I had already gone ahead with @darryl - clutched at straws!
My calibre dump and db was on an internal ext3 sata drive. Unplugged it.
Uninstalled calibre which is on my bootable SSD.
Moved .config/calibre to another location.
Rebooted and reinstalled calibre, this time with library on bootable SSD.
Started calibre both w & w/o native filedialog.
Added a book through file dialog. Hung again.
Imp: Even if I cancel w/o adding a book & shut file dialog, calibre hangs. So I also try adding a book cover through "browse'. Same - cancel filedialog & calibre hangs. (@Kovid, you wanted to know this).
Added books through command line, works fine.
Tried all the above in Gnome. Same results.
Didn't try icewm but I guess that should be no different since Gnome eliminates KDE Plasma as the culprit.
Only debug message in all the above attempts:
Quote:
|
Unable to open ~/.mtpz-data for reading, MTPZ disabled.
|
Also tried on Win8.1, I have a dual boot. Fresh calibre install - all fine with adding books, filedialogs
et al.
Before this issue occurred I was enabling regular Kubuntu software upgrade notifications on 14.10.
I migrated to 15.04 after this issue started. I also migrated from Kernal 3.17 to 4. And I had moved to Calibre 2.29 before the issue started.
No other system changes I can recall.
Looks like something fishy with Ubuntu/file dialogs???