LXDE: PCManFM Thumbnails of images > 2MB are not shown

Question

Im using LXDE, with PCManFM but images bigger than 2MB are just shown with image-symbol and not with the thumbnail. How Can I change that behavior?

Answer 1

By default pcmanfm limits the size of files to show thumnails to 2 Mb.

Go in the menu Edit > Preferences > Display

At the bottom, change the value of "Do not generate thumbnails for file exceeding this size" from 2000 KB to a larger size.

10000 KB (10MB) perhaps. Depends on the size of your pictures.

Answer 2

It works, but it's strange that I'm viewing PNGs of very small size (eg 100Kb) but I have to set that limit to 65536Kb in order for the thumbnail to be shown... – Yan King Yin Jun 13 '17 at 10:07

I have just noticed this issue with JPG files (85 in a folder) of maybe 500 KiB - and they would generate a thumbnail. Other images (maybe larger ones of 1.1 MiB, maybe random size, I forget) would NOT show a thumbnail. This is despite adjusting the above setting to 3500 KiB for the thumbnail generation threshold. The largest image is 1.2 MiB approx.

I just experimented and adjusted it UPWARDS to 10 MiB, and suddenly it works! Bug-gery! I couldn't establish a logical pattern to it apart from this. Same principle as you, it seems, different threshold. I suggest a RAM allocation issue subjective to installation, but am not skilled enough to debug this (yet!)

PCManFM 1.2.4 on LXLE 14.04 (yes I know it's obsolete but is the bug gone?).