Thread: Any way to disable hardware rendering in the new reader?
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Old 03-09-2020, 10:14 PM   #12
sjfan
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Quote:
Originally Posted by DNSB View Post
Not sure if this works but from the referenced web page, it appears possible that you could use:

QTWEBENGINE_CHROMIUM_FLAGS="--disable-gpu" ebook-viewer

to disable using the GPU only for the calibre's ebook viewer.
That'd work if you were running the ebook viewer from a command line shell, which he probably isn't.

The environment variable itself is what you need to set wherever Kuram's OS stores those things (https://www.computerhope.com/issues/ch000549.htm if it's some version of Windows).

If you really want to have it affect only the ebook-viewer and not other QTWEBENGINE_CHROMIUM programs, you could make a batch file that sets it and runs ebook-viewer and set that as your default program to open epubs. It's fairly unlikely he's got any other QTWEBENGINE_CHROMIUM programs installed other than calibre, though, so that's probably overkill (especially since he's having trouble just setting the environment variable).
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