Sami LehtinenAfter returning from a week-long vacation, I installed all pending updates for Ubuntu 24.04 LTS and updated the motherboard BIOS/UEFI. Since then, the system has been running exceptionally smoothly, with zero GUI pipeline latency, even when concurrently playing two UHD videos. Previously, there was a noticeable lag of approximately 50 ms, which has now completely disappeared. I am uncertain about the exact cause of this improvement. While updates to Firefox or Nvidia drivers are potential factors, a BIOS update is generally unlikely to resolve UI rendering latency directly, making the root cause difficult to pinpoint.
To illustrate the improvement, I am currently running a local UHD x265 video in VLC simultaneously with a UHD av01 stream from YouTube with zero latency. This dramatic performance boost is highly unexpected.
Previously, the GUI latency was severe enough that I was seriously considering replacing the display adapter. I had assumed the root cause was the GPU exhausting its memory and falling back to system RAM. It is plausible that recent software updates introduced optimizations in memory management or enhanced memory compression, which could explain this sudden and significant performance gain.