I'm not using Ubuntu but Arch and I'm affected by the same problem like Simon.
So it seems like to be an upstream bug.
I cannot reproduce the behaviour at all. It just randomly happens when (quickly?) going through photo collections.
Picture are on the SSD with XFS. Going back and forth “fixes” it, rarely I have to do this more than one time per picture.
dmesg's output does not show anything related to IO problems.
I'm not using Ubuntu but Arch and I'm affected by the same problem like Simon.
So it seems like to be an upstream bug.
I cannot reproduce the behaviour at all. It just randomly happens when (quickly?) going through photo collections.
Picture are on the SSD with XFS. Going back and forth “fixes” it, rarely I have to do this more than one time per picture.
dmesg's output does not show anything related to IO problems.