No signal after sleep

My mac Mini awakes from sleep (I think) but my Viewsonic display shows "no signal".
I cannot see anything in the documents to suggest an adjustment that would help.

Hi Tim,
See if it's related to this...
The 2012 macs (and later apparently) not waking normally from sleep after hours being in sleep. (noted here ...
http://www.xlr8yourmac.com/archives/feb13/022813.html#2012macswontwake
"Why 2012 iMac/2012 Mac Mini won't Wake After Hours of Sleep (Hibernates/Powers Off)")
The sleepimage file still reappears even if never slept. Delete it (hibernate off, etc) - within minutes its back.
A note on that here - http://www.xlr8yourmac.com/feedback/Chameleon_SSD_Optimizer.html
About iMac sleep...
http://forums.macrumors.com/showthread.php?t=1529750
Try this: "sudo pmset autopoweroff 0" and "sudo pmset standby 0"

Similar Messages

Dual Display Problems - No Signal After Sleep

So, I just set up my hexacore Mac Pro with stock ram and the ATi 5870. To go along with it, I purchased two Dell U2311H monitors from Dell so that I could finally have dual displays. I then purchased two 6' minidisplayport to displayport cables from Monoprice. Also went with the Apple wireless keyboard and Magic Mouse.
Upon initial start-up, everything worked fine. The monitors needed to be calibrated, but dual display mode worked perfectly without any extra steps. I had some fun messing around for a little bit and then decided to take a break. I put the computer to sleep.
I came back 15 minutes later (couldn't stay away for long), and clicked the mouse to wake the computer back up. I heard the tower humming, but the monitors stayed black. I tapped the keyboard. Still black. Assuming it was some issue I wasn't prepared for with the wireless peripherals, I futzed around with them for a while and had no luck. Still not image on the monitors. I turned the monitors off and then back on only to get an error message explaining that the monitor was in Power Save mode. Some further exploration revealed that the monitors were allegedly getting NO SIGNAL from the computer.
Restarting didn't help any. The only thing that has "worked" is shutting down the computer and connecting a single monitor through the DVI-D cable that came with it. I can then reconnect the displayport cable and switch the input to re-establish dual displays, but this is obviously pretty annoying. It seems like I can eliminate questions with the monitors themselves or the cables. In doing some research, I've found some threads on different sites about people having similar dual display issues attributed to faulty graphics cards. I certainly hope this isn't the case, but I'm at a loss for what the problem might be. It seems odd that dual displays would work briefly only to fail after going to sleep for 15 minutes.
Sorry if this is the dumbest question ever. Is there something stupid that I'm doing wrong? Anyone have any insight?
Any guidance you guys can provide would be greatly appreciated. Thanks in advance!

I have the exact same issue. Here's the forum I've got going: http://discussions.apple.com/thread.jspa?threadID=2686085&tstart=90
I called AppleCare because this issue was out of the box. Engineering wanted to capture some logger information so I ran the logger and sent it off to them.
I am running a Dell 27" via a DisplayPort to Mini-DisplayPort cable (also purchased through Monoprice) and a Dell 22" via DVI to DVI (have also tried with the DVI to DVI cable connected to an Apple DVI-MiniDisplayPort adapter and the same issue arrises). When I boot the computer with any of these cables, I get no video. Only when I boot with a Dual-Link DVI (DVI-D) cable from the 27" monitor do I get any video on screen. At this point, I can then plug in the DisplayPort to Mini-DisplayPort cable and the regular DVI (not Dual-Link) after unplugging the DVI-D cable and I get video. If I restart the computer, no problem. However, if the computer goes to sleep or if I power down and then power back up, I am back to square one with no video and have to resort to using the Dual-Link DVI cable.
Because this was DOA out of the box, they ended up just RMA'ing the machine and re-ordering my CTO Mac Pro 6-core. Still waiting for it to be built, I'll let you know how it goes on the second machine when it arrives.

