calibre WINDOWS 64-bit 7.17.0, "E-book viewer" stuck on "Loading book..."

[tjludico]

I have been using Calibre for years, always with great satisfaction and appreciation for its author.

Today, I updated from version 7.13 to 7.22, excited to try out its new features.

However, I found that the books get stuck on "loading" (showing the book's index in the background).

I have installed all the portable versions from 7.13 to 7.18, and everything works fine up to 7.16. The first version that doesn't work for me is 7.17.

I don't know if it's a bug or an issue with my computer (which is quite old, but otherwise I don't have any problems).

I would appreciate any suggestions or help.

Thank you very much.

[kovidgoyal]

Try updating your graphics drivers and also try running in safe mode. If neither of those work then I suggest you stay with 7.16 on this computer.

[tjludico]

Dear Kovid Goyal,

Following your advice, I updated my graphics drivers. Below are the details of my graphics card and driver updates:

**GRAPHICS CARD**
- Manufacturer: NVIDIA
- Driver Description: NVIDIA GeForce GT 710
- Driver Provider: NVIDIA

**BEFORE UPDATE:**
- Driver Version: 27.21.14.5671 (GeForce 456.71)
- Driver Date: 30-Sep-2020
- DCH/UWD Driver: Not Capable

**AFTER UPDATE:**
- Driver Version: 30.0.14.7514 (GeForce 475.14)
- Driver Date: 10-Jun-2024
- DCH/UWD Driver: Capable

Additionally, I tested the same version of Calibre on Linux and Windows 10. Here are the results:
- On Linux (Deepin 23), the eBook reader works without any issues.
- On Windows 10, the viewer remains stuck and fails to open the book, although the index is visible in the background.

I hope these details are helpful in identifying and potentially resolving any underlying bugs. Thank you very much for your time and assistance.

Best regards,

Tomás J. Cantó

[michailbachtin]

Hello Tomás and Kovid Goyal:

I'm stuck with the same issue, also using a Nvidia GeForce graphics card: GeForce 9600M GT on Windows 10.

Have you tried disabling the GPU with:

QTWEBENGINE_CHROMIUM_FLAGS="--disable-gpu"

For the moment, this has not seemed to work with me, but I may have entered it incorrectly.

I would appreciate any help you can offer.

Best wishes,

Brian Poole

[kovidgoyal]

Just stay with calibre 7.16 for the moment eventually either a GPU update or a Qt update should fix the issue. Qt shippe dwith calibre will likely be updated for calibre 8

[Peter 123]

Hello,

I just registered, first of all to say a big Thank You to kovidgoyal for all the great work he does for all of us with Calibre.

Then I am glad to report that indeed with version 8.0.1 for me all the problems described in this thread are gone. Perfect.

[kovidgoyal]

You are welcome!