Graphics hardware dependent problem

We’re adding data to a data series form a background thread. We noticed that on some hardware (especially notebooks) the sci chart surface is not updated. Only a window rezise forces an screen update.

We enabled sci chart logging and debugging, but we didn’t see any suspicious logging output.
The data are being added within a block like this:
using (dataSeries.SuspendUpdates)
{
dataSeries.Append(…)
}

The strange thing is, that the x-Axis labeling gets updated (range change), but dataSeries Content won’t be drawn on some machines (more often on notebooks)

Do you have any idea what could lead to this behaviour?

Thanks in advance!
Gerhard