No Video Signal After Sleep or Standby

Hi guys. I have a mystery that I'm hoping you have an decent answer to. Sounds like a common problem but mine has a few twists from the issues I've read about.
Whenever my monitor is turned off or goes on standby, the computer stops sending out the video signal. The monitor will not come back on unless I unplug the monitor from the back of the computer for a few minutes or I restart my computer. Sometimes one solution works while the other doesn't and it isnt consistant.
The monitor was tested on another computer and it works well. I bought a graphics card but no difference. I even tried my HDTV plasma (which became an option because of the new graphics card) but that does the same thing.
The computer is an HP Pavilion a6219h running Vista 32 bit home premium with Service Pack 2.
The problem was with the video output that's integrated into the motherboard.
The monitor is a ViewSonic VX2235WM-5 Model VS11349.
Message was "No Signal" on the screen.
I disabled all the sleep features, Set everything to never and saved. Problem still occurs.
I bought and installed an nvidia GEFORCE GT 630 graphics card. Switched from PCI to PCIe in BIOS. Still the same problem.
With this new graphics card, I hooked up the computer to my plasma hdtv via an hdmi hook up. Same problem. No matter what I do, the screen works until it is either turned off or goes on standby.
It still keeps doing it.
At this point I think it must be the motherboard. I've also read online it could be the power supply? What do you think? Is there anything else I can try?
This question was solved.
View Solution.

Hi,
You can download a free application like CPU-Z or Speccy to find your RAM frequency and many other internal features of your computer.
CPU-Z: http://www.cpuid.com/softwares/cpu-z.html
as you said you also installed 2 new RAM's along with Graphic Card,
also check your graphic card drivers... may be they are not set to display when wake up!
Try to download updated software for your graphic card..
Hope this helps
**Clicking on the Kudos! white star is a nice way to say thank you on any post that helped you or resolved the problem.**
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**Selecting "Accept as Solution" for a reply that solves your issue helps others who are searching the web for an answer**

WRT610N v2 - Dropped signal after macbook goes to sleep

Hi there,
My wireless G macbook drops the signal after it wakes from sleep mode. I also have a similar issue with my PC and the WUSB600N but I believe that one is the adapter issue. Can you think of any reasons why this would occur? Troubleshooting?

Is your Mac computer is wired or wireless...?
open the router setup page and Under the Wireless tab,Click on Advanced Wireless Settings..Change the Beacon Interval to 75,Change the Fragmentation Threshold to 2304,Change the RTS Threshold to 2304 and Click on Save Settings... Now,check.
As far as the WUSB600N is concerned,try updating the driver for that.

Screen does not turn on after sleep - ProBook 4530s - Windows 8.1 (64bit)

Hi everyone,
Not sure if this had to be posted in notebook display and video section, or laptop lockups, freezes and hangs. Anyway, I have a problem, where everything is fine with the computer, it's running smoothly, but whenever I make it go to sleep, after it does it instantly, the signals are of a regular laptop sleep - power buton flashing, no other signs of computer being on.
However, the problem appears when turning the computer back on after sleep. After pressing the power button, the computer straight away starts working - you can hear the fan turned on, etc, just that pretty much nothing changes with the screen. Sometimes, with some particular light directed towards the screen, you can even see, that the computer is on (seeing the clock on the display), just like the brightness was set down to 2% or something. And there is nothing that helps from what I have tried to do (tried reinstalling both AMD drivers and Intel HD drivers). I researched this problem extensively but could not find a solution, however, as I have noticed that this is quite an old problem (assuming from the date of the posts this problem first showed up), there might be a solution for it, to which I just have not noticed the answer?
If anyone can help me, please do, the sleep function is essential and extra important function when living on campus at university, I just cannot operate like this.
Hopefully someone will know, thank you in advance.
Dinas

Hi @dindanas,
Your ProBook 4530s is a commercial product and to get your issue more exposure I would suggest posting in the commercial forums. Here is a link to the Commercial Notebook forum.
Please click “Accept as Solution ” if you feel my post solved your issue.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Thank you,
BHK6
I work on behalf of HP

No video after sleep mode.

