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Xandertje
Copper

Monitor won't wake up - Displayport - ATI Radeon 3470

After my computer goes to sleep, I can't get the monitor to wake up again about 80% of the time. I just have to do a hard reset.

I can connect via remote desktop without any problem.

I have tried pressing keys on the keyboard and moving the mouse to no avail. If I turn the screen off and on, it just says 'entering power saving mode'.

Configuration:

OPTIPLEX 960 MT - Bios version 3
256MB ATI Radeon 3470 PCIe
2408WFP
DisplayPort

I tend to think that it is DisplayPort related. I never had this issue before using other computer-monitor combinations and DVI.

I tried installing the newest BIOS on the computer and installing the newest ATI driver. No change.

Any ideas?

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54 Replies
Moderator
Moderator

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

Early revisions of the 2408WFP had trouble recovering from sleep state with some graphics cards. This issue was due to a delay setting in the firmware. This delay setting has been changed from 150 ms to 250 ms to resolve this issue. What revision do you have?

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Xandertje
Copper

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I have Rev. A01. That would seem to be the first one. Is there a fix? Can we change the delay ourselves through the menu? Is there a firmware update available? Is it even possible to update the firmware of a monitor?

May I hope for a response within a month this time?

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Moderator
Moderator

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I have Rev. A01. That would seem to be the first one. Is there a fix?
* Get it exchanged.
 
Can we change the delay ourselves through the menu?
* No.

Is there a firmware update available?
* No.

Is it even possible to update the firmware of a monitor?
* No.

May I hope for a response within a month this time?
* Nice.

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steve_mcc
Bronze

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I'm having the same/similar symptoms on my new Optiplex 960 with DisplayPort video, but I'm using a HP LP2475w monitor.

If the machine sits idle for a while, sometimes the display will not wake up (i.e. No Signal).  Plugging the DP cable in and out will not wake it up either.  I recently tried setting the "Put computer to sleep" to "never", but that did not fix the problem.

In one instance the power button wouldn't even respond, and I had to unplug the power cord to reset the machine.  Another odd symptom is that the hard drive light will stop flashing, whereas it typically flashes intermittently when the computer is idle.

All of this makes me think that there is a problem with the computer's power management, not the LCD display.

 

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steve_mcc
Bronze

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I'm having the same/similar symptoms on my new Optiplex 960 with DisplayPort video, but I'm using a HP LP2475w monitor.

Note that I have integrated Intel video, not a card.

I did find an interesting error using the boot Diagnostics:

5300:021C  VIDEO -- detected a problem with retrace status

The error only occurs with the DisplayPort output; all the tests pass if I use VGA.

However, I also discovered several HP advisories on the LP2475w warning that the monitor may not recognize DisplayPort video in some circumstances.  Therefore I now think that the LP2475w is the likely root of my problems.

It's a very annoying problem -- hard to reproduce, with a basket of symptoms that don't seem to occur together consistently.

 

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steve_mcc
Bronze

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I'm making some progress.  Now I think it may be a video driver problem.  For anyone with similar symptoms, see: http://en.community.dell.com/forums/t/19279098.aspx

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Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I have a 2408WFP revison A02 and still have this same issue. My graphics card is ATI Radeon 9550. I am using two monitors the monitor connected to the VGA port wakes like normal only the 2408WFP (DVI) stays asleep. I worked around the issue temporarily by keying a hot key to switch displays it worked 60% of the time waking the 2408wfp. It seems to be an ATI problem. Your thoughts Chris?

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Moderator
Moderator

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

All of these Powersave/wake issues seem to derive from the video card driver or the card itself. Some cards work while others do not. My advice is to use these links to load the latest video card driver. If the video cards are non-Dell, then contact the manufacturers website and look for flash bios updates.

Ati Driver Instructions

Nvidia Driver Instructions

Some Ati video card users have had success using the Ati Tray Tools -
* Install ATI Tray Tools and see if a Hot Key combination will wake it up
* Menu- Hot Keys- Enable Hot Keys (make sure it is checked)
* Menu- Hot Keys- Customize
* Add new Hot Key
* Miscellaneous- Reload display driver
* Assign a Hot Key (I used ALT + T) - Ok
* Now, every time your monitor goes into power save mode you can revive it by pressing ALT + T (you can use any keys you want of course). This also works if you have completely powered off your 2408WFP with the button on the monitor

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desmet
Bronze

Re: Monitor won't wake up - Displayport - ATI Radeon 3470

I am experiencing very similar behaviour with the following configuration:

OPTIPLEX 960 MT - Bios version 4
256MB ATI Radeon 3470 PCIe
Dell U2410 (great monitor by the way!)
DisplayPort or DVI via DP-DVI cable

In the beginning the problem also occurred 80% of the time.

I have updated the ATI drivers to 9.8 and unchecked "require password when leaving sleep mode" . Since then, it has dropped to 10% of the time. Still too much ...

Defining a shortcut key in Catalyst Control Center does not help.  I tried with "restore optimal settings" and "swap displays". However none of these has any effect once the monitor refuses to wake up. I still have to try with ATI traytools and "reload driver"

 

Now some things that may be helpful for other people:

1) My workaround is to press the power button to let the PC go to sleep again. Then wake it up again and most of the time, the monitor will wake up the second time. Costs a lot of time, though.

2) Once, after trying the "restore optimal settings" shortcut (without success), followed by the resleep - rewake procedure, I saw an ATI error message saying:

"The system has detected a link failure and cannot set the requested resolution and refresh rate on your DisplayPortTM display. Your display might not support the requested resolution or there may be an issue with the cable connecting the display to your computer."

 

This might be an indication of the cause of the trouble. ATI card malfunction? Still bad drivers? I doubt this could really be a cable issue...

 

 

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