Calibre crashes when enabling/disabling external monitors

[Andrew Myers]

Calibre crashes when using external monitors. To reproduce plug in an external monitor (HDMI in my case) on a laptop. With Calibre running, open the display settings, enable the external, disable the built-in display, and press apply. On my system Calibre crashes every single time I do this.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: calibre 2.5.0+dfsg-1
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Dec 29 09:57:53 2014
InstallationDate: Installed on 2014-11-20 (39 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
SourcePackage: calibre
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[ser0ser (ser-man)]

On my Ubuntu 15.04/Plasma 5/Dual Monitor starting Calibre eats about 2 gigabytes of memory and makes X server to allocate another 2GB, then whole X session crashes. It is extremely annoying because of loss of unsaved data from all opened applications. This doesn't happen when second monitor is turned off.

[ser0ser (ser-man)]

addition to previous comment: I'm using Calibre 2.30

[ser0ser (ser-man)]

With this bug Calibre is useless for me. I'm constantly using 2 monitors and I don't want do rearrange whole desktop and turn off second monitor just to start Calibre.

Maybe this bug is related to splash screen? Is it possible to disable it?

(Calibre version: 2.34)

[ser0ser (ser-man)]

OK. Maybe it is not related to two monitors. I've done following test:

rm -fr /opt/calibre
rm -fr ~/.config/calibre

make fresh install using script from web page

start nested X server with some window manager inside

start calibre

and this is what I get:
- wizard's windows is so bog, that I can't find where is ends, I can pass it using keyboard,
- calibre eats a lots of memory and almost kills machine with IO (swap is off),
- I get messages like:

Window manager warning: Window 0x40002f (calibre - ) sets an MWM hint indicating it isn't resizable, but sets min size 16383 x 16383 and max size 2147483647 x 2147483647; this doesn't make much sense.

QWidget::setMinimumSize: (/Preferences) The largest allowed size is (16777215,16777215)

(calibre:5569): Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion 'GTK_IS_WIDGET (widget)' failed