C
Charlie Tame
My guess is (if other things are working at the time) the video hardwarehielan' laddie said:Well, for example, there's what I mentioned further down but you snipped:
"Do you have the 'black-screen-with-mouse-pointer' problem? Basically what
happens every ever so often (such as _right now_, which is why I'm typing
this on my Mac...) when I boot Vista I get perfectly normal behaviour all the
way to the password entry screen. I enter my password, and get the 'welcome'
screen with the spinning circle. That sits there for a while, as usual, and
then the screen goes black, again as usual... except that usually when it
does, it shows the mouse pointer and the spinning circle, and it almost
immediately starts loading the Vista desktop. About one third of the time,
instead of that, I just get the mouse pointer in a perfectly black screen.
There's disk activity. There's sound effects. Just nothing visible except the
mouse pointer. Clicking, left or right, does _nothing_. Most of the time,
hitting control-alt-delete brings up the task manager and I can log out and
log back in... and this time everything is just fine. Sometimes
control-alt-delete does _nothing_, and the only cure is a power-switch
shutdown and reboot. If I'm in a hurry, it's faster to move to the Mac than
to fiddle with Vista..."
That problem is Windows Explorer going tits-up on startup.
In addition, there's this other common problem, which I mentioned a little
below that:
"Every ever so often the Vista desktop crashes and I get a little note about
a problem with the drivers. I have most current drivers installed. I tried
rolling back; things got worse. I have a NVIDI GeForce 6200 video card; not
exactly top of the line, to be sure, but still a fairly good card."
The black screen on startup doesn't show as an error in the PRS. The crashing
desktop shows as either Video Hardware Error or Could Not Find Driver
Software.
Given that the same hardware worked fine with XP and works fine _most_ of the
time with Vista, I suspect that there's more to it. The fact that the black
screen is not reported as an error makes me wonder what on Earth is going on.
is displaying but not on the right "Screen", e.g. you have 2 monitors
but the display is on #3 - for want if a simple explanation. This would
explain why there's no error message and it "thinks" everything's fine.
It sounds like a hardware problem / driver problem or a memory (On the
video card) problem. If you have say an NVidia based motherboard there
are drivers for things like the PCI bus so check those for your MB maker
since if PCI is not being driven properly then a PCI, PCIE or even maybe
AGP device could be getting a valid but useless address...
I am a long way from being a hardware expert but I have seen a few very
odd "Random" effects over the years that eventually come down to some
timing error between devices, and it not always video - video driver
trouble, it could be something else - even the BIOS picking the wrong
default video device.