When logout screen turns old tv effect

General Help
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Happens also on wakeup, Any suggestion?

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Do you have an AMD card in your laptop?

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I had the same issue.

I think a kernel upgrade/downgrade is what you need, unless there are better solutions.
Also please tell us what sudo lshw -c video in the terminal gives.

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sudo lshw -c

 *-display                 
       description: VGA compatible controller
       product: Renoir
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:03:00.0
       version: c4
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
       configuration: driver=amdgpu latency=0
       resources: irq:44 memory:b0000000-bfffffff memory:c0000000-c01fffff ioport:1000(size=256) memory:c0600000-c067ffff

Thanks guys for quick response. It was appear after a big update, probably installed new kernel. Which kernel i should prefer?

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Try rolling back to 5.11.0-43

Tap left shift or esc or tab (whichever works) to pull up Advanced Options for Zorin
Then arrow key to the 5.11 kernel to select it.

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Doesnt work any of them. I tried install 5.13 just before read your post and still same. Listing 5.12 and 5.13 in Advanced options (in the boot sections). i clicked on 5.12 but still same. i suppose install 5.11 manualy but i'm newbie which 5.11 file i should install? There is a lot of 5.11 files.

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Zorin OS 16 already uses kernel 5.13. And I suspected that to be the problem since that was a recent update. There was no reason to install it again. You should try booting into kernel 5.11. Isn't it listed in the Advanced Options in GRUB?

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I screwed up i guess. Not listing in the advanced options. Here SS;

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Install Linux Kernel 5.11 with:

sudo apt install linux-headers-5.11.0-27-generic linux-modules-5.11.0-27-generic linux-modules-extra-5.11.0-27-generic linux-image-5.11.0-27-generic

@Aravisian 5.11.0-27 right? I don't remember clearly.

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sudo apt install linux-headers-5.11.0-43-generic linux-modules-5.11.0-43-generic linux-modules-extra-5.11.0-43-generic linux-image-5.11.0-43-generic

We were posting at the same time, it seems.
That one should work, too.

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Thanks guys, it fixed with 5.11.0-43 but 5.13 still default boot kernel. When I manually boot with 5.11 works fine, so I need set as default 5.11 or remove 5.13. I tried boot with 5.11 and auto purge command but doesn't work. Any suggestion?

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Yep, got you covered:

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