Trusty Tahr installation is locking up every day after latest ujpgrades.

[TommyB]

There is no particular program or process that I can determine is running when it locks up.
In fact, I can have the desktop running and leave it to run the screen saver and it will lock sometime
later. When I say lock up I mean "brain dead", not locked up as in screen lock after timeout.
Mouse will work, but nothing else. Not ALT-F2, nothing. I have to soft reset using the computer's
red button. Sometimes it will occur more than once a day. Did MS have anything to do with it?
I have computer and software info on my profile.
Thank you!

[GreyGeek]

In addition to what Teunis said, if his suggestion doesn't work, you can reinstall the kubuntu desktop

sudo apt-get --reinstall install kubuntu-desktop

[TommyB]

Thanks for your suggestions!
I have given both a shot to see what happens and will let you know if the problem persists.

[TommyB]

The problem is not fixed and seems more random than ever. I do know that usually I have both Thunderbird and Firefox running at the same time quite often when it hangs up, but not always. This morning for example, I found the screensaver locked up and it was the only program running. I ended doing a red button reset.
I really would like to know what is causing this consistent lockup.
Thank you!

[tafi]

Do you have Nouveau , or Nvidia propietary drivers? If card is Nvidia.
Have you tried memtest?
Is your free memory amount dimishing before lock up?
Is computer or display card warming up before lockup?

[tafi]

Cmon Tommy, be here