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I can’t get resolution on my monitor either. The screen alternates between pixelated vibrating dots and pitch black. My system is as follows:

Memory : 1.82 TB

Graphics: 2 GB graphics card

RAM; 16 GB Ram

Processor: AMD Ryzen5 9600x 6-core

My set up is as follows, a 19" LG monitor hooked up to the HDMI cable to the graphics card. It worked great when I was installing Ubuntu in safe mode but when I switched to dual boot partition of Ubuntu suddenly the system couldn’t size the monitor. What’s happening?

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@lml98905 Welcome to Ubuntu Discourse :slight_smile:

I moved your post to its own thread.

Same and similar are often confusing and it is better to have your own topic where we can give you better advice.

Thanks.

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If using sddm try this -

‘’'Edit or create the script /usr/share/sddm/scripts/Xsetup and add the line

xrandr --output HDMI-1 --mode 1920x1080 --rate 59.94’‘’

You will need to set the correct resolution for your LG monitor

You haven’t given us enough info on your system, what flavour ubuntu, display manager etc.
Tony

2 Likes
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Didn’t work at that. Also it cuts it off at the top and bottom and the right slider bar when I’m in Windows.

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It didn’t work at that. Besides that, it cuts off the top and bottom and right slider bar when I’m in windows.

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It cannot affect your windows installation, impossible. You did not give any system details…

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It did when I changed the monitor resolution to 1920x1080. What system details did you need? I couldn’t print out the system information list.

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For a start show us the full output of terminal command
inxi -Fzx
This will show us a lot more about your software and hardware.

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How would I get into terminal command in the first place? All I get on my monitor is vibrating pixels alternating with pitch black screens.

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Sys info
Sys info1920×2560 575 KB

Sys info2
Sys info21920×2560 568 KB

How about this? Will this do?

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You are having issues with Linux, why show us Windows screenshots? It doesn’t make sense.

Just tell us the Linux flavour you are trying to install and it’s version. That’s all we have been asking you since your first post.

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Your Windows screenshots did not give any info about this device?

Secondly, remove/disable the graphics card and test your display (in a “Try Ubuntu” live session) using the the built-in Linux kernel drivers for AMD processors.

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I can only send you windows screenshots because I couldn’t bring up anything on ubuntu. Anyway, the scene has all changed. I actually loaded the newest version of Ubuntu 24. xx but the only way I can get it is by Ubuntu advanced functions, Ubuntu with linux recovery mode. The screen resolution is set at 1024x 900 and I can’t change it.

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How do I disable the Graphics card?

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Depends on your PC…
Possibly via UEFI settings
Perhaps physically remove it

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If you are choosing recovery mode that has the “nomodeset” parameter and the resolution of 1024x900/768 is all you can expect to get.

You will need to load the usb stick in normal mode to get higher resolutions.

I would advise to download different flavours of Ubuntu to see if one of them will work with your system. Try Lubuntu, Kubuntu and as a last resort Linux Mint. You obviously are having difficulties with standard Ubuntu.

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Hello everyone,

I’m seeking assistance with a display scaling issue on my Lubuntu 24.04.2 installation.

My setup:

Laptop: DELL Latitude 7285

  • Processor: Intel® Core™ i7 i7-7Y75

  • Type: Hybrid (2-in-1)

  • Screen Size: 31.2 cm (12.3") Touchscreen

  • RAM: 16 GB LPDDR3-SDRAM

  • Storage: 512 GB SSD

  • Wireless: Wi-Fi 5 (802.11ac)

  • External Monitor: Lenovo L28u-30 (4K resolution capable)

  • Operating System: Lubuntu 24.04.2

The Problem:

I’m experiencing difficulty achieving proper scaling when using my Lenovo L28u-30 4K monitor in a dual-monitor setup with my Dell Latitude 7285.

Currently, the maximum resolution I can get on the Lenovo L28u-30 is 2K (2560x1440), which seems to be mirroring the resolution of my Dell Latitude 7285’s internal display. Even if I turn off the laptop’s screen, the external monitor remains capped at 2K.

When I attempt to set the external monitor to its native 4K resolution (3840x2160), everything on the screen becomes too small to be usable. I need a solution for proper display scaling to make the 4K resolution viable.

I recall seeing a similar discussion on the old Lubuntu discourse (https://discourse.lubuntu.me/t/help-scaling-the-desktop-on-lubuntu/4810?page=2), but I’m unable to access that specific thread.

Any guidance or suggestions on how to effectively scale the desktop on Lubuntu 24.04.2 for a 4K external monitor would be greatly appreciated.

Thank you in advance for your help!

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