Clamshell mode & possible battery issues

Hello everyone!
I just started using my MacBook Air in closed «Clamshell» mode. I bought my MacBook in October and since I got it I read all the advice on how to ameliorate battery performance. I also read that keeping the computer plugged in all the time could damage the battery. As I also noticed, Clamshell mode won't work unless the computer is plugged in continuously (once, I took off the cable and my ext monitor stopped).
So my question lies to these facts; my workflow obliges me to use Clamshell for the most percent of the time (I type and can't use the laptop's keyboard all the time); laptop is needed to be on charge all time; won't this ruin my battery's life?
Thank you in advance!

Apple strongly recommends that you not use the computer plugged in all the time, true. But if you just make sure to use it on battery a couple times a month you'll be okay. Long ago I set a calendar event for one Friday evening a month. It reminds me I need to use the computer on battery during the weekend. My 2009 MBA is now 6 years old with its original battery! which is still getting just above 80% of the full charge it did when it was new. It has just slightly more than 400 cycles which clearly shows that it was used more on power than battery.

Similar Messages

New Macbook Air - Possible Battery Issues?

Is it normal for my new 2013 macbook air to lose a tremendous amount of power overnight when it is sleeping? When I put it to sleep at night with over 50% remaining on the battery, the charge is usually about 10% in the morning. Sometimes the device is extrememly warm as well.
I did change the sleep settings so that it does not save the info on my RAM to my SSD and locked the sleep image file to prevent the computer from using it. Is that a possible reason for the battery issues?

I "fixed" it by reverting my sleep settings back to default hibernate mode 3, which means that every time I put the computer to sleep it will save my RAM to the SSD via the sleepimage file.
As of changing that setting back, my Air has been been sleeping properly (I think).
I didn't find a solution where I could prevent the sleepimage file from being created/used every time I put the computer to sleep and still get the Air to sleep properly.
I think what was originally happening was that because I locked the sleepimage file, the computer spent the entire time it was suppose to be sleeping trying to access the sleepimage file - causing an enormous amount of battery drainage over time.

Wifi signal in clamshell mode with Airport Express

Hi
I'm planning on buying an Airport Express but I'm using my Macbook Pro 2009 in clamshell mode connected to an external monitor.
Will the signal with the lid closed be as good as with an open lid?
Apple doesn't mention anything concerning wifi signal in clamshell mode.
I really wouldn't want to use it with and open lid.
Thanks in advance
Jimmy

Running it once a week on battery is enough?
You could unplug the AC and the external display from it once a week, run the battery down to nothing, and recharge it all the way. But that wouldn't be ideal, because deep discharges like that are much harder on the battery than partial discharges. Using the machine on battery power for an hour or two every day or two, with those partial discharges and recharges adding up to about a cycle per week, is easier on the battery.
Shouldn't there be a way to tell the macbook to run on current only?
If you mean on AC power only, there's no need to tell it to do that. It does that without being told, whenever the AC power adapter is connected and the machine isn't drawing more power than the AC adapter can provide. On the very rare occasions when you are working the machine so hard that it draws more power than the adapter can supply, it draws the necessary additional power from the battery without being told to do so.
The issue is that if the battery is never used (which might very well be true if the MBP were always kept in clamshell mode), the battery deteriorates much faster than it would if it got regular light exercise. If you don't really need a portable computer and are just interested in minimizing the footprint of a computer on your desk, consider getting an iMac or a Mac Mini instead of the MBP. You'll save a lot of money and have no battery to worry about.
For the most complete summary of useful MBP battery-related information available anywhere, read this outstanding User Tip:
http://discussions.apple.com/thread.jspa?threadID=1764220

HT3131 Are there any ventilation issues with running a macbook air in clamshell mode?

Are there any ventilation issues with running a macbook air in clamshell mode?

