Viewer unresponsive when in High Contrast

Pablotacho · 03-05-2021, 11:40 AM

Hello forum,

I have Calibre 5.12 installed in both my Windows 10 PC and laptop. I like using the High Contrast theme from Windows (Settings, Easy of Use) and it works fine in both devices. The problem is with the Calibre Viewer under this setting. The viewer will pop up immediately, then stay blank for a long time and finally respond but excruciatingly slowly. When not in High Contrast, the viewer works perfectly fine.

Now, the thing is that it happens only with my PC and not with my laptop. Both are HP, x64, Windows Home. And both are configurated equally.

Also in both cases, I have the Calibre interface style: System. I've tried to change it to: Calibre, but the problem persist, only in my PC, as long as Windows in in High Contrast.

Any ideas? Thank you in advance!

theducks · 03-05-2021, 02:59 PM

Video driver or GPU (the video section) differences

Pablotacho · 03-08-2021, 08:00 PM

Quote:

Originally Posted by theducks

Video driver or GPU (the video section) differences

Thank you fort your brief but informative post. The card of the affected computer is an Intel 4600. I made sure to have the latest driver, but still no chance. Is anything else I can try to do or am I stuck as long as I have this card?

kovidgoyal · 03-08-2021, 10:05 PM

You can also try turning off hardware acceleration as described here: https://doc.qt.io/qt-5/qtwebengine-debugging.html

Pablotacho · 03-09-2021, 04:00 AM

Quote:

Originally Posted by kovidgoyal

You can also try turning off hardware acceleration as described here: https://doc.qt.io/qt-5/qtwebengine-debugging.html

Thank you Kovid, I will give it a try!

03-05-2021, 11:40 AM	#1
Pablotacho Junior Member Posts: 3 Karma: 10 Join Date: Mar 2021 Device: Kindle Paperwhite	Viewer unresponsive when in High Contrast Hello forum, I have Calibre 5.12 installed in both my Windows 10 PC and laptop. I like using the High Contrast theme from Windows (Settings, Easy of Use) and it works fine in both devices. The problem is with the Calibre Viewer under this setting. The viewer will pop up immediately, then stay blank for a long time and finally respond but excruciatingly slowly. When not in High Contrast, the viewer works perfectly fine. Now, the thing is that it happens only with my PC and not with my laptop. Both are HP, x64, Windows Home. And both are configurated equally. Also in both cases, I have the Calibre interface style: System. I've tried to change it to: Calibre, but the problem persist, only in my PC, as long as Windows in in High Contrast. Any ideas? Thank you in advance!

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03-05-2021, 02:59 PM	#2
theducks Well trained by Cats Posts: 31,047 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Video driver or GPU (the video section) differences

03-08-2021, 10:05 PM	#4
kovidgoyal creator of calibre Posts: 45,345 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You can also try turning off hardware acceleration as described here: https://doc.qt.io/qt-5/qtwebengine-debugging.html

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