Calibri suddenly showing empty ebooks

k1234556 · 07-09-2023, 04:37 PM

I have been using Calibri successfully for many years to read ebooks but suddenly the viewer shows the ebooks as if they are empty. For example, if I open the "Quick Start Guide" that comes with Calibri it looks like the screenshot, no matter which section I select in the table of contents. I did recently upgrade to 6.22, however it was working after the upgrade, and then stopped working about a week later. I included the debug log as well. If anyone has any advice or suggestions I would appreciate it. Thank you

ApplicationPaletteChange event ignored
Using calibre Qt style: True
calibre Debug log
calibre 6.22 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None
calibre 6.22 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None
QPA platform: windows
devicePixelRatio: 1.25
logicalDpi: 96.0 x 96.0
physicalDpi: 87.37599999999999 x 87.60718562874251
[0.00] Starting up...
[0.00] Showing splash screen...
[0.16] splash screen shown
[0.16] Initializing db...
[0.16] db initialized
[0.16] Constructing main UI...
Using proxies: {'no': '192.168.99.100'}
[0.64] main UI initialized...
[0.64] Hiding splash screen
Starting QuickView

theducks · 07-09-2023, 05:05 PM

I move this to Viewer since what you show is the users guide.

I wonder if this is a (system) Dark Mode issue.
Preferences: Look and Feel
Interface style: Try Calibre style (restart may be needed)
Color Palllet: Light

kovidgoyal · 07-09-2023, 11:07 PM

This is most likely the usual viewer blank/black screen caused by GPU driver incompatibility with Qt WebEngine. Try updating your GPU drivers if that doesnt work try turning off hardware acceleration in the viewer via the environment variable as described here: https://doc.qt.io/qt-6/qtwebengine-debugging.html

JSWolf · 07-10-2023, 05:40 AM

It's calibre, not calibri.

07-09-2023, 04:37 PM	#1
k1234556 Junior Member Posts: 1 Karma: 10 Join Date: Jul 2023 Device: none	Calibri suddenly showing empty ebooks I have been using Calibri successfully for many years to read ebooks but suddenly the viewer shows the ebooks as if they are empty. For example, if I open the "Quick Start Guide" that comes with Calibri it looks like the screenshot, no matter which section I select in the table of contents. I did recently upgrade to 6.22, however it was working after the upgrade, and then stopped working about a week later. I included the debug log as well. If anyone has any advice or suggestions I would appreciate it. Thank you ApplicationPaletteChange event ignored Using calibre Qt style: True calibre Debug log calibre 6.22 embedded-python: True Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE') ('Windows', '10', '10.0.19045') Python 3.10.1 Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free') Interface language: None calibre 6.22 embedded-python: True Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE') ('Windows', '10', '10.0.19045') Python 3.10.1 Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free') Interface language: None QPA platform: windows devicePixelRatio: 1.25 logicalDpi: 96.0 x 96.0 physicalDpi: 87.37599999999999 x 87.60718562874251 [0.00] Starting up... [0.00] Showing splash screen... [0.16] splash screen shown [0.16] Initializing db... [0.16] db initialized [0.16] Constructing main UI... Using proxies: {'no': '192.168.99.100'} [0.64] main UI initialized... [0.64] Hiding splash screen Starting QuickView Attached Thumbnails

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07-09-2023, 05:05 PM	#2
theducks Well trained by Cats Posts: 29,977 Karma: 56143930 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	I move this to Viewer since what you show is the users guide. I wonder if this is a (system) Dark Mode issue. Preferences: Look and Feel Interface style: Try Calibre style (restart may be needed) Color Palllet: Light

07-09-2023, 11:07 PM	#3
kovidgoyal creator of calibre Posts: 44,018 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	This is most likely the usual viewer blank/black screen caused by GPU driver incompatibility with Qt WebEngine. Try updating your GPU drivers if that doesnt work try turning off hardware acceleration in the viewer via the environment variable as described here: https://doc.qt.io/qt-6/qtwebengine-debugging.html

07-10-2023, 05:40 AM	#4
JSWolf Resident Curmudgeon Posts: 74,639 Karma: 130140792 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	It's calibre, not calibri.

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