...that makes sense to me.
but, why do so many MBA users (on this forum and others) claim that ventilation occurs through the keyboard? Is this claim based on an old macbook design?
for example, here's a related discussion (although fairly old):
11-08-2010, 12:16 PM
#6 (permalink)
SP Forsythe
Notebook Evangelist
Join Date: Jul 2007
Location: California
Posts: 660
Rep Power: 14
Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
Quote:
Originally Posted by tHE j0KER
Actually I you shouldn't close the lid while running on an external screen. The keyboard of the Macbook is an air intake for the fan. Close the lid, and it could overheat.
A common misconception of unknown origin. The intake and the exhaust for the cooling fan on the 13" MB and MBP are both located on the rear slot at the base of the hinge. In fact, you can actually see the divider that separates the intake flow from the output flow. If it were through the keyboard crevices, then an awful lot of overheats would result from people using impermeable keyboard covers, as well as Apple's warranty department would be flipping out over the Apple store carrying such covers. iSkin ProTouch FX Keyboard Cover for all MacBooks - Black Printed Keys on White - Apple Store (U.S.)
Does one think that Apple sells these only for use when the Notebook is off??? http://store.apple.com/us/product/TW...co=MTM3OTUwMDE Closing the lid, whilst operating the unit actually results in cooler operation due to reduction in power consumed by operating the display, which in supporting the on-board display generates heat far greater than simply powering the video port..
Does one think that Apple sells these for use only when the MacBook is off? http://store.apple.com/us/product/TW...co=MTM3OTUwMDEApples direction for use is specifically for when using with an external display.
Currently using:
Apple MacBook Air 13" mid 2011 1.8GHz Core i7 4GB 256 GB SSD Lion & Ubuntu Linux via Fusion
MacBook Air 11.6" late 2010 1.6 GHZ, 320M, 4GB 180 GB SSD Upgraded OWC), OS X Lion
11-08-2010, 02:34 PM
#7 (permalink)
ajreynol
Notebook Virtuoso
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,542
Rep Power: 18
Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
once again, I've tried a few of these keyboard covers. the Moshi keyboard cover is the ONLY one I can recommend. the others are too thick or change the keyboard experience too much.
17" Apple MacBook Pro | i7 2720m | 160GB SSD + 750GB | 16GB | HD 6750M 1GB
Dell 435MT | i7 920 | 10GB RAM | 7.64TB HDDs | HD 6970 | Win7+SL
HP Elitebook 2710p Tablet PC | 1.8GHz C2D | 4GB RAM | 160GB HDD | X3100
Apple iPhone 4 32GB | Apple iPad 64GB (Gen 3)
Stop random laptop wakeup | 5K500.B bench data | How to Disable PowerMiser
Disable Vaio beep when pressing volume or special keys
11-08-2010, 03:34 PM
#8 (permalink)
doh123
Without ME its just AWESO
Join Date: Feb 2009
Posts: 3,282
Rep Power: 22
Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
1. Closing the cover will cause more heat. This is not because of covering the keyboard very much (though it does help some heat be retained). It's mainly because of the shape of the hinge and the fact when closed it covers up the back vent a lot more. For the best cooling, it is best to have the screen open. Just run it as a dual monitor, but make the external the Primary monitor, and if you don't want to use the built in, just turn its backlight off and don't use it.
2. The thing you plug into the wall is not a battery charger. The actual "charger" is built into the computer. It knows when to charge and when not to. If the little light on the power plug is amber, then its charging your battery. When its green, its just powering the laptop and NOT charging your battery at all.
Mac OS X Gamer/Porter
(We do exist!)
Wineskin 2.5 is available!. Turn Windows apps into Mac apps for free!
11-08-2010, 03:38 PM
#9 (permalink)
Wolfpup
Notebook Virtuoso
Join Date: Jun 2007
Posts: 3,871
Rep Power: 28
Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
I'd leave the lid open, at least partially...yes it may be fine not doing that, but you are making heat dissipate worse, of course could even theoretically hurt the screen.
As for the battery...well there's really only two choices, have it plugged in or not. As others mentioned, you can't overcharge the battery. It can be damaged a bit from heat, but of course the number one thing that's going to damage it is discharging it...so it's a no brainer-use it plugged in whenever possible, and try to charge it whenever possible when it's not plugged in.
11-08-2010, 03:45 PM
#10 (permalink)
SP Forsythe
Notebook Evangelist
Join Date: Jul 2007
Location: California
Posts: 660
Rep Power: 14
Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
Quote:
Originally Posted by doh123
1. Closing the cover will cause more heat. This is not because of covering the keyboard very much (though it does help some heat be retained). It's mainly because of the shape of the hinge and the fact when closed it covers up the back vent a lot more. For the best cooling, it is best to have the screen open. Just run it as a dual monitor, but make the external the Primary monitor, and if you don't want to use the built in, just turn its backlight off and don't use it.
Nope. Apple would disagree with you on that one. Any "closure", which is, when compared to the amount of CFM, is insignificant. In fact, the opening size remains the same. it is only deflected at a slight angle when the lid is closed. Tilt your MBP and see. As well, shutting down the display lowers the heat being generated, even in the lower case. As I said, if it were a problem, Apple would not be selling stands designed to operate your unit in the closed position as the original poster of this thread proposes to do.
Currently using:
Apple MacBook Air 13" mid 2011 1.8GHz Core i7 4GB 256 GB SSD Lion & Ubuntu Linux via Fusion
MacBook Air 11.6" late 2010 1.6 GHZ, 320M, 4GB 180 GB SSD Upgraded OWC), OS X Lion