Brand new home built system (all new components unless noted otherwise) running Windows 7 64-bit Home Premium on the following hardware:
MSI X58 Pro-E motherboard,
Intel Core i7-920 (2.66) CPU,
Enermax PRO82+ 525W powersupply,
Sapphire ATI HD5670 1GB GDDR5 PCI-E video,
8GB Corsair 1333MHz RAM,
WD Velociraptor 150GB 10,000 RPM boot drive,
WD 500GB Caviar Black for file storage,
Plextor DVD-RW,
CoolerMaster case.
Older Viewsonic VP2030B monitor,
Older Microsoft Desktop 6000 V2 keyboard/mouse.
With standard Windows 7 power saving features enabled, the following
intermittent problems occur:
After the system has gone into sleep mode, the video card provides no signal to the monitor. Moving the mouse or touching keys on the keyboard obviously bring the system back out of sleep mode, but no video signal is received. Unplugging the DVI-D
cable from the card results in the Windows sound indicating a change. Plugging it back in, results in a Windows sound indicating the change. This happens when you unplug one end of the cable, it doesn't matter if it is at the monitor end or the video card
end - as long as the other end is of course still plugged in. The only resolution to this "no video" state is to reboot the computer with the power or reset button.
On some occasions when turning the PC on, there is no video signal. The system boots properly (although the BIOS screen takes about 15 seconds to appear - something MSI says is OK), and can be shut down with the correct keyboard sequence. The monitor
runs through VGA, DVI-A and DVI-D, but no signal is ever received so it goes into standby mode.
When the computer boots properly, usually while it is still loading Outlook (which is set to start automatically), the screen goes completely blank for 5 or more seconds, then comes back on and the monitor menu indicates that it is running at the correct
resolution, and then the video works correctly from there on in - unless it goes to sleep.
On some occasions, when recovering from a "no video after sleep mode" incident, everything on the screen has been moved towards the upper left side of the screen. The Outlook window which is normally quite large (80%) and centred on the screen has been reduced
in size to about 50% and shoved into the top left corner. Also, the 4 gadgets that normally run vertically along the right side of the screen have been moved up and towards the middle of the screen, one or two of them often overlap others.
Things I have done/tried:
All Windows 7 updates,
All motherboard BIOS updates,
All video card drivers and software updates from ATI,
Replaced the DVI-D cable,
Uninstalled the video card and drivers, and moved the card to a different PCI-E slot,
Replaced the video card with another Sapphire ATI HD5450 card (temporarily).
Sapphire thinks it's a hardware problem with the original card, but since temporarily replacing it with another card, the problems continue, so I doubt that is the issue. (Plus I have to pay $25 to ship the apparently defective - under warranty card - back
to them.)
These problems have happened intermittently since the system was built in January 2010 and they seem to be quite random, sometimes not happening for weeks, other times happening every few days. Sometimes the system is in sleep mode for 1/2 hour and it happens,
other times it is in sleep mode for hours and it happens (or doesn't).
Any help would be appreciated.

Hi again,
OK, I finally got around to trying this. I still have to check if that actually fixed it, but I managed to get into the "Factory" OSD screen.
I had my system running, disconnected my new monitor and plugged in the flaky old Viewsonic. I then:
1. Depressed and held down the #2 button, then depressed and held down the Power button,
2. Almost immediately the amber power light turned-on, the backlight turned on and the output image from the PC showed up.
3. The On Screen Display (OSD) for all the monitor setting came up (at the bottom of the screen instead of the middle where it normally is), and underneath the Main Menu window in the OSD, along the bottom of the overall OSD window, the word "Factory" appears
in the middle between the control button keys (#1 for exit, and #2 for enter). (It's not normally there.)
4. Using the down arrow key on the face of the monitor, I highlighted the "Factory" menu item, pressed the #2 key and voula! there was a whole new simple white text on bright blue background window, which among all sorts of settings included "Factory Reset"
(which is the default selection).
5. I pressed #2 again to accept and it was done.
All that is left is to do is some user testing to see if the monitor behaves as new.
Additional informtion: in the top of the "Factory" menu it reads: "LOVP AU Ver.0.36"
I took photos of everything and will post them on my Flickr account. To find them go to wwww.flickr.com, click on the search button, then on the next screen click on the People tab, enter my name and click search.
Thanks again for the advice.
Tom

MacPro: How to prevent scanning for monitor after sleep?

Hi everybody,
So here's the deal: When I power up my MacPro or wake it up from sleep, it seems to do a quick search for connected displays and activates only the DVI output(s) which have a monitor connected to them. While I understand that behavior at boot time, I find it really troublesome when waking the MacPro from sleep.
Here's why:
I rarely turn off the MacPro completely, I much rather put it to sleep when I'm away. What I do, however, is to turn off the huge 30'' display that drains a lot of power when left on. When I come back, I just have to turn the display on before turning on the MacPro and everything is fine.
However, there's one scenario where I systematically get caught and that's really... really annoying! It happens in combination with the EyeTV Software. When I'm away by the time a scheduled show starts, the EyeTV wakes up the MacPro and starts recording. That's exactly what it's supposed to do. However, since the monitor is turned off by the time the MacPro wakes up, it won't recognize it and the graphics card won't send any signal! So when I come back to the computer and turn on the screen, It says "No Signal". The solution at this point is putting the MacPro to sleep briefly and resume it with the display turned on this time. However, putting the Mac to sleep while EyeTV is recording a show causes the recording to be rendered useless.
Is there a way to prevent the MacPro from rescanning for monitors after sleep? Or maybe there's a key combination to let it rescan manually?
As far as I remember, it didn't do the rescan-monitors-after-sleep thing under Tiger, but not sure about that...
Any help would be highly appreciated!
MasOS X: 10.5.2 Leopard
Mac Hardware: MacPro Dual-Core Intel Xeon 3GHz (from mid-2007)
Graphics card: NVIDIA GeForce 7300 GT
Monitor: Dell 3008WFP
Greetings,
Mike

