After installing Zorin OS, lines appear on the display.

Hello, I installed Zorin OS yesterday, but when the installation completion screen appears at the end, if the display does not move, lines appear on the display. And when I move the mouse or the display moves, the lines disappear. Is there a way to make this display have no lines? The laptop is Samsung NT900X3E-K74S.

Can you please tap ctl+alt+t to open terminal and run

sudo lshw -C video

Post the output here.

I'm afraid Samsung Notebooks are not very good when it comes to GNU/Linux, based on other posts on here. My own personal take on this would be to trade up to a Dell. Alternatively a second hand Dell off ebay.

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taeyoungryu@taeyoungryu-900X3C-900X3D-900X3E-900X4C-900X4D:~$ sudo lshw -C video
[sudo] taeyoungryu 암호:
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
logical name: /dev/fb0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom fb
configuration: depth=32 driver=i915 latency=0 resolution=1920,1080
resources: irq:31 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:3000(size=64) memory:c0000-dffff

Welcome to the Forum!

Coild You post a Picture of these Lines?

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I've seen this before, I believe this is an issue with lack of V-Sync enabled, and your system refresh rate, doesn't match your monitor refresh rate, and or, a lack of video drivers installed, and or, a problem with your monitor cable.

When you installed Zorin OS, did you choose to install the proprietary drivers? If the answer is no to that, please navigate to "software and updates" and click on "additional drivers" tab.

If you see your GPU in there, make sure to selected it in the list, and apply the changes. It will take time for it to install, so be patient. If you have an Nvidia GPU, please hit the SUPER key, and type Nvidia. Then click on Nvidia X Server Settings.

Depending on which method your monitor supports for V-Sync, you might have G-Sync or Free-Sync support, and you can try enabling it, to see how your display acts then. Also, its highly important, that the refresh rate set in the APP, supports the monitor. I find more often then not, Linux does not properly set the refresh rate, so you have to manually set it yourself.


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@StarTreker it's a notebook using an Intel i915 chipset.

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Okay. So far Your Display is not broken, I would suggest to switch to Xorg to check if it disappears or not. To do that go to the Login Screen (not the Lock Screen). Simply reboot Your Machine. On the Login Screen click on Your Profile so that the Password Field appears. It has to be appeared. When it is appeared, You should see in the bottom right Corner a Gear Icon. Click on it and choose the Option ''Zorin Desktop on Xorg'' and then log in and check if it works.

Shouldn't that bring success: What Resolution do You have set up? What Refresh Rate? Is Fractional Scaling active?

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Given the Intel chipset and the i915 kernel included driver, you likely will need to apply a kernel parameter.

I am not sure what parameter you need right off, you can safely try different ones until you get success. You might try
i915.enable_guc=0 or i915.enable_psr=0

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I tried changing them all once, but it didn't work.