Possible cure for battery issues

hi
first of all i dont own the device yet
i am user of 5530,5800,n8,c7,701
i was looking farword to bring in my hands the first nokia wp7 but due to features missing and (in my opinion) little overpriced at the moment(as sim free) i will wait for the next nokia wp7
but being for a while in nokia forums i deside to write this atricle with my opinion about the battery issue (IF IT IS) with the 800
after reading many users facing problem with battery in different revious and forums about my N9 last longer or my N8 etc i deside to do a test with my current in use 701(1300milliamber battery and the brightness screen that nokia offers right now)
i left all day the phone connected to 3g and gprs data with about 5 min calls couple of textsand little browsing fmobi,little use the default browser,little use apps which connects to internet ...all these for about 1,5 - 2 hrs
it did last about 12 hrs same as some users with the lumia
Now if you dont belive me TRY THE SAME TEST BY YOUR SELFS
what i have understand (as i dont own the device) is that perhaps by default or out of the box (and especially the branded phones from the providers) is that featurs like wifi or data, nokia account, market place bing etc must be ON
if was the same issue with my 701 it will not go too far of course
what nokia possible can do is to do a frimware update which in start up or rebooting the phone....dark them,wifi,data,bluetooth,internet connection should be off by default like in symbian
i am sure the upcoming new customers will not have future complains
but i belive this is important as some poeple dont have the knowlege to do all these to turn off manual, especially in a new UI that they are using first time (wp7) and of course having a new phone most of them especially the non experts can think the battery drains so easy if all are ON
******* or at least nokia should make it like symbian to turn off automatic after closing apps,face,twitter,email etc
thanks for your time reading
for me after my Xmas bonus(if any lol) i will go for a windows phone(sim unlocked)either if nokia or other brand
of course i can wait for the next nokia model not because of the battery issue but i prefer in windows phone 7 bigger screen
thanks again

I must agree with your thinking...
When I first got my C7, battery wasn't lasting a day...
And the reasons was the ones you said...
e-mail was keeping data on, WiFi was always looking for a connexion
I won't say that the Lumia 800 can't have any battery issues, but first of all, it's our use that kill off the bettery...
Setting e-mil to work only once per hour, setting WiFi off when not used...
Only those 2 option give a bette life to the battery...

10.5.3: Clamshell mode and 1080p display issues fixed?

Has the clamshell mode issue and 1080p display issue been fixed in 10.5.3? Are you able to shut your laptop and use 1080p on an external monitor without the **** thing freaking out?

Me and hundreds like had the issue when we upgraded to 10.5.2. It is a known but bug that when you start up the system an external display wouldn't be recognized in calibrated profiles (only at 1440x900). A work around was to start up then close the door immediately or boot up without external display connected and connect when completed booted.
I was told by support in Jan that there would be a fix in the next release (10.5.3 I presumed), but after installing it I have the same problem and the release notes don't mention it as repaired.

Macbook Pro clamshell mode issues!

