Screen Flicker problem with RX 560 GPU in ubuntu 18.04

[toaki]

I am using amd ryzen R7 1700 cpu and RX 560 GPU... After Installing Ubuntu 18.04 my monitor screen is always flickering. I have a HDMI connection with my gpu any solution for my problem?

System: Host: astrex Kernel: 4.15.0-34-generic x86_64 bits: 64
Console: tty 0 Distro: Ubuntu 18.04.1 LTS
Machine: Device: desktop System: Gigabyte product: AB350-Gaming 3 serial: N/A
Mobo: Gigabyte model: AB350-Gaming 3-CF v: x.x serial: N/A
UEFI [Legacy]: American Megatrends v: F23 date: 08/08/2018
CPU: 8 core AMD Ryzen 7 1700 Eight-Core (-MT-MCP-)
speed/max: 1369/3400 MHz
Graphics: Card: Advanced Micro Devices [AMD/ATI] Baffin [Polaris11]
Display Server: X.Org 1.19.6
drivers: ati,vesa (unloaded: modesetting,fbdev,radeon)
Resolution: 1920x1080@74.97hz
OpenGL: renderer: Radeon RX 560 Series
version: 4.6.13536 18.30.2.15
Network: Card: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
driver: r8169
Drives: HDD Total Size: 3250.7GB (38.3% used)
Info: Processes: 373 Uptime: 42 min Memory: 2721.6/16053.7MB
Client: Shell (sudo) inxi: 2.3.56

[dbergst]

I believe the correct driver for amd baffin polaris 11 is amdgpu. The ati driver is for older hardware.

[toaki]

The flickering is stop for now...
I don't know how but my best guessing is that I turned of the VSYNC in my monitor and reduced its refresh rate 75Hz to 60 Hz this do the trick.

[wildmanne39]

Please use the default font color and properties unless you need to highlight or draw attention to a part of your post.