Screen detection in clamshell mode problems

Yes, I am experiencing the same problem. Macbook Air i7, 10.7.2.

Thanks!

-Jeff

I have the same problem with a brand-new Late 2011 13" MBP with all updates,

clamshell only works correctly if I restart in clamshell with power supply and all externals

plugged in, then it works great and you can even open and close the lid and the lcd will

activate and de-activate but if you unplug the monitors and/or the power supply then the

lcd will always be active even with the lid closed and the backlight off - it's great opening

a window on a closed display that you can't see. Then the only fix seems to be a reboot

with everything plugged in as above.

I'm wondering if I should "upgrade" to Snow Leopard?? I don't really have any files on this

machine yet...

Same issues here on a late Macbook Air 2011 11" hooked up to a dvi display via a display port adapter. It used to work, but started after the 10.7.1 or 10.7.2 update.

Just finished installing SL, now it works great, no problems with plugging and unplugging power cord or opening and closing display. This is definitely a Lion issue.

UPDATE: After getting clamshell to work with SL I re-installed Lion on my second partition. I downloaded and installed all updates EXCEPT the Thunderbolt 1.1 (which addresses screen issues), now clamshell works fine in Lion. The next step would be to install the update and see if it breaks. In addition to the "screen issues" nature of the Thunderbolt update I also noticed that clamshell only worked for me with a screen plugged into the mini-DVI/Thunderbolt port. My other screen runs off a DisplayLink USB adapter and didn't clamshell by itself but worked fine with a hard-wired display, which is another possible clue that maybe the Thunderbolt update is causing a problem or is invovled...

Well, I installed the Thunderbolt update and rebooted and I was about to say that everything was fine, which it was. I could plug and unplug the power and I could open and close the screen, no problem. Then the laptop went to sleep while I went out on the town. When I came back and woke it up (still closed) the backlight lit up and lo and behold I'm back to the same old problem, lcd screen active with the lid closed! So now I still don't know if the update did something or whether I was just getting lucky before the update and just never had the sleep/wakeup cycle to break it... I'm going to go back over the SL side now and see if it's working over there or not...

Everything's still fine on SL including plugged in, unplugged, sleep/wake... I think my Lion is a bad kitty.

Back to Lion, same problem: Boot in clamshell, it recognizes the external display, go to sleep, wake up and the internal lcd activates with the lid closed, at which point I think all you can do is reboot... no closer to a solution but at least the problem is easy to reproduce. :|

Now my Lion is very confused, it's giving me the menu bar on my external monitor and my dock on the (closed!) internal monitor - what fun! I didn't even think that was possible! Repositioning the white bar in the display arrangements doesn't solve the problem, either. Well, back to SL!

I have a MacBook Air late 2011 and just reinstalled from the recovery partition (It took forever). I've had success (over the last 24 hours) in operating with the lid closed while plugged into an external display.

Same for me: MacBook Air 13-inch, i7 with Apple Thunderbolt Display.

Was this issue ever resolved for anyone? I'm seeing the same issue running 10.7.2 on a 2011 MBA and it's very annoying. I rarely reboot my computer and it's a pain having the internal LCD come on every time I wake it up in clamshell mode... I'd go back to SL in an instant if it was an option.