When I make a call, as soon as I select call, the screen goes black and stays black until a few seconds after they answer. I can't end a call until they answer or their voicemail kicks in. It's only just started doing this, what have I done wrong?

What device are you using? This may help others determine you problem better

I'm an idiot, Nokia n900.

headset can do the end-call thing...

but if your screen is turning off there might be something wrong with proximity sensor..

try opening keyboard during call when your screen wink

@Toilet sniffer V
if you cant fix black screen then install phone speakers switcher from the repositories then go to sittings and select it then you can see a choice to end calls by holding but not pressing the camera button

./sifo

Cheers guys, thanks for your help, I'll give it a go.

Hi guys, it's still doing it, has anyone else got any good ideas? It won't let me do anything, if I open the keyboard, a few seconds later it's fine but by then it's already half way through their voicemail message. Have I installed an app that's done this or is there anything in the settings I can change? It's doing my head in.

Thanks

@Toilet sniffer V

reflash your N900 this is the best way to clean it up

That's what I was worried you'd say.

are you scared from flashing and finding it is a hard thing to do ? or it is about losing data ? anyway this is a very easy flash guide you just need to use your english

./sifo