Signed up to report the exact same issue. I am experiencing all the issues the poster describes. I should note though, that it is not a symmetrical flicker on the screen and it appears to only affect the left half of the screen, cut down the center of the monitor. Havent noticed anything wrong on the right side. The “duplicated” cursor appears only to the right of the actual cursor.
It seems that the glitching/flickering primary occurs when i do mouse inputs. When the glitch occurs, it doesnt go away unless the mouse is moved or something else updates the area, like popping up the application launcher using the keyboard or “interrupting” the glitch with other inputs.
Notably, i also see horizontal cuts in text in the browser about a pixel thick, that are less frequent but they persist longer, even when scrolling or resizing the page. The cut seems to persist in the same line of text, and stays in place in the line of text when scrolling. Randomly goes away for a bit, but appears again in the same line - unless the page has to be rendered again.
The issue started only today after my first boot since yesterday, where i did multiple updates and package upgrades in the system. I did update kde framework 6.14->6.15,
It seems that the issue is only present at 144 hz and 120 hz refresh rates - but it goes away with 100 and 60 hz refresh rates. EDIT: i do notice minor glitches occasionally in text at 100 hz, but not at 60 hz.
Things and changes that had no impact on the issue: Enabling/disabling HDR, color accuracy, color resolution, brightness, adaptive sync, scale or resolution.
Some specs:
3440x1440, 144hz display.
Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.3-200.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7800X3D 8-Core Processor
Memory: 32 GiB of RAM (30.6 GiB usable)
Graphics Processor 1: AMD Radeon RX 7800 XT
Graphics Processor 2: AMD Radeon Graphics
Manufacturer: ASRock
Product Name: PRIME-B650M-A-II-10DE
‘lshw -C display’:
*-display
description: VGA compatible controller
product: Navi 32 [Radeon RX 7700 XT / 7800 XT]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:03:00.0
version: c8
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=amdgpu latency=0
resources: iomemory:f80-f7f iomemory:fc0-fbf irq:90 memory:f800000000-fbffffffff memory:fc00000000-fc0fffffff ioport:f000(size=256) memory:fcb00000-fcbfffff memory:fcc00000-fcc1ffff
*-display
description: VGA compatible controller
product: Raphael
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:0e:00.0
version: cb
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
configuration: driver=amdgpu latency=0
resources: iomemory:fc0-fbf iomemory:fc0-fbf irq:60 memory:fc20000000-fc2fffffff memory:fc30000000-fc301fffff ioport:d000(size=256) memory:fc700000-fc77ffff
glxinfo | egrep -i ‘device|memory’:
Device: AMD Radeon RX 7800 XT (radeonsi, navi32, LLVM 20.1.6, DRM 3.63, 6.15.3-200.fc42.x86_64) (0x747e)
Video memory: 16384MB
Unified memory: no
Memory info (GL_ATI_meminfo):
VBO free memory - total: 6892 MB, largest block: 6892 MB
VBO free aux. memory - total: 15419 MB, largest block: 15419 MB
Texture free memory - total: 6892 MB, largest block: 6892 MB
Texture free aux. memory - total: 15419 MB, largest block: 15419 MB
Renderbuffer free memory - total: 6892 MB, largest block: 6892 MB
Renderbuffer free aux. memory - total: 15419 MB, largest block: 15419 MB
Memory info (GL_NVX_gpu_memory_info):
Dedicated video memory: 16384 MB
Total available memory: 32030 MB
Currently available dedicated video memory: 6892 MB
GL_AMD_multi_draw_indirect, GL_AMD_pinned_memory,
GL_EXT_framebuffer_sRGB, GL_EXT_memory_object, GL_EXT_memory_object_fd,
GL_NVX_gpu_memory_info, GL_NV_alpha_to_coverage_dither_control,
GL_AMD_pinned_memory, GL_AMD_query_buffer_object,
GL_EXT_gpu_program_parameters, GL_EXT_gpu_shader4, GL_EXT_memory_object,
GL_EXT_memory_object_fd, GL_EXT_multi_draw_arrays,
GL_MESA_window_pos, GL_NVX_gpu_memory_info, GL_NV_ES1_1_compatibility,
GL_EXT_instanced_arrays, GL_EXT_map_buffer_range, GL_EXT_memory_object,
GL_EXT_memory_object_fd, GL_EXT_multi_draw_arrays,