On Feb 18, 2006, at 8:47 AM, Dr Trevor J. Hutley wrote: > > On 17 Feb 2006, at 02:52, Lists wrote: > >> This has just started to happen since 10.4.5 (combo upgrade and >> permissions corrected) >> >> When I connect a DVI to my Powerbook, while running, both screens >> go black and never come back. I have to power down the machine >> uncleanly. > > I use my Al-book (10.4.5) - which is "on" 24/24 - with the DVI port > to an LCD projector several times a day with no problem. > I know that does not help you, but may show the problem is not > universal. Indeed.... in fact if I have the computer on for some time it appears to work fine. TjL