I run Calibre on Ubuntu 14.04 with the Mate desktop environment.
After the latest update, Calibre is refusing to start and eventually segfaults or I kill it. Prior to the segfault the entire screen flashes several times, like Calibre is trying to create a window over and over and over again, but can't. The flashes are full screen and totally prevent me from doing anything until it either segfaults or I ssh in from my phone and issue a `killall calibre`.
My guess is that something was upgraded on my system that is causing the error, but I don't know what. I generally never restart calibre unless there's an update for it, and it was after the update to 2.21 that I noticed the error.
I launched calibre in a terminal to see what was happening and there are a lot of errors, but I'm not sure which are the real ones and what are red herrings.
On the command-line I first see:
Code:
GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications.
(calibre:29952): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed
(calibre:29952): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed
(calibre:29952): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed
(calibre:29952): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed
Traceback (most recent call last):
File "site-packages/calibre/gui2/ui.py", line 151, in __init__
File "site-packages/calibre/gui2/ui.py", line 165, in init_iaction
File "site-packages/calibre/customize/__init__.py", line 582, in load_actual_plugin
File "importlib/__init__.py", line 37, in import_module
File "site-packages/calibre/customize/zipplugin.py", line 179, in load_module
File "calibre_plugins.apnx_generator.apnxaction", line 14, in <module>
ImportError: No module named PyQt4.Qt
Then there are a ton of:
Code:
(calibre:29952): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed
And also several messages like these:
Code:
QWidget::paintEngine: Should no longer be called
QPainter::begin: Paint device returned engine == 0, type: 1
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::pen: Painter not active
QPainter::setPen: Painter not active
QPainter::drawRects: Painter not active
And even a:
Code:
(calibre:29952): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed
QWidget::setMinimumSize: (MainWindow/Main) The largest allowed size is (16777215,16777215)
I've tried starting with --ignore-plugins but the behavior is the same.
I also tried downgrading to old versions using the instructions on
http://calibre-ebook.com/download_linux but old versions (2.20, 2.19, 2.18) behave the same (which is why I'm thinking it was a system update that caused it).
Any ideas? Thanks in advance.
