I tried the 4.7.4 upgrade a couple of days ago on my laptop (hybrid M11 + 4.6.5 + Wheezy system) and everything upgraded without issue. Upon reboot I found that plasma-desktop would crash every time I closed an application window and switched to a different desktop.
Since it was a hybrid system, I decided to do a fresh install of M11 and then followed timkb4cq's instructions to upgrade to 4.7.4. I figured this would rule out any issues with the Wheezy components I had in the last setup.
The steps I followed:
- Installed M11.
- Installed all official Mepis and Squeeze updates.
- Rebooted and installed all CR (main) updates (so I could keep amarok).
- Rebooted and enabled the two repos timkb4cq instructed to do. Then I dropped to console and applied the update via "aptitude -t mepis dist-upgarde
Same issue. Plasma-desktop crashes when I close an application and then switch to a different desktop. So, it's a re-install and back to 4.6.5 for me. It does appear to be a KDE bug, there are multiple reports on the bug tracking site about this issue, but here is the most relevant :http://bugs.kde.org/show_bug.cgi?id=286353
I also found this about the issue:
Added by Aaron J. Seigo 2 months ago
workaround qt ref counting bug seen triggered often in libtaskmanager not patching libplasma as i'd like to keep this mess limited to taskmanager related code rather than burdoning all DataEngines with it. this requires today's KDE/4.7 libplasma to work as expected: sourceRemoved was not being emitted for direct-deleted containers.
Thus, I will wait until 4.7.4 matures a bit more (i.e. receives the debian polish and bug squashing it needs) or KDE 4.8.x. Regardless, thank you Stevo and timkb4cq for all your hard work.