Can't see Calibre window in Linux GUI

[anleva]

I am unable to see the Calibre window in my GUI. It is running as I can see the Calibre icon in the system tray. When I click on "show/hide main window" I still don't see Calibre on screen but the choice changes in the system tray icon menu.

This is for all of the 3.x releases of Calibre 64 bit Linux. When I revert back to 2.x releases I can see the window/app again.

I am running Ubuntu 16.04.3 LTS

[theducks]

Multiple screens at some point in time? It may be now be off-screen.

[anleva]

No multiple screens. It works, appears, when I downgrade to 2.x

[kovidgoyal]

Tun calibre ina terminal as

calibre-debug -g

and you will likely get some useful debug output that might tell us what the problem is.

[anleva]

Originally Posted by kovidgoyal

Tun calibre ina terminal as

calibre-debug -g

and you will likely get some useful debug output that might tell us what the problem is.

Is there a debug log somewhere after running this command? it is still a problem with the 3.x releases.

This was the output of running that command:

calibre-debug -g
calibre 3.8 embedded-python: True is64bit: True
Linux-4.4.0-96-generic-x86_64-with-debian-stretch-sid Linux ('64bit', 'ELF')
('Linux', '4.4.0-96-generic', '#119-Ubuntu SMP Tue Sep 12 14:59:54 UTC 2017')
Python 2.7.12
Linux: ('debian', 'stretch/sid', '')
Interface language: None
Turning on automatic hidpi scaling
GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications.
devicePixelRatio: 1.0
logicalDpi: inf x inf
physicalDpi: -49497354.5002 x -87977555.9019
Using calibre Qt style: True

[kovidgoyal]

That is the debug log and the problem is that Qt is unable to detect your monitors geometry correctly,s ee the lines

logicalDpi: inf x inf
physicalDpi: -49497354.5002 x -87977555.9019

This happens on some X servers, with newer versions of Qt, but no one has been able to track down why.

[anleva]

Originally Posted by kovidgoyal

That is the debug log and the problem is that Qt is unable to detect your monitors geometry correctly,s ee the lines

logicalDpi: inf x inf
physicalDpi: -49497354.5002 x -87977555.9019

This happens on some X servers, with newer versions of Qt, but no one has been able to track down why.

Thanks. Any thoughts on why does it work for 2.xx releases and earlier and not 3.xx? It looks like a different version of python, 2.7.12 vs 2.7.9. Could that be it?

When I revert to 2.85.1 this is the output of the debug command:


calibre 2.85.1 embedded-python: True is64bit: True
Linux-4.4.0-96-generic-x86_64-with-debian-stretch-sid Linux ('64bit', 'ELF')
('Linux', '4.4.0-96-generic', '#119-Ubuntu SMP Tue Sep 12 14:59:54 UTC 2017')
Python 2.7.9
Linux: ('debian', 'stretch/sid', '')
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 44.2540834846 x 44.2451612903

[kovidgoyal]

Not a different version of python, a different version of Qt.