When using driver 545.29.02 (and also the previous beta—I haven’t tested any others in the 545 series), my desktop framerate alternates between 120 and 60 FPS. Video here. This issue does not happen with the 525 or 535 drivers.
Here are the details of my configuration:
OS: KDE Neon 5.27 User Edition (Plasma Desktop 5.27.9, KDE Frameworks 5.111.0, Qt 5.15.11)
I have exactly the same problem. I updated to 545 and everything is just sluggish and unusable. My monitor refresh rate is 75 and it drops to 38fps (~37.5). A rollback to 535 fixed this problem.
I’m experiencing the same issue under both the 545 beta and the 545 stable drivers. The desktop runs at roughly 35fps with everything sluggish and essentially unusable.
OS: KDE Neon User Edition
KDE Plasma version: 5.27.9
KDE Frameworks version: 5.111.0
Qt version: 5.15.11
Kernel version: 6.2.0-36-generic (64 bit)
Graphics Platform: X11
Processors: 12 x Intel Core i7-8700k
Memory: 32GB
Graphics Processor: Nvidia GeForce RTX 2070 Super
Rolled back to the 535.129.03 drivers again and my desktop renders perfectly once more.
Experiencing the exact same thing since 545.29.02. Virtually anything that is displayed has this, not just moving windows, it’s also scrolling in a webpage, all desktop animations, gaming (only when kwin is not disabled).
This needs to be addressed ASAP, it’s a high priority bug because it affects everything.
Thanks for highlighting issue to us, I have filed a bug [4365907] internally for tracking purpose.
Shall ret to replicate issue on similar setup and will get back if required any additional information.
Looks like I do see similar behavior on below configuration setup -
HP OMEN by HP 25L Gaming Desktop GT15-0xxx + AMD Ryzen 7 5700G with Radeon Graphics + Ubuntu 22.04.1 LTS + kernel 5.19.0-46-generic + Driver 545.29.02 + NVIDIA GeForce RTX 3080 + Asustek Computer Inc VG279QM + Resolution 1920 x 1080 + Refresh rate 120 Hz
With driver 535.43.11, I can see continuously fps value as 100 and it drops to level around 60 for only couple of seconds.
With driver 545.29.02, I can see fps value as 60 most of the time, however after moving window manager, it reaches to level 100 but again come back to 60 after a while. It fluctuates between 60 and 100 for my setup.
Please let me know if it does qualify as repro so that we can debug this issue in a right direction.
This works, but causes screen tearing. You can solve the screen tearing by removing the line KWIN_X11_NO_SYNC_TO_VBLANK=1, but it creates some output delay
I haven’t tested every scenario but disabling KWin fixed the issue for me. At least the most obvious things like slow desktop animations, lagging window dragging and stuff like that. So it appears to be linked to KWin in particular.
Bear in mind the issue also happens on a 60Hz monitor, not just displays with high refresh rates. Essentially, most of the time the desktop is rendered at ~35fps under KDE, with occasional spikes to ~60fps running the 545 drivers.
Rolling back to the 535 drivers completely eliminates the problem, with the desktop rendered at a steady 60fps.