What I do, however, is to turn off the huge 30'' display that drains a lot of power when left on.
The display should go to "Active-off mode" (amber power light) when the computer sleeps. This uses less than 2 watts.
<http://support.dell.com/support/edocs/monitors/3008WFP/en/ug/about.htm#Product% 20Features>
If you do want the monitor off (e.g. to save power while EyeTV is recording), you could use a DVI Detective
<http://www.gefen.com/kvm/product.jsp?prod_id=4714>

MacBook Air 11 2014 Wifi Issues After Sleep

I know that people have reported their wifi taking a long time to establish a connection after sleep. I thought I would test my brand new MacBook Air 11 2014 by closing the lid for several hours to see what happens. When I opened the lid, the wifi signal was full and not greyed out like other people have reported. However, my internet was dead. Could not connect to websites or find my iTunes library on my other Mac. In order to get it working again I have to switch the wifi off, then back on again. I'm not 100% sure why I am reporting this as it seems to be a big issue with Mavericks. Its just the majority have reported the wifi logo being greyed out and taking a long time to find its corresponding network.

Hi Daz1761,
This article has information about what you should do if your MacBook Air wakes from sleep and looses wifi connection -
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
Thanks for using Apple Support Communities.
Best,
Brett L

My ipad frequently says "I am not connected to internet" although it is and there is a good signal. after a while it connects regularly. what could be the problem?

my ipad frequently says "I am not connected to internet" although it is and there is a good signal. after a while it connects regularly. what could be the problem?

You can try these things and see if it helps.
Tap Settings, then tap Safari on the left side. Then on the right side - tap clear history, clear cookies, clear cache. Clear all three. Reboot your iPad. Hold down on the sleep button at the top until the red slider appears and slide to power off. Then hold down on the sleep button until the Apple logo appears and the iPad will restart. Launch Safari and see if helped.
If that doesn't help, try this. Tap Settings, then tap General on the left side, then scroll down on the right side and tap Reset, then tap Reset Network Settings at the top. Reboot your iPad as described above. Launch Safari and log on to the Internet. You may have to enter your network password again when you reset Network Settings.
Renew the Lease in WiFi by going to Settings>WiFi>Network Name>Renew Lease. Reboot your iPad and try Safari again.

Mac Mini 2014 Oct cannot wake up after sleep

Mac Mini 2014 Oct Version, cannot wake up after sleep by typing on keyboard or moving mouse (both hardwired USB) if external HDMI screen goes to sleep mode too (usually after 1 min if no signal coming from the MAC). To wake up, I ust turn off and turn on the screen and keep typing on the keyboard. I already checked "prevent computer from sleeping if display goes to sleep". But does not help. This is very annoying. I now try to set the sleep timer to more than 1 hour. Wasting my energy and not helping. I tried connecting my HDMI screen to a HDMI to mini-Display port adaptor cable, then plug into the thunderbolt port of the MAC. Same issue, no improvement.

