Hi, I installed fedora kde plasma 2 days ago and the 1st day everything was smooth, but now suddenly my screen is flickering on 200 hz the only fix is to use 120 hz but even everytime i reboot and im in the lock screen the flickering just gets violent. I tried plenty fixes with none working and i also had the same issue on mint but not on windows which is odd. I would greatly appreciate if someone could help.
thank you
Post output of inxi -Fzxx so we can see what youâre using (as you donât mention your graphics subsystem), the drivers in use, the kernel and so on.
Without this fundamental, basic information itâs difficult to offer suggestions on correcting whatever the issue is.
I should have mentioned - post it as preformatrted text using the </> button - as you can see, it looks a mess and is much more difficult to read with all of the formatting removed.
System:
Kernel: 6.18.13-200.fc43.x86_64 arch: x86_64 bits: 64 compiler: gcc
v: 15.2.1
Desktop: KDE Plasma v: 6.6.1 tk: Qt v: N/A wm: kwin_wayland dm: SDDM
Distro: Fedora Linux 43 (KDE Plasma Desktop Edition)
Machine:
Type: Desktop Mobo: Micro-Star model: PRO B550M-VC WIFI (MS-7C95) v: 3.0
serial: <superuser required> Firmware: UEFI vendor: American Megatrends LLC.
v: H.50 date: 07/29/2022
CPU:
Info: 6-core model: AMD Ryzen 5 5600 bits: 64 type: MT MCP arch: Zen 3+
rev: 2 cache: L1: 384 KiB L2: 3 MiB L3: 32 MiB
Speed (MHz): avg: 1750 min/max: 566/4471 boost: enabled cores: 1: 1750
2: 1750 3: 1750 4: 1750 5: 1750 6: 1750 7: 1750 8: 1750 9: 1750 10: 1750
11: 1750 12: 1750 bogomips: 84006
Flags-basic: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a
ssse3 svm
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Navi 22 [Radeon RX 6700/6700
XT/6750 XT / 6800M/6850M XT] vendor: ASUSTeK driver: amdgpu v: kernel
arch: RDNA-2 pcie: speed: 16 GT/s lanes: 16 ports: active: HDMI-A-1
empty: DP-1, DP-2, DP-3, Writeback-1 bus-ID: 2d:00.0 chip-ID: 1002:73df
Display: wayland server: Xwayland v: 24.1.9 compositor: kwin_wayland
driver: gpu: amdgpu display-ID: 0
Monitor-1: HDMI-A-1 model: Acer QG240Y X1 res: 1920x1080 hz: 120 dpi: 92
diag: 604mm (23.8")
API: EGL v: 1.5 platforms: device: 0 drv: radeonsi device: 1 drv: swrast
gbm: drv: kms_swrast surfaceless: drv: radeonsi wayland: drv: radeonsi x11:
drv: radeonsi
API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 25.3.5 glx-v: 1.4
direct-render: yes renderer: AMD Radeon RX 6750 XT (radeonsi navi22 LLVM
21.1.8 DRM 3.64 6.18.13-200.fc43.x86_64) device-ID: 1002:73df
display-ID: :1.0
API: Vulkan v: 1.4.341 surfaces: N/A device: 0 type: discrete-gpu
driver: mesa radv device-ID: 1002:73df device: 1 type: cpu
driver: mesa llvmpipe device-ID: 10005:0000
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor wl: wayland-info x11: xdriinfo,
xdpyinfo, xprop, xrandr
Drives:
Local Storage: total: 1.82 TiB used: 38.73 GiB (2.1%)
ID-1: /dev/nvme0n1 vendor: Kingston model: SNV2S2000G size: 1.82 TiB
speed: 63.2 Gb/s lanes: 4 serial: <filter> temp: 31.9 C
Partition:
ID-1: / size: 114.79 GiB used: 15.44 GiB (13.5%) fs: ext4
dev: /dev/nvme0n1p5
ID-2: /boot/efi size: 96 MiB used: 55.4 MiB (57.7%) fs: vfat
dev: /dev/nvme0n1p1
ID-3: /home size: 168.65 GiB used: 23.24 GiB (13.8%) fs: ext4
dev: /dev/nvme0n1p6
Swap:
ID-1: swap-1 type: zram size: 8 GiB used: 0 KiB (0.0%) priority: 100
dev: /dev/zram0
Sensors:
System Temperatures: cpu: 36.1 C mobo: 30.0 C gpu: amdgpu temp: 36.0 C
mem: 32.0 C
Fan Speeds (rpm): N/A gpu: amdgpu fan: 0
Info:
Memory: total: 32 GiB available: 31.26 GiB used: 4.93 GiB (15.8%)
Processes: 740 Power: uptime: 1h 17m wakeups: 1 Init: systemd v: 258
default: graphical
Packages: pm: rpm pkgs: N/A note: see --rpm pm: flatpak pkgs: 8
Compilers: N/A Shell: Bash v: 5.3.0 running-in: konsole inxi: 3.3.40
You donât appear to be running 4K resolutions, but there are known issues with HDM 2.1+. It doesnât sound like these limitations should impact you but the issue does make me wonder:
Maybe the combination of 200 Hz is what pushes you into the âI have HDMI FRL/VRR issuesâ?
And I think the other clue you provided that makes me think you have this HDMI 2.1 issue is that you said it works fine in Windows.
Can you switch to DisplayPort?
Whatâs got me annoyed by this is that it WAS working fine at 200, for a bit, and then it wasnât.
If it were a cable, or a in-line dock, or a significant length of time being ok and then not ok, I could understand it. My gut feel is software, but itâs AMD and I know diddly about AMD kit.
@auaaa - do you know when this was working ok and when (date) it started playing up - maybe we can look at the dnf history to see what changed between âwell it was OK on Tuesday and giving me an epileptic fit on Fridayâ. Can you narrow it down to when it was ok and when it freaked out?
Also, thanks for the preformatted inxi - itâs much nicer! 
I actually do have a DisplayPort option on my monitor, so Iâve ordered a cable. Iâll update you tomorrow to let you know if that fixes the issue. Thank you for the help!
I checked my dnf history and heres the most important i guess:
dnf upgrade --refresh (ID 8).but I will first try the dp option and if it doesnât work ill try to move on to another solution. thanks
I wonder if its worth trying the previous Kernel. If your install is a bit older then you should see the Grub menu for a short period during the start of the boot process. When you see the Grub menu, hit the arrow down button straight away. This will stop the 5 second timer and gives you a chance to choose the previous Kernel. Try the Kernel 6.18.12. and see if that stops the flickering.
Update: I just switched to DisplayPort and the issue is completely fixed! Not only is the 200Hz stable now, but the image quality looks even better. Thanks for the help !