Viewer not opening any ebooks

[jenrar]

I saw the original message and tried that before I saw your addition. And...it still didn't work.

As for the dual video chipset, I don't know? No, I guess I am? I looked up how to tell, and I do have two things listed under Display adapters:

Intel(R) UHD Graphics
NVIDIA GeForce RTX 3060 Laptop GPU

How do I know which Calibre is using?

Originally Posted by JSWolf

Disable everything in Startup and reboot. Then try calibre again and see if it works. If it works, it's something you run at start.

Are you on a laptop with dual video chipsets? If so, before doing the above suggestion, have calibre run with the other GPU it's not currently running with. If that and the above suggestion fails, add the following environment variable and reboot.

QTWEBENGINE_CHROMIUM_FLAGS=--disable-gpu

[jenrar]

Okay, so I googled and thought I figured out how to do it, and I tried both, and still doesn't work.

Originally Posted by jenrar

I saw the original message and tried that before I saw your addition. And...it still didn't work.

As for the dual video chipset, I don't know? No, I guess I am? I looked up how to tell, and I do have two things listed under Display adapters:

Intel(R) UHD Graphics
NVIDIA GeForce RTX 3060 Laptop GPU

How do I know which Calibre is using?

[JSWolf]

Originally Posted by jenrar

I saw the original message and tried that before I saw your addition. And...it still didn't work.

As for the dual video chipset, I don't know? No, I guess I am? I looked up how to tell, and I do have two things listed under Display adapters:

Intel(R) UHD Graphics
NVIDIA GeForce RTX 3060 Laptop GPU

How do I know which Calibre is using?

My laptop also runs an NVIDIA GeForce 3060 GPU as well as the Intel UHD Graphics.

Here is how to select which GPU an app uses...

[jenrar]

I tried both. Google just said restart Calibre. Should I try switching and restarting the laptop, not just Calibre?

Thank you so much for trying to help!

Originally Posted by JSWolf

My laptop also runs an NVIDIA GeForce 3060 GPU as well as the Intel UHD Graphics.

Here is how to select which GPU an app uses...

Attachment 219678

[JSWolf]

Originally Posted by jenrar

I tried both. Google just said restart Calibre. Should I try switching and restarting the laptop, not just Calibre?

Thank you so much for trying to help!

Now try the environment variable I posted.

QTWEBENGINE_CHROMIUM_FLAGS=--disable-gpu

[jenrar]

I was going to, but I don't know where to put that...

[BetterRed]

Originally Posted by jenrar

I was going to, but I don't know where to put that...

If you type 'set envir' in Start menu it should pop "Edit environment variables for your account" click Open and enter a new User environment variable.



BR

[jenrar]

Did that, looked just like the image you showed. Still not working.

Originally Posted by BetterRed

If you type 'set envir' in Start menu it should pop "Edit environment variables for your account" click Open and enter a new User environment variable.

Attachment 219679

BR

[BetterRed]

Then you will have to do what several responders have already suggested.

Disable all startup tasks, confirm the problem has gone away. If it has re-enable the startup tasks one-by-one and do a restart between each until you find the culprit. BTW you do have a firewall - Fort.exe

BR

[jenrar]

I've already done that. I disabled them all, and it still won't open any books.

And yes, I know. But I tried it with that disabled too, and still nothing.

What's odd is that I have one .epub in a different location (on my desktop) because I copied and pasted it there to remind myself I wanted to read it soon, and that opens fine. I tried that with a different book just now, and that one won't open. So not sure why one will but all others won't.

*sigh*

By the way, did I need to like browse directory or browse file when I put in that environment thingy?

Originally Posted by BetterRed

Then you will have to do what several responders have already suggested.

Disable all startup tasks, confirm the problem has gone away. If it has re-enable the startup tasks one-by-one and do a restart between each until you find the culprit. BTW you do have a firewall - Fort.exe

BR

[jenrar]

Okay, so I didn't do anything else, other than delete the environment thingy, and now my books are opening just fine (and as quickly as they ever did). *sigh*

[BetterRed]

Originally Posted by jenrar

I've already done that. I disabled them all, and it still won't open any books.

And yes, I know. But I tried it with that disabled too, and still nothing.

Sorry, I must have missed seeing that.

Let me recap my understanding of what you're telling us:

In Windows Safe mode you can read an epub that is in a calibre library, but in Windows "Normal" mode you can't read the same book in the same library - even after disabling all Start Up tasks and restarting Windows.

Did you use Safe Mode Minimal?

Originally Posted by jenrar

What's odd is that I have one .epub in a different location (on my desktop) because I copied and pasted it there to remind myself I wanted to read it soon, and that opens fine. I tried that with a different book just now, and that one won't open. So not sure why one will but all others won't.

Whoa, that suggests it's the data!

What did you do to the book on the desktop that won't open, that you did not do with the book on the desktop that will open - e.g. convert, edit, embed metadata etc etc.

Originally Posted by jenrar

By the way, did I need to like browse directory or browse file when I put in that environment thingy?

No

BR

[jenrar]

Yes, that's right. (Or was.) Yes, it was minimal.

But ALL ebooks open fine now. In the Calibre folder or not. I have no idea why. I didn't do anything else. Everything is reset to like it was (all the startup stuff is on, including my firewall), I'm not in safe mode, etc etc.

So I don't know. I mean, I'm THRILLED it's working again, but...it's also super frustrating! LOL

Originally Posted by BetterRed

Sorry, I must have missed seeing that.

Let me recap my understanding of what you're telling us:

In Windows Safe mode you can read an epub that is in a calibre library, but in Windows "Normal" mode you can't read the same book in the same library - even after disabling all Start Up tasks and restarting Windows.

Did you use Safe Mode Minimal?

Attachment 219680


Whoa, that suggests it's the data!

What did you do to the book on the desktop that won't open, that you did not do with the book on the desktop that will open - e.g. convert, edit, embed metadata etc etc.



No

BR

[BetterRed]

Originally Posted by jenrar

Okay, so I didn't do anything else, other than delete the environment thingy, and now my books are opening just fine (and as quickly as they ever did). *sigh*

"sigh* indeed, there is something seriously weird about your system. I have no further suggestions.

BR

[jenrar]

Hehe Thank you for your help (as well as thanks to the others!).

Originally Posted by BetterRed

"sigh* indeed, there is something seriously weird about your system. I have no further suggestions.

BR