9

I am trying to setup ubuntu properly on ultrawide monitor.
What have I done so far:

  1. I have run: 

    xrandr

    and found out that my connected monitor is HDMI-0:

    HDMI-0 connected 1920x1080+258+0 (normal left inverted right x axis y axis) 797mm x 333mm
1920x1080     60.00*   50.00    59.94  
1680x1050     59.88  
1600x900      60.00
...

  2. Then I have run: 

    gtf 3440 1440 60

    to find my Modeline for the 3440x1440 resolution that I want is and got this: 

      # 3440x1440 @ 60.00 Hz (GTF) hsync: 89.40 kHz; pclk: 419.11 MHz
  Modeline "3440x1440_60.00" 419.11  3440 3688 4064 4688  1440 1441 1444 1490  -HSync +Vsync

  3. Next is to add that new mode: 

    xrandr --newmode MODELINE GOES HERE

    which is in my case: 

    xrandr --newmode "3440x1440_60.00" 419.11  3440 3688 4064 4688  1440 1441 1444 1490  -HSync +Vsync

  4. Then I added the mod with: 

    xrandr --addmode HDMI-0 3440x1440_60

    Now, when I go to displays, I can find that mod on my ultrawide monitor

  5. After that I have run:

    xrandr --output HDMI-0 --mode 3440x1440_60

    and the monitor goes black, and I have to blindly type previous resolution to get it back.

The same happens if I select it from the Displays settings.

I am using Asus Laptop model a54h

Where is my mistake?

cheshire
  • 283

3 Answers3

2

The steps above are correct. My laptop uses an AMD Radeon HD 7470M 1GB and the maximum digital resolution is 2560 x 1600. That is why I get a black screen when I try to set it above it.

cheshire
  • 283
  • 1
    Yesterday I tested 2560x1440 with onboard intel, and it does not require custom modelines to start working. I think you also do not really need them. – N0rbert Feb 01 '20 at 09:30
2

For those of you that have this same issue with an ultra-wide resolution on Ubuntu, do this:

  1. Verify your graphics card can support the resolution by just googling the model # of your graphics card & "max resolution"
  2. Use the proper cable, displayport is the best option, HDMI is the second best option.
  3. Make sure you are using a video cable with no adapters. In other words, if your laptop has display port, dont use a display port to
    HDMI adapter. This was my issue. Once I used a straight display port-to-display port, everything worked flawlessly.
  4. If you have a non-Intel graphics card, then look into downloading the Ubuntu version of those drivers.

Good Luck

techsoysauce
  • 21
0

You created newmode named "3440x1440_60.00"

xrandr --newmode "3440x1440_60.00"

And tried to addmode called HDMI-0 3440x1440_60

xrandr --addmode HDMI-0 3440x1440_60

Names dont match 3440x1440_60!=3440x1440_60.00

However, although the option of 3440x1440 appears in the settings, system still returns to lower after applying it :/

Liuvenas
  • 1