Num lock & scroll lock blinking

[Guest]

After upgrading to Kubuntu 13.04, occasionally Num lock and Scroll lock are blinking and the system is completely frozen: requires a hard reboot.
Also sometimes KDE freezes for a couple of seconds upon start up. After that the system just runs fine.
Hardware: P8P67 + Samsung 830 SSD.
Never had any issues in 12.10.

Any clues?

[Rog131]

Searching: "ubuntu num lock scroll lock blinking"
--> A hit - What does a hard freeze with blinking caps lock and scroll lock leds mean?: https://answers.launchpad.net/ubuntu/+question/5529

...the blinking leds simply indicate a kernel panic...

Searching: "ubuntu 13.04 kernel panic"
--> A hit: Thread: Kernel Panic after upgrade to 13.04: http://ubuntuforums.org/showthread.php?t=2139446

--- An other hit with a workaround: Kernel panic after upgrade to Ubuntu 13.04: http://askubuntu.com/questions/28555...o-ubuntu-13-04

A possible workaround is to use the older kernel -

...Quick fix is to boot with the second line in your grub start screen and select the last installed kernel from 12.10 which works OK on 13.04...

[Guest]

Searching: "ubuntu num lock scroll lock blinking"
--> A hit - What does a hard freeze with blinking caps lock and scroll lock leds mean?: https://answers.launchpad.net/ubuntu/+question/5529


Searching: "ubuntu 13.04 kernel panic"
--> A hit: Thread: Kernel Panic after upgrade to 13.04: http://ubuntuforums.org/showthread.php?t=2139446

--- An other hit with a workaround: Kernel panic after upgrade to Ubuntu 13.04: http://askubuntu.com/questions/28555...o-ubuntu-13-04

A possible workaround is to use the older kernel -

Thanks for the feedback. It might be as well related to the Nvidia driver.
When upgrading to 13.04, I also upgraded the Nvidia to 313.30.