Hi All
I have a 15inch late 2011 i7 MBP running Lion, I'm using it like a mini desktop on a stand/closed &
hooked upto a DELL 2408WFP monitor.
Problem is, behaviour is eratic especially after waking from sleep. Desktop image will have reverted to plain grey, windows
will shift position etc etc & worst case it wont wake to the external moitor or just hang!
Anyone else having the same kind of problems or miracle cure ??????
After upgrading from an old G4 mirror door running Tiger which all ran super smooth, my experience with everything
new has been terrible! Lion seems more like a Skunk !!
Cheers
Saul

Anyway I don't see how this is relevant to my current predicament.
If you intend to use the MBP as a portable computer on occasion, running it on battery power when you do, you won't need to worry about your original strident objection to the AC power requirement for clamshell mode:
There is no denying that this will ruin the battery life on my MBP because it will remain plugged in 24x7.
Of course if the machine were to remain plugged in all the time, it wouldn't make the slightest difference to you if its battery was ruined. You'd never need the battery.
So use it in clamshell mode most of the time, and once a month, unplug it, run the battery down and recalibrate it. You will be within the letter of Apple's advice on managing the battery, and you'll have nothing to worry about. It's only if you can't manage this minimal inconvenience that you'll have to regret your decision to buy a MBP instead of a Mini.
An anti-sleep hack won't turn off the built-in display when it's closed, as clamshell mode does, and it may prevent the machine from going to sleep for its own protection if it ever overheats, which is more likely with the display closed than open.
Message was edited by: eww

Clamshell mode + battery power = repeated sleep

I've got an odd one. My 2009 MacBook Pro (15") running 10.6.7 sits on a cooling pad plugged into a powered USB hub. I'm using a 21 inch LCD to run in clamshell mode, and it works fine with the lid down or up when it is plugged into the AC power adapter.
But unplugging the adapter causes the Mac to fall asleep about 10 seconds after unplugging. A keystroke or mouse click reawakens it -- for about 10 more seconds, then off to sleep it goes again. This repeats over and over. It seems to happen mostly when the lid to the Mac is closed, when the lid is open, not so much. Is this due to heat or what? Obviously the built in LCD has much different resolution than the external monitor, so I pretty much have to awaken it with the lid closed.

AC power is required when using clamshell mode. See http://support.apple.com/kb/HT3131.

Semi-Scientific Test on iPhone 4S Battery Issue w/two iPhone 4Ss

All,
My wife and I ordered identical 16 GB iPhone 4Ss. They were set up the same way. From the very start, I could tell that her battery was outperforming mine.
After a day of turning off and on various settings, from Location Services, to Siri, to iTunes settings, etc. I still noticed a huge gap in stand-by performance. I was losing 1% per 10 minutes, her phone was not.
Today, we had similiar usage with similar network characteristics (WiFi, decent 3G coverage) starting from a full charge (100%). After 8 hours, her phone still had 52% remaining. Mine died on the way home from work.
So tonight, I performed a test. I plugged both phones up and allowed them to fully charge to 100%. While plugged up, I ensured each setting on the phone were identical, including the number of Exchange accounts, brightness level, etc. At 9pm CDT, I unplugged them. My phone took a long time to get from 99% to 100%, her phone didn't. Mine also went to 99% upon unplug, her's didn't.
Neither phone was used at all, stayed completely in stand-by mode. At 10:15pm CDT, ...her phone remains at 100%. Mine is now at 92%. That's roughly 1% every 10 minutes on my phone, same thing I saw earlier in the day.
I think this, for me at least, confirms the diverse results folks are seeing. Some folks are seeing major battery issues, some are seeing better battery life over other iOS devices. It just so happens in our house, we have one of each. Why would two identical phones behave so differently? I've exahusted all possible options on my phone, including the recently posted attempt at deleting e-mail accounts and resetting network settings.
Does Apple recommend that I do a restore on my phone? I am trying to do so, but I am having issues re-downloading iOS 5. If I still see the same battery drain, I believe I will take this into the Genius bar.
I do believe it's time that Apple address this battery issue. I for one, based on experience, believe it's real, and could be a manufacturing defect. I don't know how else to explain two identical phones having vastly different stand-by results if my restore fails to fix the issue.

After spending 2 days troubleshooting I have found my battery drain culprit. When I turn my wifi on it coninuously disconnects and reconnects to my network. This was draining my battery about 1% every 4 minutes. I went through all the turn this stuff off, reset network settings, setup phone as new, helped some but still had the issue. This morning I set mine and my wife's up the same, she went to work and was playing music on the way in. Still had 100% after 40 minutes. I was at home with wifi on and dropped to 90%.
I charged my battery back up, turned wifi off and now after an hour still have 100%. This is with siri on, icloud on, notifications on, etc.
Can anyone else confirn this is an issue for them. I am trying to determine if it is hardware or software related.
Thanks

Does Clamshell mode run slower for you?

