LP2475W won't wake up after system standby

[steve_mcc]

I have the wake-up problem with my Dell Optiplex 960 (with integrated Intel video) running 64-bit Windows Vista for Business.  I think the DisplayPort implementation on this LP2475w is just plain buggy.  Here's a troubleshooting note telling you to try doing a factory reset to get it to accept the video signal: Advisory: HP LP2475w 24-inch Widescreen LCD Monitor - Display May Remain Blank After Startup If Usin...

[stevemcc]

Actually, now I'm leaning back toward the explanation of the video drivers for the Dell Optiplex 960.  I checked the release notes for the Intel Q45/GMA 4500 drivers, and there are several problems similar to what I was experiencing.  I updated the drivers, but the result is inconclusive.  Some problems, like randomly switching to 800x600 at wake-up, have abated.  However, I still get "No Signal" sometimes.

[stevemcc]

I gave up on the integrated Intel Q45 video in my Dell Optiplex 960 (running 64-bit Vista).  Instead, I bought an NVIDIA card.  It works reliably, with one exception: if the LP2475w is powered off when the system wakes from sleep mode, the system hangs.  The monitor shows "No Signal", I can't log in via Remote Desktop, and the system won't go back to sleep on its own anymore.  I think that's a driver/system issue, not a monitor issue, though.

CURRENT ALMOST-WORKING CONFIGURATION:

   NVIDIA Quadro NVS 295 (PNY VCQ295NVS-X16-PB  low-profile PCIx16 dual DisplayPort add-in card)

   NVIDIA driver 186.18 

[sthielo]

same problem: having a radeon 9800 XT and WinXP ... all updated BIOS, ChipSet, ATI drivers, ....,

but NOT so with a radeon 4800 series Win Vista Ulitmate ... all updated, too.

BOTH systems attached to the SAME LP2475w unit using DVI-DVI. I can switch cables, DVI ports ... it's always the same one whose signal isn't found after switching: the one of the radeon 9800 XT. The other one (4800 series) is always ok.

but I SUCCESSFULLY tried with other monitors, too (e.g. an older HP LP23xx)

I played with ati settings in catalyst. Being clueless I called HP support, who instantly sent a spare part of LP2475w, but it behaves the same odd way: not finding that 9800 XT's signal once switching away and back again or after power safety.

next steps I do:

- I will try the profile switch trick from this forum now.

[Yeahbut]

I too had the wake up from standby problem. Microsoft has addressed this issue (you can search it) and basically said to make sure the modem and mouse are both set up for wake up in Power Management Options.

[Jürgen Strupat]

Recently a had to update the Intel Graphics Accelerator Driver,now the wake up works fine.

DC 7900 with Vista 64 & the onboard Graphic card.

[pverha10]

I use a nettop (fitpc2) with an intel gma500 and have exactly the same problem with the newest intel drivers (2009-12-03). If I use the drivers from compulabs it doesn't have this problem.

[justinmoninger]

I have this problem on a couple HP Z600 running RHEL 5 Desktop with NVIDIA Quadro FX 4800 cards.  I've flashed the latest BIOS to the machine and graphics card and am running the latest 190.53 driver from NVidia.  Anyone have a fix other that resetting the monitor?

[Yeahbut]

I have reached standby after changing my screensaver. 3D jobs are especially prone to trouble.