When trying to add a raster layer (georeferenced jpg-files) QGIS becomes non-responsive. I have tested the jpgs and they are not corrupted, sometimes they appear and it works for a little while before QGIS freezes and somtimes the programme freezes while loading the images. I am using the latest version 2.12 Lyon, but had the same problem with Lisboa. My PC has 7GB ram and the jpgs are not larger than 16 to 20mb. I have loaded images in QGIS before, without problems.
Any suggestions to why QGIS becomes non-responsive?