I've seen people asking questions regarding mighty mice in clamshell mode and then noticing a difference in mouse performance when in open display mode, but thats not my issue. I have a 2011 13" 2.3ghz i5 MBP and using it in clamshell mode. i have a small app running in the background called ifreemem that shows how much ram is being used and right now with only itunes and safari (to write this) open, I'm showing 75% of ram usage of my stock 4gb. Granted, I'll soon be updating to 8gb, but I'm just wondering if this is normal. I'm using a mini dvi adapter to connect to my 19" LG LCD TV/Monitor. Any comments are appreciated.

To help with heating, place the MBP in the bookarc upside down, so that the fan vents (at the display's hinge) are facing up. This will help to avoid internal heat buildup towards the battery and HDD. Sure, the exterior apple logo will also be upside down as it stands, but it's also not light up and small price to pay for peace of mind.
Most of the heat from CPU intensive apps should be at the bottom case, towards the top side (hinge), and at the vents along the screen's hinge (from the fans), so less heat on the display itself through the keyboard. The heat will also go right out from the top of the MBP in this case, and not out from the bottom (if MBP is placed with apple logo right side up), which will help to keep the MBP cool in general.

Mid-2010 MacBook Pro stuck in clamshell mode?

I asked a similar question to this earlier, but now the problem has been more consistent. I have a mid-2010 MacBook Pro that I often use with an external display, plugged in via mini-DVI to HDMI adapter. The problem is, after I've unplugged my macbook to "go mobile" and am away from my display, if I ever have to restart my computer or boot into Windows 7, my computer will think it's still in clamshell mode. The screen will stay dark, and if the lid is closed, the white light will stay on steadily, not pulsing. However, if I plug into my external display when this is happening, the external display works fine and I have a display again. When I look up my displays while connected to an external display while this is happening, my internal display isn't even listed in the system report; it's like it doesn't exist! And this is especially a problem now as I am away on a 3 week school related trip.
I have not been able to consistently reproduce this problem. Sometimes it restarts normally, sometimes I restart it and get the gray + apple logo screen that then goes dark, and sometimes the internal display just never turns on. The problem doesn't seem to be related to an OS, as it happens when booting into Windows 7 OR mountain lion 10.8.5. I've tried resetting PRAM mutliple times as well as performing an SMC reset multiple times, and neither has helped. This even happened when I was booting into a mountain lion install USB, as I thought maybe a fresh install would help. I've seen many other forums discussing a similar issue, but none described quite like mine.
What gives?? How can I get my macbook to restart normally? I really don't want to have to make a repair, even though it's looking like a hardware problem. My computer is one month after Apple Care has expired, and I can't afford a pricey repair as I'm a very in debt student who only has a MacBook because his school gave it to him in the first place. I would be very appreciative for any suggestions and/or help! Thanks!

Hello thedoctor8706
Reset your NVRAM and test to see if that resolves your issues. Typically that will resolve video, volume, startup disk selection, and kernel panic issues.
About NVRAM and PRAM
http://support.apple.com/kb/HT1379
Thanks for using Apple Support Communities.
Regards,
-Norm G.

MacBook late 2008 - stuck in clamshell mode

This laptop was recently attached to an external display and all was fine - running in either mirror or non-mirror mode. When I last saw it it was set to mirror mode and the lid closed to effect "clamshell" mode.
Recently however it has got into a state where the built-in screen display is not recognised. The external display is OK. If the external display is disconnected the MacBook will go to sleep regardless of the lid being open or pressing keys etc.
On a reboot the laptop screen will show everything OK up until a few seconds after completeing the login phase - then it goes black.
There is a lot of chatter in various forums about sleep issues but I can't see much about this particular variation. I've spent several hours scanning through these discussions and general Google searches.
As I say in the title - the symptoms appear to be that the firmware believes the lid is closed and hence the OS X software, such as display preferences, gets locked out from accessing the display after startup is complete. If the OS decides there is no display present it puts the MacBook to sleep.
I have reset the PRAM and SMC, rebooted in Safe Mode, deleted the display preferences plist file, run the Apple Hardware Test - all with no change to the symptoms.
Hass anybody reading this observed the same symptom and noted a method to fix it?
Thanks,
Graham