I may know whats going on with the wake from sleep issue. I have a Mac Mini 2012 but this fix (see below) should work on any product running 10.8.2 Mine is at 10.10.1 and it worked.   First off you can tell if your Mac Mini is in sleep mode by looking at the small light on the front of the Mini. If its pulsing... going from bright to dim its in sleep mode. If you put your Mac in sleep mode, or it goes into sleep mode it will wake from sleep BUT ONLY for the first 4 hours. After 4 hours it will go into what is known as "safe sleep". The light on the front will be off and you won't be able to wake your Mac. The only way to wake the Mac when in safe sleep is to hit the power button and then wait a minute or longer as your system will need to pull the data from the disk and load to ram. This is causing the issue where its not waking from sleep. You can move your mouse or hit the keys all you want but it won't wake from sleep. This is a real pain as you have to press the power button on the back of the Mac mini and wait for the system to come out of its slumber.   Here's what Apple says:
With the release of the OS X Mountain Lion v10.8.2 supplemental update 2.0, a new feature was introduced to enter safe sleep after four hours of the computer being connected to AC power. This is an effort to comply with the European Energy Standards (ErP Lot6). This will only occur if there is no wireless or Ethernet activity and no activity from external devices such as USB storage devices. This is normal behavior for the following models:
MacBook Pro (Mid 2012 and later)
MacBook Pro (Retina, Mid 2012 and later)
MacBook Air (Mid 2012 and later)
iMac (Late 2012 and later)
Mac mini (Late 2012 and later)
I have found a fix that puts an end to this nonsense..... Go to the Mac terminal (Google if you don't know how or youtube) and run the following commands (Very easy to do and if a novice like my self can do you can for sure)
1. When in the terminal mode type:
pmset -g          This will show your current configuration of your sleep, hibernate, etc You may want to print so you can restore these values if needed.
2. Change your standbydelay to 86400    86400 is number of seconds which is 24 hours. Here’s the command:
sudo pmset -a standbydelay 86400
3. Change autopoweroffdelay to 86400 Here’s the command:
sudo pmset -a autopoweroffdelay 86400
4. At last but not least change autopoweroff to 0   Here’s the command:
sudo pmset -a autopoweroff 0
Run pmset -g to verify your setting have changed. I rebooted my system and checked again to make sure. Since I made the changes no more going into Safe sleep!!! You can change the values to what you like. I used 86400 secs. (24 hours) I hope this helps!

Cannot auto-connect to wi-fi after sleep

I'm having troubles to reconnect to wi-fi once iPhone 3G goes to sleep mode (once auto-lock is activated when not being used for 1 minute).
This started to happen after 2.1 update.
My son's iPhone 3G which is still running version 2 firmware does not suffer from this.
We have a Belkin wi-fi router in house and when connected the signal strength is full all around the house, but whenever I "wake-up" my iPhone from Sleep mode, it instantly connects to 3G and never auto-connects to wi-fi (even when I'm standing next to the router). It can see and finds the router (under wi-fi settings) but is refusing to connect to it even when I select it.
I have to force this by switching on and off the airplane mode, then it reconnects to wi-fi instantly with full strength.
This useless excercise is so frustrating, especially considering that local provider Telstra is charging $2 per MB for casual use
of data on their 3G network and my iPhone is just happily eating up costly 3G bandwidth when I have a 4 mbits/sec internet connection over home wi-fi network.
Anybody else noticed this after 2.1 upgrade ?
Router is configured for WEP encryption, I've already rebooted my iPhone and the router.
Cheers

I noticed that it takes a few seconds longer to reconnect to wi-fi after sleep, but it has consistently connected.

2 x Apple TV 3 units purchased late 2013 both dropping WiFi or performing terribly after sleeping

Hello,
I purchased these 2 apple TV units separately. One of them was purchased from the Apple store in July 2013 and the other in September 2013. They operate perfectly when I used a wired connection but when I use WiFi they both drop the connection randomly and perform terribly (unusable) when coming out of sleep. When the Apple TV's are rebooted they work well again but I shouldn't have to restart them every time I want to use them after they've been sleeping.
The WiFi AP I use is a D-Link DAP-2310. In addition to running the AP as 802.11b/g/n I've tried to configure it as 802.11b only, 802.11b/g only and 802.11n only. This makes no difference with the performance other than in 802.11b only it's just slow all the time of course. While configured as 802.11b/g only I turned off WMM but this made no difference. The network performance was absolutely terrible (unusable) after they were sleeping as usual. AFAIK with 802.11n WMM is always on since the option is greyed out and set to "yes" when 802.11n only mode is set.
My wife's PC uses WiFi and has no problems (continuously using 802.11n). My MacBook Air uses 802.11n continuously with no down-grade to a lower 802.11 mode and has no problems. I've ensured my WiFi channel is not being used by any other visible SSID around my house. I am using channel 3 and no one else is.
I heard about an Apple TV 3 replacement program and originally the serial numbers that had the problem matched my unit but apparently Apple had the positions of the letters wrong and my Apple TV's no longer qualify for this replacement program. (See https://discussions.apple.com/message/21802730#21802730 for more info on that)
Not sure what my next move should be.

