Ubuntu stop working - the mouse cursor does not move

[TheFu]

One usb port is used for the mouse and the other for mobile internet (this is a small modem with a phone card)

sr1 is showing lots and lots of errors. That is usually a DVD or CD device.

[pawellepko]

lsblk shows that sr1 is PLAY ONLINE20 - this is modem.

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0  14,8M  1 loop /snap/gnome-characters/359
loop1    7:1    0  44,2M  1 loop /snap/gtk-common-themes/1353
loop2    7:2    0 140,7M  1 loop /snap/gnome-3-26-1604/98
loop3    7:3    0   4,2M  1 loop /snap/gnome-calculator/544
loop4    7:4    0   156M  1 loop /snap/gnome-3-28-1804/91
loop5    7:5    0  89,1M  1 loop /snap/core/7917
loop6    7:6    0  54,5M  1 loop /snap/core18/1223
loop7    7:7    0  54,5M  1 loop /snap/core18/1265
loop8    7:8    0 156,7M  1 loop /snap/gnome-3-28-1804/110
loop9    7:9    0   4,2M  1 loop /snap/gnome-calculator/536
loop10   7:10   0  42,8M  1 loop /snap/gtk-common-themes/1313
loop11   7:11   0   3,7M  1 loop /snap/gnome-system-monitor/107
loop12   7:12   0   956K  1 loop /snap/gnome-logs/81
loop13   7:13   0  89,1M  1 loop /snap/core/8039
loop14   7:14   0   3,7M  1 loop /snap/gnome-system-monitor/111
loop15   7:15   0  14,8M  1 loop /snap/gnome-characters/367
loop16   7:16   0 140,7M  1 loop /snap/gnome-3-26-1604/97
loop17   7:17   0  1008K  1 loop /snap/gnome-logs/61
sda      8:0    0 465,8G  0 disk 
└─sda1   8:1    0 465,8G  0 part /
sr0     11:0    1  1024M  0 rom  
sr1     11:1    1   128M  0 rom  /media/pawel/PLAY ONLINE20

[pawellepko]

According to the instructions on the blog http://bogdancornianu.com/change-swap-size-in-ubuntu/ I changed the size of the swap space to 8GB - I hope this helps.

I checked the SYSRQ key combination and it doesn't work for me. On the keyboard I have the "Fn" button but the FN + ALT + SYSRQ key combination does not work?

[TheFu]

If you use a swap file, be certain that it isn't included in backups.
SYSRQ isn't the same as
<cntl><alt>-1

Try that.

[pawellepko]

The key combination "<cntl> <alt> -1" works but if the system freezes it doesn't work.

[arcman7]

I've been having the same issue for about a year, still, haven't figured out the problem. Also using Firefox latest version on AMD Ryzen 5 w/Vega 11 graphics. I have 16GB of ram that is rated 3000 but my motherboard AsRock AB350 Pro4 seems to be rated for 2133 speed ram, not sure if that is the problem or something else entirely.

[TheFu]

The key combination "<cntl> <alt> -1" works but if the system freezes it doesn't work.

Ok, that convinces me it is really locked up. Thanks for reporting back.

Anything in the log files? If they are being wiped at boot, might need to change some journalctl settings to get them to stay around between boots. I don't remember the exact setting, but it was really easy to find when I searched for it .... /etc/systemd/journald.conf ... I think it was this setting:

Storage=persistent

The journald.conf manpage explains the directory requirements, which I had to manually create.

BTW, I have a ryzen 5 2600 and don't see this issue with firefox. Not using AMD GPU, however.

[pawellepko]

sudo egrep -i 'warn|error' /var/log/*og:
https://pastebin.com/vwbY7sfJ

sudo egrep -i 'warn|error' /var/log/*og | tee /tmp/err.log
https://pastebin.com/Pdw5yKL9

Maybe this is problem with gnome shell extension - "hide top panel/bar".

[TheFu]

sudo egrep -i 'warn|error' /var/log/*og:
https://pastebin.com/vwbY7sfJ

sudo egrep -i 'warn|error' /var/log/*og | tee /tmp/err.log
https://pastebin.com/Pdw5yKL9

Maybe this is problem with gnome shell extension - "hide top panel/bar".

Have you looked at the logs? What do they tell YOU?
BTW, those are the same command - the 2nd one just stores it into a file for convenience.

[ra7411]

I lose my wired keyboard and wireless logitech mouse response every 2 or 3 days. Both work off a usb 2.0 dock. Usually, changing the dock's usb plug in on the back of my desktop gets it working again. Occasionally, I have to reboot.