Calibre Starts, but Soon Hangs

idwtgyai · 05-21-2022, 03:30 AM

I recently upgraded from Fedora 35 to Fedora 36. Calibre was working fine before the upgrade. Now, Calibre starts fine, but when I leave it alone for a while, say, an hour, when I go back, the GUI is frozen and GNOME (Wayland) reports the application is not responsive. No matter how long I wait, Calibre never recovers and I have to force-quit.

Oh, I'm using the "local" install method. Current version is calibre-5.42.0-x86_64.txz

kovidgoyal · 05-21-2022, 05:52 AM

Probably a wayland issue in gnome, the pair of them are the most buggy things on the planet. Use the Qt env var to either force x11 or wayland and see which works.

idwtgyai · 05-21-2022, 06:18 PM

Okay, I'll try QT_QPA_PLATFORM=xcb;eglfs. I tried with =wayland and unset, already.

idwtgyai · 05-22-2022, 09:27 PM

Hmm, neither of the options I've tried prevented the issue.

QT_QPA_PLATFORM settings I've tried:

unset/not set -> hangs
set to "wayland" -> hangs
set to "xcb;eglfs" -> hangs
set to "eglfs" -> hangs

kovidgoyal · 05-22-2022, 09:55 PM

No clue then, sorry. Try using an empty calibre config by renaming ~/.config/calibre and see if it still reproduces.

idwtgyai · 06-03-2022, 07:29 PM

Hmm, I tried that; no joy. Strange. It's weird how it works for a little while after I start it up. It always happens when I'm not watching it. I don't know what to interpret from that.

idwtgyai · 06-06-2022, 02:48 PM

Hmm, I tried that; no joy. Strange. It's weird how it works for a little while after I start it up. It always happens when I'm not watching it. I don't know what to interpret from that.

When it gets stuck, I see "Worker" taking 100% CPU, if that helps.

Also, I installed my distro's pkg and that runs fine. It looks like it works better in GNOME 40, also; window decorations look more conformant. I noticed that, while installing that package, several other required pkgs were installed. I wonder if I didn't have the all the necessary dependencies satisfied, but, if I'm reading it correctly, the download page says that the local installer installs all dependencies. The distro pkg depends on jxrlib, libjpeg-turbo-utils, python3-cchardet, & python3-pychm. But, I suppose the pkg maintainer could choose to build and bundle it however they want, so that might not be indicative.

Anyway, thanks for the great tool.

05-21-2022, 03:30 AM	#1
idwtgyai Member Posts: 21 Karma: 10 Join Date: Aug 2017 Device: kobo	Calibre Starts, but Soon Hangs I recently upgraded from Fedora 35 to Fedora 36. Calibre was working fine before the upgrade. Now, Calibre starts fine, but when I leave it alone for a while, say, an hour, when I go back, the GUI is frozen and GNOME (Wayland) reports the application is not responsive. No matter how long I wait, Calibre never recovers and I have to force-quit. Oh, I'm using the "local" install method. Current version is calibre-5.42.0-x86_64.txz Last edited by idwtgyai; 05-21-2022 at 03:30 AM. Reason: add more info

05-22-2022, 09:27 PM	#4
idwtgyai Member Posts: 21 Karma: 10 Join Date: Aug 2017 Device: kobo	Hmm, neither of the options I've tried prevented the issue. QT_QPA_PLATFORM settings I've tried: unset/not set -> hangs set to "wayland" -> hangs set to "xcb;eglfs" -> hangs set to "eglfs" -> hangs

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05-21-2022, 05:52 AM	#2
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Probably a wayland issue in gnome, the pair of them are the most buggy things on the planet. Use the Qt env var to either force x11 or wayland and see which works.

05-21-2022, 06:18 PM	#3
idwtgyai Member Posts: 21 Karma: 10 Join Date: Aug 2017 Device: kobo	Okay, I'll try QT_QPA_PLATFORM=xcb;eglfs. I tried with =wayland and unset, already.

05-22-2022, 09:55 PM	#5
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No clue then, sorry. Try using an empty calibre config by renaming ~/.config/calibre and see if it still reproduces.

06-03-2022, 07:29 PM	#6
idwtgyai Member Posts: 21 Karma: 10 Join Date: Aug 2017 Device: kobo	Hmm, I tried that; no joy. Strange. It's weird how it works for a little while after I start it up. It always happens when I'm not watching it. I don't know what to interpret from that.

06-06-2022, 02:48 PM	#7
idwtgyai Member Posts: 21 Karma: 10 Join Date: Aug 2017 Device: kobo	Hmm, I tried that; no joy. Strange. It's weird how it works for a little while after I start it up. It always happens when I'm not watching it. I don't know what to interpret from that. When it gets stuck, I see "Worker" taking 100% CPU, if that helps. Also, I installed my distro's pkg and that runs fine. It looks like it works better in GNOME 40, also; window decorations look more conformant. I noticed that, while installing that package, several other required pkgs were installed. I wonder if I didn't have the all the necessary dependencies satisfied, but, if I'm reading it correctly, the download page says that the local installer installs all dependencies. The distro pkg depends on jxrlib, libjpeg-turbo-utils, python3-cchardet, & python3-pychm. But, I suppose the pkg maintainer could choose to build and bundle it however they want, so that might not be indicative. Anyway, thanks for the great tool.

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