0 Replies Latest reply on Nov 8, 2016 2:02 PM by lastweektonight

    AMDGPU-Pro 16.40 on Xubuntu 16.04 Free-Sync intermittent flicker

    lastweektonight

      The problem:

      Screen flickers intermittently when Free-Sync is enabled on the monitor. The flicker occurs at random intervals. Sometimes it will go 60sec without flickering, sometimes it will flicker once every 10sec, or even once every 2sec. See this video: Intermittent Flicker (AMDGPU-PRO 16.40, RX480, Xubuntu 16.04, Qnix UHD3216R) - YouTube

       

      If I turn off FreeSync on the monitor, the flickering goes away. But I would like to use FreeSync to get better response times out of my monitor. Also if I used the default Xubuntu drivers (with FreeSync turned on on the monitor), the flickering goes away.

       

      I believe the error comes from the fact that xrandr has my monitor at 61Hz, but the display expects 60Hz.

       

      Settings:

      I am using AMDGPU-PRO 16.40 drivers on Xubuntu 16.04.

      My graphics card is a MSI RX 480 4G, my monitor is a QNIX UHD3216R 4k.

      I am connected using Display Port.

      An interesting variable may be that I am using a PCIe 3.0 x8 rather than a PCIe x16, since my motherboard (Intel S2600CP) doesn't have space in its only x16 slot.

       

      Troubleshooting:

      xrandr output:

      Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384

      DisplayPort-0 disconnected (normal left inverted right x axis y axis)

      DisplayPort-1 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 708mm x 399mm

         3840x2160     61.00*+  30.00 

         2560x1440     59.95 

         1920x1200     61.00 

         1920x1080     60.00    50.00    59.94 

         1600x1200     61.00 

         1680x1050     59.95 

         1600x900      60.00 

         1280x1024     75.02    60.02 

         1440x900      61.00 

         1280x800      59.81 

         1280x720      60.00    50.00    59.94 

         1024x768      75.08    60.00 

         800x600       75.00    60.32 

         720x576       50.00 

         720x480       60.00    59.94 

         640x480       72.81    66.67    60.00    59.94 

         720x400       70.08 

      HDMI-A-0 disconnected (normal left inverted right x axis y axis)

      HDMI-A-1 disconnected (normal left inverted right x axis y axis)

      DVI-D-0 disconnected (normal left inverted right x axis y axis)

       

      xrandr -r 60

      Rate 60.00 Hz not available for this size

       

      the GPU part of lshw:

       

      id:
      pci:1

       

      description:PCI bridge
      product:Xeon E5/Core i7 IIO PCI Express Root Port 2a
      vendor:Intel Corporation
      physical id:

      2

      bus info:

      pci@0000:80:02.0

      version:07
      width:32 bits
      clock:33MHz
      capabilities:pci msi pciexpress pm normal_decode bus_master cap_list
      configuration:
      driver=pcieport
      resources:
      irq:34
      ioport:c000(size=4096)
      memory:d8000000-d80fffff
      ioport:e0000000(size=270532608)

       

      id:
      display

       

      description:VGA compatible controller
      product:Advanced Micro Devices, Inc. [AMD/ATI]
      vendor:Advanced Micro Devices, Inc. [AMD/ATI]
      physical id:

      0

      bus info:

      pci@0000:81:00.0

      version:c7
      width:64 bits
      clock:33MHz
      capabilities:pm pciexpress msi vga_controller bus_master cap_list rom
      configuration:
      driver=amdgpu
      latency=0
      resources:
      irq:46
      memory:e0000000-efffffff
      memory:f0000000-f01fffff
      ioport:c000(size=256)
      memory:d8000000-d803ffff
      memory:d8040000-d805ffff

       

      id:
      multimedia

       

      description:Audio device
      product:Advanced Micro Devices, Inc. [AMD/ATI]
      vendor:Advanced Micro Devices, Inc. [AMD/ATI]
      physical id:

      0.1

      bus info:

      pci@0000:81:00.1

      version:00
      width:64 bits
      clock:33MHz
      capabilities:pm pciexpress msi bus_master cap_list
      configuration:
      driver=snd_hda_intel
      latency=0
      resources:
      irq:78
      memory:d8060000-d8063fff