Kubuntu 16.04 fresh install freezes after 3-4 min use

[gongalov]

Desktop PC
Kubuntu 16.04 64-bit
Installed from a flash drive alongside Windows 10 64-bit in non-UEFI mode
GRUB Legacy
CPU: Intel I5-3470
VGA: NVIDIA Corporation GK106 [GeForce GTX 650 Ti Boost] (rev a1)
RAM: 8GB
HDD: 1 SSD 256GB for Win10 only
1 HDD 2 TB for personal files and Kubuntu
1 Blue-Ray Rewriter

After installing Kubuntu and entering the system I tried to orient myself, in the interface clicked systray to install updates and after starting updates system freezed (mouse moves but nothing happens when klicking on windows or pressing kbd keys), exited by rebooting. This happened several times, I still cannot check what video driver is installed (don't know what nvidia driver Kubuntu installs by default) and get the system work normally without freezing. Is there any solution to this?

[GreyGeek]

The GUI is nice and sometimes I use it. But, if anything goes wrong it hides the evidence until you look into the logs.
That's why I like to do updates from the Konsole.

sudo apt update
sudo apt full-upgrade

It shows you want it is doing while it is doing it. If something goes wrong you'll see what it was doing (removing something, installing something, etc...l) while it is doing it.

You might have an incomplete installation. Next time you boot up open a Konsole and execute

sudo dpkg --configure -a
sudo apt -f install

and repeat those until they both come back clean.

If they don't find anything or the problems persist then reinstall the Plasma desktop:

sudo apt install --reinstall plasma-desktop plasma-desktop-data kubuntu-settings-desktop

then log out and log back in or reboot.
If that doesn't fix things then we'll have to examine your video driver and its settings.

[oshunluvr]

Nvidia driver: Look at your /var/log/Xorg.0.log file(s) and look for "NVIDIA WAIT"

If you see that message, it's the driver. You can install 340 (last "legacy" driver) or a much newer one via deb http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu xenial main ppa

Last couple of updates and using nvidia-367 have been ok. I'm only getting a lockup every couple of days instead of hours.

[gongalov]

The GUI is nice and sometimes I use it. But, if anything goes wrong it hides the evidence until you look into the logs.
That's why I like to do updates from the Konsole.

sudo apt update
sudo apt full-upgrade

It shows you want it is doing while it is doing it. If something goes wrong you'll see what it was doing (removing something, installing something, etc...l) while it is doing it.

You might have an incomplete installation. Next time you boot up open a Konsole and execute

sudo dpkg --configure -a
sudo apt -f install

and repeat those until they both come back clean.

If they don't find anything or the problems persist then reinstall the Plasma desktop:

sudo apt install --reinstall plasma-desktop plasma-desktop-data kubuntu-settings-desktop

then log out and log back in or reboot.
If that doesn't fix things then we'll have to examine your video driver and its settings.

Thx, I googled and found latest nvidia driver, 344 or something, dont remember, and for now all works

[gongalov]

Nvidia driver: Look at your /var/log/Xorg.0.log file(s) and look for "NVIDIA WAIT"

If you see that message, it's the driver. You can install 340 (last "legacy" driver) or a much newer one via deb http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu xenial main ppa

Last couple of updates and using nvidia-367 have been ok. I'm only getting a lockup every couple of days instead of hours.

Yes, I installed 340