AnsweredAssumed Answered

R9 390X displayport flickering on 4k screen win10

Question asked by mike79 on Apr 8, 2017

in the last 4 updates on Grimson relive/vulkan, i have encountered some annoying behavior when , using display port and using 4k screen.
all the time when using browser or software, it somehow restart connection to display port.
I reinstalled several times but no luck.

Now i narrowed it down to that it somehow connected to the scaling option in win10 where you can scale desktop upto 350 %

when using no scale 100% there is no flicker or restart of the connection, but on every other scale options there is when hell begins.
here you see how it restarts or looses the connection
visual studio 2015 displayport bug - YouTube


starts at 0:30
it does that with all programs and browsers.


little update
it only does it also after some test with display port 1,2
it do not do it with display port 1,1, but you cant get full UHD 4k with driver 1,1












Monitor Samsung 4k

  Name U28E570 on AMD Radeon R9 390 Series

  Current Resolution 1920x1080 pixels

  Work Resolution 1920x1040 pixels

  State Enabled, Primary, Unsafe

  Monitor Width 3840

  Monitor Height 2160

  Monitor BPP 32 bits per pixel

  Monitor Frequency 60 Hz

  Device \\.\DISPLAY1\Monitor0



Graphics Chipset

XFX gpu card R9 390 x

ATI AMD Radeon (TM) R9 390 Series

  Manufacturer ATI

  Model AMD Radeon R9 390 Series

  Device ID 1002-67B0

  Revision 81

  Subvendor XFX Pine Group (1682)

  Current Performance Level Level 0

  Current GPU Clock 300 MHz

  Current Memory Clock 150 MHz

  Current Shader Clock 150 MHz

  Technology 28 nm

  GPU Clock 1050,0 MHz

  Temperature 38 °C

  Bios Core Clock 300,00

  Bios Mem Clock 150,00

  Driver version 21.19.525.258

  BIOS Version 113-GRENADA_XT_C671_D5_8GB_HY_W83

  Memory Type GDDR5

  Memory 8192 MB

  Bandwidth 384,0 GB/s



Can the devs look into this matter, and is there any temporary fix.


Meldingen ble redigert av: mike h added Update on display driver.