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#1 |
Junior Member
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Karma: 10
Join Date: Aug 2024
Device: None
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Preview failure
Running Sigil 2.3.0 on an old, but up to date Windows 10 PC, and when I try to open the Sigil User Guide (for example; I assume this will run in Sigil…seems like a reasonable assumption/test case
![]() Any other doc I’ve loaded (like the book I’m working on, which displays a TOC just fine) I have no preview at all of. I’ve searched high and low for a clue about what’s going on, but no joy. Am I simply doing something dumb that’s causing this? |
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#2 |
null operator (he/him)
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Join Date: Mar 2012
Location: Sydney Australia
Device: none
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Working fine here: Sigil 2.3.0 Win 10.
Which version of the User Guide? Latest is here ==> Sigil User Guide - Sigil-Ebook BR |
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#3 |
Grand Sorcerer
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Karma: 198099188
Join Date: Jan 2010
Device: Nexus 7, Kindle Fire HD
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Try ticking the box in Sigil's preferences to disable hardware acceleration in Qt/WebEngine. The guide has tons of images and has embedded fonts. Aging hardware and the newer Qt6 in Sigil 2.3.0 are likely combining to cause problems.
Last edited by DiapDealer; Yesterday at 10:07 AM. |
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#4 |
Junior Member
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Join Date: Aug 2024
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Preview failure
Thanks. Made the preferences change, but the problem persists after restart. I would prefer that “aging hardware,” much as it makes sense, not be the only remaining diagnosis; any other ideas?
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#5 |
Sigil Developer
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Join Date: Nov 2009
Device: many
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You may have an anti-virus program that is interfering with the QWebEngineProcess application that runs behind the scenes.
You may have a firewall setting that interferes with even local sockets to prevent inter-process communications. You may have an unsupported graphics driver. Have you tried updating to the very latest driver for your graphics card? Fire up Sigil and load the Users Guide and navigate to any page. Even if Preview is blank, try hitting the Inspector button on the Preview Toolbar. Does the Inspector open? Can you see anything? If so, look at the source code via Preview's Inspector, Does it look similar to what CodeView is showing (after uncollapsing the code whereneeded). It you see it just for a flash and it goes away, then something is interfering with Qt's QWebEngine, most probably really misguided anti-virus software. Perhaps your aging processor does not support AVX or other advanced registers required? Last edited by KevinH; Yesterday at 07:38 PM. |
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#6 |
Grand Sorcerer
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Karma: 198099188
Join Date: Jan 2010
Device: Nexus 7, Kindle Fire HD
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After eliminating anti-virus as the culprit, try creating an environment variable named QSG_RHI_BACKEND and setting its value to "opengl" (no quotes), and then launch Sigil. This should eliminate the possibility that your d3d11 (now the default) implementation is not quite up to snuff by forcing all QtQuick stuff to use opengl instead.
Last edited by DiapDealer; Yesterday at 08:55 PM. |
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#7 |
Sigil Developer
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And then there is this bug related to CPUs without AVX and SSE4 which causes the QtWebEngine render process to crash.
https://bugreports.qt.io/browse/QTBUG-123811 So does you older hardware cpu support AVX and SSE4? Last edited by KevinH; Yesterday at 09:52 PM. |
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