Inxi -Fx output is here on pastebin.
Context: when I am writing large files (e.g., tar -xvzf somelargefile, installing a game,
cp largeFile), my desktop starts lagging. I have used Ubuntu 18.04 + KDE for the past 6 months with no trouble. By lagging, I mean (for example) when instantiating a new terminal window, the contents do not render. If I drag a Chrome window, it does not respond. These lags persist for the most part (during any file transfer), although there are sometimes windows of laglessness.
I have followed similar threads such as manjaro kde freezes when copying large files amongst others to no avail. Below is a list of related notes including solutions from other threads.
Other related notes:
- I noticed this lag occurs when my system load reads: Cache Dirty 1 GiB, Writeback at 500MiB. (Rough numbers)
- I have tried changing my IO schedulers to
none(I rebooted each time, grepped the scheduler to double check it has changed) to no avail.
- The swap is never used (0/32GB). I was nowhere near using up too much RAM (swappiness at 60; have 16GB RAM).
- This occurs whether I use the terminal or
dolphinto copy files, or terminal to
tarsome files of size 10GB for example.
- This occurs with kernel versions 4.14.183-1, 4.19.126-1, 5.4.44-1 (All of which are labelled LTS), and the latest 5.7.9-1.
- I turned off the compositor to no avail.
- Changed compositor to OpenGL 3.1, OpenGL 2, XRender to no avail.
- my drive has the root and home partitions fully encrypted.
- this happens from a fresh install (I have yet to confirm whether it lags prior
pacman -Syuafter the fresh install).
- Baloo is disabled.
tlpis completely removed from my computer (its a desktop).
Any ideas what could be going on? Please let me know if there is any additional information I could provide to help this debugging process.