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I have a Huwaei MateBook X Pro with 8 gigs of ram running 18.04. It sometimes gets super laggy, to the point where I move the mouse, have to wait a second and then the mouse moves. I am suspicious that it's Chrome, but I can't tell for sure. I have a 2 gig swap space set up. I think this is somehow related to mem but not sure. How can I diagnose this and anything you can recommend trying?

Thanks for any help, Kevin

update - adding output of extensions

ls -al ~/.local/share/gnome-shell/extensions
ls: cannot access '/home/kevin/.local/share/gnome-shell/extensions': No such file or directory
user1130176
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  • Diagnose by opening a terminal during a super-laggy time, and looking at the output of the top and free commands. If you need help understanding the output, then add the complete output to your question. – user535733 Mar 24 '19 at 13:07
  • problem is, i cannot access the terminal until after the lag has passed. – user1130176 Mar 24 '19 at 13:11
  • You're smart - you will figure out a way. Here's one: Leave top open and visible waiting for a lag so you can watch your resource consumption. – user535733 Mar 24 '19 at 13:36
  • Edit your question and show me ls -al ~/.local/share/gnome-shell/extensions. – heynnema Mar 24 '19 at 13:49

1 Answers1

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I've got this problem the other day, too.

  1. Kali installed -> every 2 to 7 minutes a roundabout 10-30 seconds lag
  2. Elive from USB (Persistent) -> everything fine
  3. Elive installed on HDD -> lag
  4. Ubuntu installed -> lag
  5. Ubuntu Live -> everything fine.

There is no clue in top, dmesg, tail -f /var/log/messages, syslog, smartctl --health /dev/sda (SMART), Seatools (Samsung Disk Check tool), ... Even the HW clock is not affected from the lag.

Next I moved the hard disk to another Laptop -> same lag issue Last I connected it via SATA-USB cable and performed some read/write tests -> same lag issue in dd, without affecting the OS.

Result: Nor the disk is broken (I/O Errors), nor the arm (parking position click). It seems there is an other chip (cache?) issue.

I recommend: If all commands/tools mentioned above are not helping, try a live-system, than try switch the disk.

LupusE
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