Comment 20 for bug 1448102

I'm having the same problems after a FRESH install of kubuntu 15.04. Some system specs here:

AMD FX(tm)-8120 Eight-Core Processor
VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]
16g ram
KVM host running 5 virtual machines. All appear to function as expected during the desktop crash

The system worked fine in kubuntu 14.10. I first noticed if I stop using the system for even a short period of time (less then 5 min), it stops responding. Originally I thought it was related to the screen blanker so I disabled it. The mouse pointer moves, and I can ctrl-alt-f1 to login at the console to restart the desktop like this:

service sddm restart

Hope that's useful for others stuck in this situation. I also find it crashes, but usually reloads without issues if I'm playing with the widget system. I've tried to send bug reports via the Crash Reporting Assistant, but it complains its missing debug information. I tried to install what was needed using the interface but it complains it can't find them. Here are the files it complains are missing debug files:

/usr/bin/plasmashell
/usr/lib/x86_64-linux-gnu/libQt5Qml.so.5

I've tried to manually locate and install debug files for them, but couldn't find anything via apt-cache. Anyone know what package I'm looking for?