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Some PDFs appear blurry in preview #1916
Description
Note: Please write your issue only in english
Description
When previewing a PDF, sometimes the top of the file appears blurry. This bug dissapears when you zoom in and scroll down, but it shows again if you zoom out.
Steps to reproduce
Steps to reproduce the behavior:
- Open a PDF file in kDrive to see the preview.
- In some files the effect is more visible than others. Try to zoom in and out and scroll through file.
Expected behavior
The PDF should be clearly visible, with no blurry parts.
Screenshots
Smartphone (please complete the following information):
- Device: Motorola Moto E20
- Android version: Android 11
- App version: 5.11.4
Additional context
Activity
LunarX commentedon Jan 6, 2026
Thanks for reporting this issue! We do reproduce this blurry PDF effect as well, we'll dig and take a look at what we can do.
rs1-es commentedon Jan 7, 2026
I just realized that this also happens with other files, like OpenDocumentText files:
tevincent commentedon Jul 17, 2026
Yes, the fact that it also happened with OpenDocumentText files is that it also use the PDF reader for that.
tevincent commentedon Jul 27, 2026
It should be fixed in 5.20.
rs1-es commentedon Aug 8, 2026
I'm using the 5.20.0 version on Android 11 and I still see this bug.
tevincent commentedon Aug 24, 2026
Can you try on 5.20.2 when it'll be available ? Thanks 🙏🏿
rs1-es commentedon Aug 27, 2026
The bug still appears when the PDF file is shown in preview, but it disappears when scrolling or zooming (as if it were refreshing).
v5.20.2 (Android 11)
tevincent commentedon Aug 28, 2026
So this time, it only appear when you first load the PDF and disappear when you zoom/move the pdf ?
rs1-es commentedon Aug 28, 2026
EDITED: I've said in the original message that this bug did not happen with PDF with scanned images, but I see some files that show this bug.
I think this was already happening before.
screen-20260828-112826_Compressed.mp4
tevincent commentedon Aug 28, 2026
Ok I managed to replicate this on my side. The fix is here: Infomaniak/android-pdfview#49. For now it's not merged and I'll keep this ticket open. But I'll let you know when it'll be available on kDrive.
rs1-es commentedon Oct 5, 2026
I just tested version 5.22.1 and all the PDFs render correctly; there are no longer any blurry parts. Thanks!