Hi vazandrew,
Thanks for replying. I downloaded iStumbler but it pretty much does the same thing as the WiFi diagnostics tools built into OSX (some information http://osxdaily.com/2012/07/31/wi-fi-scanner-mac-os-x-mountain-lion/).
I used the WiFi diagnostics tools to make sure the signal was good in the rooms where the Apple TV 3 units and also made sure nothing else was using the same channel. It's possible, although not likely because I live in a fairly rural area, that someone has a non-broadcasted SSID on the same channel as me. I don't think that's the case though.
I did switch channels a few times over the course of 3-4 days last week but that didn't make any difference in the performance after sleep on the ATV3 units. I also changed from 40MHz to 20Mhz channel width as well. These changes made no difference. The ATV3 units still had terrible and unsuable network performance until they were restarted. A power cycle is not necessary though - just a restart.
I've had the DLink AP for just around a year. My previous WiFi router died so I stepped up to a Cisco RV042G and a DLink AP so if my WiFi bridge died I'd just be replacing the AP instead of a whole router.
Since the problem is with both ATV3 units its either both of them because they are similar production times *OR* the AP itself. Since I have absolutely no problems with WiFi on my laptop or my wive's PC though that kind of leaves the ATV3 units as being misbehaving.
Maybe I'll just have to spend a few bucks on some cabling and a small switch and put wired ethernet on these suckers.

HP SimplePass Reader Does not Work after Sleep

I have only had my laptop for a week - the fingerprint reader stopped working 2 days after I bought it. I have tried everything: removing and re-installing various drivers and software, stopping and starting Credentials Manager, unchecking the box that allows the computer to turn the reader off to save power, etc.
I have gotten it to the point where it functions when the computer is logged in, but not after sleep. It works once if you restart the computer, but after waking it from sleep it does not initialize. (no light or anything) However, if you "lock" the desktop from the start menu, the reader will log it in again. (without closing the lid or putting it to sleep)
Simple Pass version 6.0 (latest downloaded from HP.com)
Envy Dv6 7229wm
Windows 8 64-bit
Thanks

Hello hawvi,
I see that you are having problems with the fingerprint reader not working after returning from sleep mode. I would like to help with this issue but I need some information.
Can you provide the full model and product number of the computer? Here is a link that shows how to find that information.
What operating system are you using?
How long have you had the problem?
↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

X1 Carbon Touch Screen stops responding after sleep

Hi,
My X1 Screen does not come back after sleep for several minutes. I've encountered this problem the very fist day I've received it, a reboot solved the problem but after few days it happened again, this time it took 2-3 hours for it to come back after several reboots. After a week it was gone for good, Service replaced the motherboard and just received my X1 back yesterday. Today it happened again. A reboot solved the problem but symptoms are same. Comp goes to sleep, when I try wake it up, X1 works but diplay is totaly gone. I can hear the sounds, see the fingerprint sensor etc is alive but can not wake up the display..
Model is 208A and Win 8.1
Any ideas ?
Thanks

Hey...got your back on this one! I returned a T440s because of this.....tech support had no idea...same problem for the replacement they sent to me, and again they it's a motherboard issue. Nope....trial and error...found the solution. Download and upgrade your fingerprint pro software and it's fixed. Here is the link. Please post if it worked for you too!
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS031504

HT4279 ATI Radeon HD 5870 screen resets size after after sleeping. Why?

Purchased an ATI Radeon HD 5870. When connected to 1920x1080 it leaves a third of the screen out. However after starting up it fits the screen. Only after sleeping does it reset to this faulty screen size. I have attempted every Mini dv adapter vga,dvi and hdmi. All lead to the same issue or another.
Is this card defective? Is this an issue with the Lion OS?

Ok let me go into more detail for you.
Macpro had 2 Geforce gt 120 video cards. I recently had some blocking issues ( where the screen just over lays a bounch of boxes with random parts of the background and or aps running). Decided to upgrade to the Radeon 5870. Before the upgrade i have been using a Samsung LCD tv and and old Dell monitor. Worked great. Tv res was set to 1920x1080. Instailed the new card. Hooked up the Dell to the DVI output and Tv to a Mini DV at first using the Mini DV to DVI. Ended up with the half the screen issue. Took the back and got the Mini DV to HDMI. I didnt have the size issue but when set to 1080 it was not hidef. Took that back and got the Mini DV to VGA. Now here is where I currently am stuck. When both the TV (Mini to VGA) and the Dell (VGA to DVI) are connected to the 5870 and the harddrive and monitors go to sleep it resets and i lose an 8th of the screen. I currently am just using the TV and everything seems to be fine. Also on the amount i lose there is a dotted line that some times flickers. Not sure if that means anything.

No signal after sleep

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