Screen Tearing on widescreen monitor

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Just try disable radeon driver and take up the amdgpu:

You can do a temporary test setting these boot parameters in the kernel:

You do temporay changes in the boot kernels parameter read it

radeon.cik_support=0 radeon.si_support=0 amdgpu.cik_support=1 amdgpu.si_support=1

Note with it you will disable the radeon driver for your card in the boot process

After if it didn’t work disable compositor v-sync in KDE compositor by selecting (never)

If this did work, do the changes permanent to the next reboots:

A) with grubby

B) with grub2-mkconfig

  • you will need first edit your file etc/default/grub.conf and add the parameter

  • After you will regenerate the grub with

if UEFI system: sudo grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg
if BIOS system: sudo grub2-mkconfig -o /boot/grub2/grub.cfg

You know more about if you use BIOS or UEFI just check it with lsbk if you see a efi partition you are in UEFI if you see BIOS you are bios also you can check through it

Some referens about your issue.

https://wiki.archlinux.org/index.php/AMDGPU#R9_390_series_poor_performance_and/or_instability

  • amdgpu parm (here you will find all parameters that the driver amdgpu can take):

https://dri.freedesktop.org/docs/drm/gpu/amdgpu.html

the method that did indicate @vits95 also should work but the command in the boot parameter in fedora should be if i am not wrong rd.driver.blacklist=<module> and you would generate a blacklist.conf file and regenerate your initramfs (initrd) Referens below:

Regards.

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