External monitor suddenly not recognised

Hi everyone,
Not sure if anyone can help me, but thought I'd try here before progressing any further. I have an 11-inch 2010 Macbook Air with an external monitor set up (Acer LCD, if it makes a difference) through a mini-display port to HDMI converter. Up until yesterday it was working with no problems, the HDMI does sound as well as video and it was very easy to set up and use.
Yesterday I tried plugging in the converter to the Air and turned the display on and I got a "Cable not connected" message on the display. I checked the plugs and restarted my Mac, but the same message came up.
The Air's screen flashes blue when the display is turned on, so the cables must be working to some extent (at least enough to recognise the display has been turned on). But the display system prefs and menu doesn't show it connected, and there's no option to turn mirroring on or anything, as there usually is.
Unfortunately I don't have any other HDMI cables or a converter to test this, but I was wondering if I can try anything else on my Mac before tracking some down. Would appreciate any help.

deed wrote:
My Macbook Pro ran out of hard disk space, and suddenly stopped recognising my external hard drive
Hi, and welcome to the forums.
It's very unlikely these two things are related, even though they apparently happened about the same time.
As you probably know, OSX likes at least 10% of it's drive free, 15% is better, 20% optimum (although I suspect that on very large drives, you don't need quite as much free space, percentagewise).
As dechamp says, the best way to be sure the drive is dead is if another computer doesn't recognize it either. In theory, something like DiskWarrior might be able to deal with it, but it's pretty unlikely to be worth the money (about $100 for DW) if you don't already have one.

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Hello @Bjenkins,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your external monitor will not display full view Microsoft applications on your system, and that certain functions will not work on your desktop. How long ago did your applications work properly? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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salkenward
Welcome to the HP Community Forum.
This issue is frequently caused by a driver malfunction although the problem could be just about anything.
You didn't provide any information.
The good news: You can still help yourself and there is lots of help available, including -- in many cases -- the printer software for your computer so you can reinstall and be on your way again.
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Click Accept as Solution when the Answer is a good Fix or Workaround!
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Hi, I'm new to the forum so apologise in advance if I'm a little technically incompetent. I have viewed other similar posts on this forum but none seem to have the same specific issue that I'm facing.
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Hi @chipps24
Welcome to the HP Forums!
It is a superb place to find answers and ideas!
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
Have you ran the HP Support Assistant go get any HP updates?
Have you done all your Windows updates?
I see you are having a difficulty connecting additional monitors. Here is a link to HP Notebook PCs - Connecting a Monitor, Projector or TV (Windows 8)
If this has not helped alleviate the issue, I suggest contacting HP support for assistance.
Please call our technical support at 800 474 6836. If you live outside the US/Canada Region, please click the link below to get a support number for your region.
World Wide Phone Support
Good Luck!
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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Message Edited by mstrom on 07-03-2008 04:03 AM

T23FUN wrote:
Hi,
Does the external connections and cables work with another system. I'd do that first.
If all of it works with another system then it could be drivers or internal things but try that first.
There are some driver updates on the Lenovo site. Make sure your BIOS are updated and such.
Good Luck,
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I definitely understand your concern regarding your external display not going to sleep and endlessly looping into power save mode when your MacBook Air is asleep.
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Reset the system
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Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Thank you for using Apple Support Communities.
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Message was edited by: earnerich

earnerich,
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Hi,
I have an external monitor (VGA) connected to my laptop. All worked fine until the last nvidia-package update. X would no longer start up and therefore I decided to use the free nv driver instead (xf86-video-nv package). I updated my xorg.conf and everything was fine except that my external monitor isn't recognized.
I own 2 external Monitors with VGA. When connected, both show the same picture as the internal monitor of my laptop but the picture is "shaking" the whole time. Doesn't look very healthy at all...
(And I don't want a duplication but an extension of screen space)
When I invoke xrandr it only lists my internal display. So I suppose the problem lies below all the Xorg.conf stuff. But I have no idea where to look for the cause of the problem.
Is the kernel responsible of recognizing my monitors? Or is it a differenz component? How can I find out if the kernel(if responsible) has recognized my monitor?
My system is up to date. No packages are held back. The relevant hardware is:
Nvidia GeForce 7400
Fujitsu Siemens (no model specification available)
Samsung Syncmaster 2243 BW
the following daemons are running:
crond dbus hal netfs network smartd syslog-ng
Last edited by essence-of-foo (2009-08-07 20:13:08)

