Questions[freeze](ubuntu)

Since I upgraded to Ubuntu 19.10 my system freezes/lags regularly. The mouse, keyboard and screen are completely stuck, after a few seconds it "unfreezes" again. Sometimes it repeats the input I did. For example if I type "F" in a text field it shows "FFFFFFFF" afterwards.

I seems like a lag is triggered every time the system has to read and write a larger amount of data (e.g. start new program, load new firefox tab).

I completely reinstalled Ubuntu 19.10 again on my machine but it is still the same. It runs on a Dell XPS 13.

The same problem is described but not answered in this posts:

Ubuntu 19.10 cursor freezes randomly

Mouse and Keyboard Freeze

Because it was asked in the other posts here are may gnome extensions:

EDIT: Thanks for the comment!

1. I do not use a PS/2 mouse or keyboard.
2. The model: Dell XPS 13 9360 (2016 version). On the label it says: Reg Mode: P54G Reg Type No: P54G002

EDIT2: Turning off all extension does unfortunately not solve the problem.

Edit 3: Here is what it looks like in the system monitor when I reload a website. The

Edit 4: Thank you for your comments! Before I reinstalled Ubuntu 19.10 my swap had 8 GB.

Edit: 6 Increasing the swap to 8GB (I have 8GB of RAM) and setting the swappines to 10 seems to have done something. I will have a further look into it.

Edit: 7 My Bios version is 2.10.0. I'll check of updates.

The Disk utility does not show the SMART data for my ssd.

I am Using Ubuntu in Virtual Box.. the Host OS is Windows10 with dedicated intel's Graphics.

I have reinstalled twice, probably this starts due to sudden shutdown or some reason. Dnt know whats the problem.

Saw a old post about this type on Ubuntu 12.04 / 14.04 LTS ... but their problem/ solution was on Nvidia Driver. And following that didnt help me! . Any solution ?

So my computer has lately started freezing completely when I run some programs that, in the past, would work great.

What I am unsure about however, is what logs that are available to me that could help me track down the issue after a reboot?

Thanks

The problem I think is somewhat similar to this thread.

It doesn't matter if I have swap enabled or disabled, whenever the real used RAM amount starts going close to maximum and there is almost no space left for disk cache, system becomes totally unresponsive.

Disk is spinning wildly, and sometimes after long waits 10-30 minutes it will unfreeze, and sometimes not (or I run out of patience). Sometimes if I act quickly I can manage to slowly open console and kill some of ram eating applications like browser, and the system unfreezes almost instantly.

Because of this problem I almost never see anything in the swap, only sometimes there are some few MB there, and then soon after this problem appears. My not so educated guess would be that it is connected somehow to the disk cache being too greedy, or memory management too lenient, so when the memory is needed it is not freed quickly enough and starves the system.

Problem can be achieved really fast if working with large files (500MB+) which are loaded in disk cache and apparently afterwards system is unable to unload them fast enough.

Any help or Ideas will be greatly appreciated.

For now I have to live in constant fear, when doing something computer can just freeze and I usually have to restart It, if it is really running out of ram I would much more like it to just kill some of userspace applications, like browser (preferably if I could somehow mark which to kill first)

Although the mystery is why doesn't swap save me in this situation.

UPDATE: It didn't hang for some time, but now I got several occurrences again. I am now keeping ram monitor on my screen at all times and when the hang happened it still showed ~30% free (Used by disk cache probably). Additional symptoms: If at the time I am watching video (VLC player) the sound stops first, after a few seconds the image stops. While the sound has stopped I still have some control over PC, but when the image stops I cannot even move the mouse anymore, so I restarted it after some waiting. Btw, this didn't happen when I started to watch the video but some time in (20min) and I didn't actively do anything else at the time, even though browser and oowrite were open on the second screen the whole time. Basically something just decides to happen at one point and hangs the system.

As per request in the comments I ran dmesg right after the hang. I didn't notice anything weird, but didn't know for what to look, so here it is: https://docs.google.com/document/d/1iQih0Ee2DwsGd3VuQZu0bPbg0JGjSOCRZhu0B05CMYs/edit?hl=en_US&authkey=CPzF7bcC

All operating systems freeze sometimes, and Ubuntu is no exception. What should I do to regain control when...

• just one program stops responding?
• nothing at all responds to mouse clicks or key presses?
• the mouse stops moving entirely?
• I have an Intel Bay Trail CPU?

In what order should I try various solutions before deciding to pull the power plug?

What should I do when starting up Ubuntu fails? Is there a diagnostic procedure I can follow?