I had a similar issue where my Late 2008 Macbook would get stuck in closed clamshell mode after connecting and disconnecting an external display, or just closing the lid. Only rebooting the machine would bring back internal video.
External video continued working via the mini displayport, but the internal display would stay black no matter if the external display was connected or not. I was also unable to adjust the display brightness from the internal keyboard, pressing the F1 and F2 keys had no effect (even while holding fn key). Resetting PRAM and SMC had no effect.
I resolved all aforementioned issues by replacing the HDD Bracket with IR/Sleep Cable. This can likely be done fairly cheaply at a local Apple Store.
I might suggest first having the HDD Cable and or IR/Sleep Cable reseated on the main logic board, before replacing anything.

MacBook Pro Retina 15" mid-2012 won't boot in clamshell mode with an external display attached

I have a 15" MBPr mid-2012 running OS X 10.10.1. The system won't boot in clamshell mode (power is connected, lid shut) with an external display attached via an Apple Thunderbolt->DVI adapter. it boots fine if the lid is open. It isn't the adapter or the display since my 15" MBPr mid-2014 boots up just fine connected to the same adapter and monitor. And this system used to boot like this just fine some while ago (probably before it was upgraded to Yosemite). I've reset the NVRAM (twice) to no avail.
Has anyone encounter this? Anyone have a solution? Should I try an SMC reset (always a bit nervous about that)? Might it be a driver issue in Yosemite?
Thanks.

I have a 15" MBPr mid-2012 running OS X 10.10.1. The system won't boot in clamshell mode (power is connected, lid shut) with an external display attached via an Apple Thunderbolt->DVI adapter. it boots fine if the lid is open. It isn't the adapter or the display since my 15" MBPr mid-2014 boots up just fine connected to the same adapter and monitor. And this system used to boot like this just fine some while ago (probably before it was upgraded to Yosemite). I've reset the NVRAM (twice) to no avail.
Has anyone encounter this? Anyone have a solution? Should I try an SMC reset (always a bit nervous about that)? Might it be a driver issue in Yosemite?
Thanks.

MBP Clamshell Mode - DVI to TV Adapter - Front Row Works - But No Video?

Hi all,
Have picked up an Apple DVI to TV adapter for my MB Pro. Have successfully got it to work in clamshell mode displaying Front Row on the TV without the external Mouse or keyboard.
However, it will not play videos or movies on the TV.
If I keep the lid open, it will play the video/movie on both displays as hoped. However, when I close the lid, all other Front Row stuff works - but no video picture! Is this some sort of overlay issue? How can I fix this? I do NOt want to burn my LCD when using it this way - would be a waste.
Please pass on any thoughts!
Thanks,
Stu

I also have this exact same problem. A little annoying since I have just spent $A35 on the mini dvi to dvi adapter and another $A50 on a good quality DVI cable. My LCD tv is set to millions of colors so that is not the issue.
I have a 2.0Ghz Core2Duo Macbook. A quick google search If anyone knows how to fix it I'd be very grateful.

Can't get 'clamshell' mode to work with Dell 2408

I have been trying to get my Dell 2408 working in clamshell mode without any success. I have a USB keyboard, USB mouse, power adapter and monitor via DVI plugged in. I switch the display type to mirror, close the lid, wait for it to sleep, then wake it again by pressing a key on the keyboard.
The computer wakes, the external monitor flashes but at the incorrect resolution (1200 X 800 instead of 1920 X 1200) then goes back to sleep. This will repeat over and over again until I open the lid of the macbook. I can occasionally get the macbook to wake and display on the eternal monitor but this is very rare, and when it does I get some wired artifacts.
What's really puzzling is that the monitor works flawlessly in extended desktop mode, and works perfectly with other non mac computers. I took the macbook to the Genius Bar, hooked it up to the apple cinema displays and i didn't get the same problem! Grrr....
So I just don't get it, both the computer and display seemingly work fine independently from one another, work fine in extended mode, yet in clamshell mode have some fairly major issues.
Anyone have any ideas?

My dell 2408 arrived today and I'm having exactly the same problem.I cant get it to go into clamshell mode. I lie, I got it to go into clamshell mode once. I don't know what I did. But it certainly isn't willing to go into clamshell mode again any time soon.

Clamshell mode & possible battery issues

Similar Messages

Maybe you are looking for