Thanks for your replies.
djszapi wrote:1. You can create an xorg.conf with X -configure or with hwd, or try it without xorg.conf.
Does that mean that xrandr looks into the xorg.conf to see if there are more monitors?
I tried both methods.
X -configure created an xorg.xonf with the instruction to use the nvdia driver. The result was (as expected) that the screen of my monitor stays black and only sysreq could help me to reboot. I edited the file to let the xserver use the nv driver but this changed almost nothing except that I still could use the ctrl+alt+F1... keys to get back to the virtual console (remember: X was all black. No windowmanager ect. )
Using no xorg.conf has the same results as my current xorg.conf which I will paste later in this post. edit: The xorg.conf generated by X -configure has been attached too
2. Which version of kernel/driver do you use ?
As I wrote - everything is up to date.
That means:
Name : kernel26
Version : 2.6.30.4-1
Name : nvidia
Version : 185.18.31-1
Name : xf86-video-nv
Version : 2.1.14-1
Name : xorg-server
Version : 1.6.3-2
Name : hal
Version : 0.5.12git20090421.4fc367-2
3. Is it a 32/64 bit system ?
32 bits
4. Maybe you can show some related log files, like xorg.log, error.log, syslog.
Of couse:
xorg.conf (written by me):
Section "ServerLayout"
Identifier "Builtin Default Layout"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
EndSection
Section "ServerFlags"
Option "Xinerama" "0"
EndSection
#--- first screen settings
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
Option "TwinView" "0"
EndSection
Section "Device"
Identifier "Device0"
Driver "nv"
BoardName "GeForce Go 7400"
BusID "PCI:1:0:0"
Screen 0
EndSection
Section "Monitor"
Identifier "Monitor0"
ModelName "Nvidia Default Flat Panel"
HorizSync 29.0 - 49.0
VertRefresh 0.0 - 61.0
EndSection
#--- second screen settings
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
Option "TwinView" "0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nv"
BoardName "GeForce Go 7400"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Monitor"
Identifier "Monitor1"
ModelName "Samsung SyncMaster"
#HorizSync 30.0 - 81.0
#VertRefresh 56.0 - 75.0
Option "RandRRotation" "yes"
EndSection
errors.log:
Aug 6 19:09:34 Linuxbox kernel: NOHZ: local_softirq_pending 80
syslog.log
Aug 10 18:02:02 Linuxbox syslog-ng[3632]: syslog-ng starting up; version='3.0.3'
hmm why dont u use the nvidia pakage ? Then you could use nvidia-utils for twinview
I did. But since the last update I can't use the Xserver any more with the nvidia driver. And nvidia's tools only work when the driver is already working in the background.
However I'm still wondering which component is responsible for recognizing the monitor. This will probalbly help me to investigate the problem.
edit: xorg.conf generated by X -configure and edited by me:
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Type1"
EndSection
Section "Module"
Load "dri"
Load "record"
Load "extmod"
Load "dbe"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Device"
Identifier "Card0"
Driver "nv"
VendorName "nVidia Corporation"
BoardName "G72M [GeForce Go 7400]"
BusID "PCI:1:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
I changed the driver to "nv" and removed the glx module because the xserver was complaining. But this didn't change anything. The error messages are:
X.Org X Server 1.6.3
Release Date: 2009-7-31
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.30-ARCH i686
Current Operating System: Linux Linuxbox 2.6.30-ARCH #1 SMP PREEMPT Fri Jul 31 18:10:38 UTC 2009 i686
Build Date: 03 August 2009 08:45:00PM
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Aug 10 21:03:11 2009
(++) Using config file: "xorg.conf.new"
(EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found)
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
error setting MTRR (base = 0xb0000000, size = 0x04000000, type = 1) Invalid argument (22)
Last edited by essence-of-foo (2009-08-10 19:10:58)

External monitor preview not working in CS5

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External monitor suddenly not recognised

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