Precision M4400 Owner's Lounge

So I've had two flickering issues with my RGBLED, so let me clarify which is which for those who have not read the whole thread.

The first is an intermittent flicker where the screen basically goes black for a 60th of a second or so (a guess). The first number of times I was thinking that it was an optical illusion caused by moving my eyes or something, but I've concentrated on it and know it is a real flicker. It does not occur if the brightness is high, only at lower brightness.

The second was on my windows machine where I was noticing a continuous flicker at times, not all times, when on battery power. I traced this down to the "all day battery" profile or something like that, which was putting the display into a 40Hz display mode.

 

After doing this latest power pull, the flickering has actually been basically gone at the lowest and highest brightness levels. I sometimes notice it at the lowest level, but it is very minor compared to what it was before I pulled power and battery. I haven't tested middle levels yet.

If your RGBLED display is flickering, and you usually run your machine 24/7 like I do, try pulling all power for a few minutes and see if it solves the problem.

 

I experience the same. There seems to be a sensor behind the screen. One problem of RGBLED screens is the fact that the red, green and blue light sources will degrade at different speeds. I don't know if this problem is solved with newer LEDs, so there could be a sensor that measures the color temperature of the light and adjusts the background light so that it's always white. This might malfunction with too much sunlight.

Do you still have the old laptop? I'd be interested in which panels they have. Could you post the display information of the new and old laptop (if you still have it)? You can find it in device manager, Monitors -> PnP-Monitor, right click -> settings, "details" tab, pick HARDWARE-IDs.

 

hi christoph. sorry, the old one got returned. i just can tell that this one had the same display replaced as it came shipped with.

 

hey, did anyone notice this:

Displays: Dell E1910H Monitor, Driver, Multi OS, Multi Language, Multi System, A00-00
Criticality: Optional
Release Date: 19.05.2009 00:00:00
Description: Initial Release


or actually know what it is good for?

 

where did you find that?? link?

 

Also can't find it in the download section of the M4400, at least.

 

So I had flickering on my WXGA+ LED display. Dell sent me a new one and flickering is gone. It was noticable for example on this LCD monitor tester (inversion) in samples 4a or 4b (depending on screen scrool). Now there is no flickering at all on any sample.

 

Can anybody attest to how portable this sucker actually is? I was looking at the smaller M2400 version but I'm not impressed by some of its benchmarks. More specifically, I would be using this laptop for college with some gaming on the side... does this sound feasible?

 

Hi Kira

Well i for one carry it to work and back daily along with quite a lot of other stuff. It's not exactly the lightest of laptops but i got backpains from carrying my last 17" acer and this one is giving me no troubles at all so i'd say yes, it's pretty portable

btw. You're a hell of a poster getting 5 rep points in 6 posts!!