Dual Display - Laptop screen won't wake up 50%+ of the time

My laptop is connected to an external monitor, with the monitor set as the primary display.
I put the laptop to sleep by closing the lid.
Often, when I open the lid the laptop screen will not turn on. Just the monitor, and then it acts as if it is a single display. The only way I've figured out how to fix this is to completely shut down the laptop and boot back up.
This started suddenly last month, right after changing jobs. The new job had an unknown amount of software installed (including MS Entourage) and the entire system encrypted by the new company's IT department. I don't know if these are related, but the coincidence is hard to ignore.
I also will occasionally not be able to fully wake the computer. I'll get a black screen and a mouse cursor but never get the log in prompt to bring it out of screen saver mode. This problem sometimes occurs with the above issue, but often they are separate. Though this also just started. (I suspect this second issue could just be performance problems with new software bogging down the system over several days). Although the same solution is to shut down the system. It's just that in this case, the only way to shut down is to force it with the power button.

I have a similar problem that just started recently. I've been using a dual monitor (Wacom Cintiq) since last Novemeber, and now at random times when I attempt to wake up the computer I get a black screen on both monitors. I know the computer is on because of the system beeps I generate while pressing the keys. The monitor just won't come on. Normally I thought the power light below the latch opening would cycle up and down, while asleep, but when this problem happens it is just on. When the lid is opened the light fades out. Computer is running, just no screen. The last time this happened I had to power it down. I've tried disconnecting the Wacom Cintiq monitor, the external keyboard and the Wacom tablet. No Luck.

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This has been happening for awhile now (checked with my father in law, who has a macbook pro, and he says the same thing happens to his): I close the lid, it goes to sleep. When I open the lid again, half the time it'll wake up, and half the time it won't (even pressing buttons, etc). I'll have to hold down the power button to turn it off, then press it again to turn it on and start up from scratch, losing whatever I was working on. There's seemingly no rhyme or reason to it...but it happens about half the time. The other thing I notice, when this happens, is that the "sleep" light (that is usually flashing when it's sleeping normally) turns on solid when I close the lid rather than flashing, and turns off when I open it.
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Message was edited by: Evan!

I cannot solve your problem but I did have the same problem which has now evolved into my computer NEVER going to sleep and my bluetooth does not work I have tried all the advice I can find and nothing works. Of course my waranty expired four months ago so now I will have to come up with the money to fix it if I want this resovled. If your warenty is still good I suggest having someone look at it before it evloves into a bigger problem.

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Last edited by babbupandey (2015-06-05 05:47:01)

Hello i think i may be able to help with your problem, i had a similar one
I have an alienware m14xr2 and i also tried to do the same but i noticed when using the nvidia card with the nvidia drivers i had a problem, i assume that the external display is connected to the intel card, as it worked perfectly with the intel only driver setup. To fix this issue I use bumblebee, the nvidia optimus alternative for Linux which uses the intel card as primary, allowing me to use both external and internal displays in extended mode, and run what i need on the nvidia card and pull it over with a virtualgl bridge, i even seam to get a performance increase with bumblebee over the regular nvidia drivers running all the time (only when using primus).
https://wiki.archlinux.org/index.php/bumblebee
Here is a link to the bumblebee page i used, though i had problems setting up that i found many alienware users had that can be fixed in the troubleshooting area bellow "[ERROR]Cannot access secondary GPU: No devices detected"
I noted many alienware uses had this problem in my search.
Also the package arandr is an xrandr front end may help in the initial setup as i had problems using the display config built into cinnamon to do this.
https://www.archlinux.org/packages/comm … ny/arandr/
Now hopefully this makes at least dual screen working, i use dual with hdmi, and the vga should work ok for your third screen, but im not sure about the display port, never tried it and i believe it is on the Nvidia card, but there are instructions on the wiki page above you may be able to use about multiple monitors when the output is on the other card that may help, again try the vga first works on mine.
As for fixing your current xorg issues, i also did a thing in my attempts to get a working situation and eventually gave up, in the end reinstalled arch and followed the wiki and it worked, but mabye try removing all of x org and your display environment and re-install as per the bumblebee wiki.
i hope this helps you get multiple monitors, i know how amassing they are to use

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I was so frustrated I call the Apple Tech Support and they walked me through. It has been doing great. The screen still turns black but now, when I touch the mouse or touch pad, I get the password prompt. The Apple Store did not help but talking the the Apple Tech has helped a lot. Thank you.

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Everything worked amazingly well for the first few weeks. Now, not so much....
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[SOLVED] Help with dual monitors (second monitor won't wake up)

Hi. I'm trying to set up dual monitors, but I can't seem to get it to work.
I've got an ASUS P8H67-M EVO motherboard, and I'm using the xf86-video-intel driver. I'm using one VGA and one HDMI.
xrandr gives this
xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
VGA1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 60.0*+ 74.9
1600x1000 60.0
1280x1024 75.0 72.0 60.0
1440x900 75.0 59.9
1152x864 75.0
1024x768 75.1 70.1 60.0
800x600 72.2 75.0 60.3
640x480 72.8 75.0 66.7 60.0
720x400 70.1
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
1920x1080 60.0*+ 50.0 60.0
1920x1080i 50.0 60.1
1680x1050 59.9
1600x900 60.0
1280x1024 75.0 60.0
1280x960 60.0
1152x864 75.0
1280x720 50.0 60.0
1152x720 60.0
1440x576i 50.1
1024x768 75.1 60.0
1440x480i 60.1
832x624 74.6
800x600 75.0 60.3
720x576 50.0
720x480 59.9
640x480 75.0 60.0 59.9
720x400 70.1
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
So it looks to me like both displays are being detected. The geometry looks such that one display is on top of the other, but I can change that using an xorg.conf.d config file (e.g. https://wiki.archlinux.org/index.php/Mu … xorg.conf). I also tried using arandr.
The real problem is that the display on HDMI3 just isn't "waking up". The power is on, but it just sits there in sleep mode.
Any help would be great. I might just be missing something simple. Thanks.
Edit: I just saw a short list of window managers near the bottom of the Arch Multihead page (https://wiki.archlinux.org/index.php/Mu … _xorg.conf). I don't see openbox on that list. Does that mean I'm SOL if I want to use openbox with multiple monitors? This page seems to imply that it should work fine with openbox http://magnatecha.com/dual-monitors-wit … nd-xrandr/.
Last edited by Pacopag (2013-08-19 18:58:36)

I use XFCE, and when I boot my computer I just run:
xrandr --output DVI-I-1 --auto --output DVI-I-2 --auto --left-of DVI-I-1
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Dual Display - Laptop screen won't wake up 50%+ of the time

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