gazelle version gaze14
BIOS INSYDE Corp. version 1.07.09f-1
CPU 4 cores Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
RAM 16GB SODIMM DDR4 Synchronous 2667 MHz
GPU GeForce GTX 1660 Ti Mobile version a1 (also has onboard Intel, disabled)
uname -r = 5.4.0-52-generic
Code:
ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00002191sv00001558sd00008550bc03sc00i00
vendor : NVIDIA Corporation
model : TU116M [GeForce GTX 1660 Ti Mobile]
driver : nvidia-driver-450-server - distro non-free
driver : nvidia-driver-450 - distro non-free recommended
driver : nvidia-driver-418-server - distro non-free
driver : nvidia-driver-435 - distro non-free
driver : nvidia-driver-440-server - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
Initially the "recommended," V 450 was enabled, I then rolled back to 440 which didn't fix the issue.
Slack version Production 4.10.3 64-bit
Chrom(ium) Version 86.0.4240.111 64 bit
I've done due diligence, been on it a week or so not finding any relevant articles out there, anyone got any ideas?
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