Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

Submitted by Arek Tumas

Assigned to Default DRI bug account

Link to original bug (#108020)

Description

I'm experiencing some interlacing on the right side of the screen of my 1440p 144hz monitor when using 4.18+ kernels and setting the monitor to 120+ hz It works fine with 100hz and lower, or older kernels, which seems to indicate some displayport bandwidth issue/regression. This happens regardless of the distro or mesa version. I'm using an RX Vega 64 with the opensource driver.