Frozen displays on Dell D3100

[ashrid]

Hi,

I have a Dell XPS 15 that has been working with the D3100 and 2 external screens for ~6 months now with no issues.

Last week both the external screens appeared to go blank, on investigation the issue appears to be that they are frozen as a CTRL-ALT-DEL will bring the primary monitor back to life until that screen is dismissed.

Further investigation revealed that dropping the colours down to 16 bit allow both monitors to be functional however I do not understand why they used to work at 32 bit colour and now don't.

The trigger for this issue appears to have been either then laptop monitor also being used as a 3rd display (up to that point the laptop lid was closed while connected) or an update to the NVidia driver (the laptop has both NVidia and Intel chipsets).

I have removed the DisplayLink, NVidia and Intel drivers and installed the latest versions but the issue persists. I have attached the output of the support tool.

Hopefully someone can offer some suggestions

Thanks