I use this:
void CGraphicsAppUi::ConstructL()
{
BaseConstructL();

RWsSession &ws = iEikonEnv->WsSession();
TInt bufsize = 10000;
ws.SetBufferSizeL(bufsize);
ws.SetKeyboardRepeatRate(80, 1);

iAppView = CGraphicsAppView::NewL(ApplicationRect());

AddToStackL(iAppView);
}

But it does not work! Key repeat slowly like before. Where is wrong?