1px permanently white at fixed location on screen (but not dead pixel)???

[mke]

Hi all.

I have an... odd... problem.

I bought a new cinema display today. Happily, I hooked it up. Unhappily, I noted it had a dead "hot pixel" - a permanently white pixel at the bottom left corner of the screen.

Rearranging my screen layout such that the new cinema display was to the right of my powerbook's built-in LCD (as opposed to above it previously) *removed* the dead pixel.

Playing around some more I found out that the dead pixel is screenshottable, and moves along with the placement of the cinema display relative to my main display.

In other words, it's not a dead pixel, but obviously a software problem.

Perhaps it's a 1px * 1px application that "hides" itself by moving a negative amount of pixels off the screen and is now being picked up since my monitor occupies this screen area?

Has anyone heard of anything like this?

mke

 

[mad jew]

Does it hide behind any apps or any specific colours?

 

[mke]

It hides below the mouse pointer, but it's above _everything_ else. I tried with a fair few programs and it's always on-top. I tried PiXeL Check 1.2 and it's even above that thing's colour display.

And yeah, it shows up white over every colour background.

Edit: It's at an absolute pixel loc of about (0,-30) or so, relative to the main display - so just above the Menu bar at the far left.

 

[DaLurker]

It hides below the mouse pointer, but it's above _everything_ else. I tried with a fair few programs and it's always on-top. I tried PiXeL Check 1.2 and it's even above that thing's colour display.

And yeah, it shows up white over every colour background.

Edit: It's at an absolute pixel loc of about (0,-30) or so, relative to the main display - so just above the Menu bar at the far left.

I know this might sound stupid, but you try restarting?

 

[CaptainHaddock]

Bizarre. It sounds like possibly a faulty memory address or something on your video card.

I occasionally get a small cluster of 4 or so white pixels near my Trash in the Dock. This appears to be a Quartz or driver bug, since it's intermittent and has occurred on both my Macs.

 

[mke]

It's not a faulty memory address for sure It doesn't show up under any other users on the machine apart from mine, and it only appears about 2-3 seconds after logging in (then of course stays until I log out.)