QT WebEngine Render process crashing

[rjrizzuto]

I just updated to Calibre Portable 5.17. Prior to that I was running 3.x I think.

I am getting an error message when opening an epub file. The error message is about the QT WebEngine Render process crashing. This seems to happen if I have Calibre Portable installed on a network drive, but doesn't happen when installed on a local drive.

Calibre Portable 3.x ran fine from a network drive.

[JSWolf]

I have Calibre on my laptop, but the libraries are on an external drive connected to another computer on my network. That works perfectly well.

[kovidgoyal]

Yes Qt WebEngine doesnt run from networked drives. So you can trun the calibre viewer or editor if you are running off a networked drive.

[rjrizzuto]

I don't understand the last post by kovindgoyal. Are you saying that QT webengine does or does not work from a network drive?

I know I had no issues with prior versions of Calibre installed on a network mapped drive at work. The filer is netapp, and I mount a location as p: Calibre runs fine, it is just when I try to open a pdf file to view it that I get the QT WebEngine crash.

[PeterT]

Originally Posted by kovidgoyal

Yes Qt WebEngine doesnt run from networked drives. So you can trun the calibre viewer or editor if you are running off a networked drive.

I believe Kovid meant

So you can't run the calibre viewer or editor if you are running off a networked drive.

Sent from my Pixel 4a using Tapatalk

[capink]

I think the misunderstanding might be arising from the fact that @rjrizzuto jumped from calibre 3.x (which uses QtWebKit) to calibre 5.x (which replaces QtWebKit with QtWebEngine).

The difference in behavior between the older version the new one is most probably because they use different web engines.

Porting to QtWebEngine was necessary because Qt is no longer supporting QtWebKit.

[Geremia]

I get this issue with the ebook-viewer of Calibre 5.37:

The Qt WebEngine Render process crashed with termination type: 2 and exit code: 31
Restarting Qt WebEngine
The Qt WebEngine Render process crashed with termination type: 2 and exit code: 31
The Qt WebEngine Render process crashed too often
The Qt WebEngine Render process crashed with termination type: 2 and exit code: 31
Restarting Qt WebEngine
The Qt WebEngine Render process crashed with termination type: 2 and exit code: 31
The Qt WebEngine Render process crashed too often
The Qt WebEngine Render process crashed with termination type: 2 and exit code: 31
The Qt WebEngine Render process crashed too often

I'm using Kovid's self-contained Linux 64-bit binary.

FragmentedPhoenix on Reddit posted a similar issue 2 days ago.

(I'm using proprietary Nvidia drivers, too.)

------------------------------------------------------------------------------------------------------------------------

It seems to be having trouble finding libiconv, which is in /opt/calibre/lib/libiconv.so.2 :

/opt/calibre/lib/libQt5WebEngine.so.5
        libiconv.so.2 => not found
/opt/calibre/lib/libQt5WebEngineCore.so.5
        libiconv.so.2 => not found
/opt/calibre/lib/libQt5WebEngineWidgets.so.5
        libiconv.so.2 => not found
/opt/calibre/lib/calibre-extensions/PyQt5.QtWebEngine.so
ldd: attenzione: permessi di esecuzione mancanti per `/opt/calibre/lib/calibre-extensions/PyQt5.QtWebEngine.so'
/opt/calibre/lib/calibre-extensions/PyQt5.QtWebEngineCore.so
ldd: attenzione: permessi di esecuzione mancanti per `/opt/calibre/lib/calibre-extensions/PyQt5.QtWebEngineCore.so'
/opt/calibre/lib/calibre-extensions/PyQt5.QtWebEngineWidgets.so
ldd: attenzione: permessi di esecuzione mancanti per `/opt/calibre/lib/calibre-extensions/PyQt5.QtWebEngineWidgets.so'

[kovidgoyal]

That's a bug in the nvidia drivers. Switch to the nouveau ones or use the Qt 6 betas from https://www.mobileread.com/forums/sh...d.php?t=344064

[androclus]

I too get the same error that Geremia gets, on two different linux boxes both running OpenSUSE Tumbleweed and KDE. Neither machine uses NVidia graphics hardware.(*) I am also using latest Calibre (5.37) as of this post, with the usual linux-installer.sh binary install, as at https://calibre-ebook.com/download_linux (which I've used for years). My calibre is installed locally in /opt/calibre (i.e. not on a networked drive). I do not get the libiconv.so.2 error message, as in the screenshot below, and /opt/calibre/lib/libiconv.so.2 does exist on my system. I also don't spot anything in systemd logs.

Anyway, here is a screenshot, if it will help.

As you can see, ebook-viewer crashes even before opening a book.

Let me know if there is any additional information I can supply.

(*)
1. Advanced Micro Devices, Inc. [AMD/ATI] Kaveri [Radeon R7 Graphics]
2. Advanced Micro Devices, Inc. [AMD/ATI] Turks XT [Radeon HD 6670/7670]

[androclus]

..although when I do this:

$ ldd /opt/calibre/lib/libQt5WebEngine.so.5 | grep found
libicudata.so.67 => not found
libiconv.so.2 => not found
$ _

although I'm not sure how relevant that is..

[beedaddy]

I can confirm the issue. But no nvidia drivers involved (graphic card is a AMD Radeon RX 5500 XT).

The Qt WebEngine Render process crashed with termination type: 2 and exit code: 159

[fimmy]

I had this problem also, I'm using arch linux and tried various things. I normally install using pacman command from the terminal but I have also installed pamac (manjaro's software installer that has a GUI for just in case scenario's)

With calibre already installed, I opened pamac and installed 'calibre ebook viewer' (but not the other calibre parts). My console filled with messages stating filex already exists moving to filex.old and it went ahead and re-installed the eBook viewer again (plus any required dependencies) I no longer get the QT WebEngine Render process crashing error.

[Macha]

same here : Arch system with no nvidia card
I was waiting for the 5.38 update but it did not correct the viewer ...

[henriquemaia]

Originally Posted by Macha

same here : Arch system with no nvidia card
I was waiting for the 5.38 update but it did not correct the viewer ...

Piling on on the same issue. I'm in the same boat, Arch Linux with no Nvidia. Cannot figure out what's causing this.

[kovidgoyal]

See what was updated recently in the pacman log and try rolling back a few of them, most likely mesa or anything gpu related or maybe the kernel.