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Hi I using amd ryzen 3 2200 i using ubuntu 18.04 And I want use 2 monitor but only one monitor shown what should I do

EDIT

here my lspci | grep VGA

38:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Vega [Radeon Vega 8 Mobile] (rev c8)

and here my Thanks xrandr

xrandr: Failed to get size of gamma for output default Screen 0: minimum 1280 x 720, current 1280 x 720, maximum 1280 x 720 default connected primary 1280x720+0+0 0mm x 0mm 1280x720 76.00*

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    Which Ubuntu version are you using? What gives you: lspci | grep VGA
    – koni_raid
    Jan 31, 2019 at 8:52
  • Welcome to AskUbuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.
    – Daniele Santi
    Jan 31, 2019 at 13:42
  • sorry for that i did edit my qustion
    – huntz rahmadi
    Jan 31, 2019 at 23:32

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