External Monitor connects, disconnects, re-connects, disconnects, endlessly

Hi,
When I physically connect my Lenovo G575 laptop, running win7, to my LG LCD monitor via VGA cable, my laptop will not remain internally connected to the monitor. The laptop disconnects, then re-connects, then disconnects to the monitor repeatedly. So, there is signal feed being sent from the PC and recieved by the monitor, then the disconnect sound is made and the signal stops... then the connect sound is made and the signal is restored to the monitor, over and over again. During connections, the monitor displays as desired. This monitor and VGA cable work flawlessly on my other laptops, but not my Lenovo. I've tried changing the resolution settings on the computer, which does not solve the problem. How do I get the Lenovo to remain connected and feeding signal to the TV? Any ideas? What could the problem be?
I've read the Lenovo owners manual for my model. There was nothing relatively helpful in it.
Adapter Type: AMD Radeon HD 6310M [Computer says "This device is working properly" & is also up to date]
Driver Version: 8.792.2.4000

Robert,
My wife's MacBook exhibits the EXACT same problem. The speed drops from around 3,100kbps to as low as a lousy 80kbps as soon as the external monitor is connected. I get 3,200kbps on my desktop, which is NOT on wireless.
Her monitor (ViewSonic LCD flat panel, I believe) is connected directly to the MacBook, as it came with the appropriate connector.
It's very discouraging that you don't have an answer yet after two months.
The next step has to be to bring the MacBooks back to Apple for replacement of the internal airport card.
Thanks for having posted this.
—Ramón.
Message was edited by: Ramón G Castañeda

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However, as time went on, I noticed my wireless connectivity was getting terrible. Extremely slow Safari page load times, and upon going to Terminal and pinging my router, I would often get response times of 21000 milliseconds, or worse! I did a lot of research, on router firmware, on wireless connectivity, etc., but to no prevail. Then, on a whim, while continually pinging my router, I removed the DVI adaptor from my monitor. The ping instantly dropped from tens of full seconds to just a stable 0.4 milliseconds! Using my VGA connection resulted in no worse wireless connectivity than without it, but upon plugging in DVI and stressing the connection a bit (i.e. downloading a large file), the connection went bonkers. The pings also immediately jump from 0.4 milliseconds to a range of 1-4 milliseconds, regardless of any "stressing".
I have done numerous research, including searching both here and on other discussion forums. It appears this problem with DVI connection is fairly common, but with no resolution so far. Any help would be great!
A few important notes:
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-I have tried numerous channel changes of my router, to no prevail.
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I have this same issue with the dvi and wireless disconnect. I am using a samsung 214T. I am glad to know i am not the only one seeing this, because it is kind of one of those things that is hard to believe. Anyway, I am also curious what kind of routers people have who are experiencing this issue. I am using a wrt54GL with tomato firmware.
Also, In addition to the disconnect, my picture quality on my monitor gradually degrades over time...starting with what looks like snow flecks. After waking from screen saver, sometimes it is full static. Turning off and turning back on the monitor clears the static away.
I can use another samsung 19in monitor with dvi without any problems.

Can't connect to external monitor (possibly after Yosemite update)

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Basically I have the same issue. I also suspected a software update (though I am using Mavericks). However, it does play with an older version of Adobe Premiere (CS 6). So I suspect that one of the manny updates to CC broke the connection. It's an important part of my workflow, so let me know if you find out anything. I don't have a solution right now.
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Premiere CC not showing video to monitor
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bump^
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I'm not sure how installing an application would cause that to happen. Have you shut down (powered off) the iMac completely, and then restarted, since this problem occurred?
Some display settings are stored in PRAM, so if you have not already, try resetting PRAM
http://support.apple.com/kb/HT1379
If that does not help, you can try disconnecting the iMac from power and reconnecting it, using the reset SMC (power management) procedure.
http://support.apple.com/kb/HT1543
When you reconnect it, initially connect the iMac to a wall outlet, by itself. Leave all peripherals disconnected, except for your USB keyboard/mouse. Make sure it is working properly, then connect only the external display.
If it still does not work, as a test, start up with your Mac OS X installation disc. You are not installing anything, but note if the second display is displaying the background image or not when you are booted from a different system.

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In iMovie>Preferences>Playback do you have "Play DV project video through to DV camera" checked?
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How do I get a video signal to an external monitor via the mini-display port on my Mac Book Air?

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nchelliah wrote:
Thanks for your help What about a HDMI to VGA cable? Would this work?
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External monitor is not listed by xrandr

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)

GS70 Stealth Pro Crashes when using external monitor..

Hi Guys,
I just bought a GS70 ghost pro a few weeks ago and have been loving it, no problems, running Battlefield 3 and watchdogs..
However I just bought an external monitor, Asus VG248QE, when i connected it via display port and tried to play Battlefield 3 on the external monitor the laptop crashed - both screens blank- fan on- power button went orange- had to hold down the power button to reset.
Tried it again, opened Bf3 in window mode, put it on external monitor, went to full screen - it played ok for a few minutes then the laptop crashed again..
I had played bf3 no problems on the laptop screen previously.
Anyone got any ideas what might be going on? I'm new to gaming on pc so I'm a bit lost, any suggestions would be welcome.
Thanks,
Dan

Which nvidia driver are you using? (latest one from nvidia GeFormce Experience or MSI website)
Try to use the one from MSI website and update the latest VBIOS(80.04.F7.00.0C).
http://www.msi.com/support/nb/GS70_2PE_Stealth_Pro.html#down-firmware&Win8.1 64
step by step guide:http://www.msi.com/files/pdf/VBIOS_Update_under_DOS_mode_EN.pdf
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Second (!) external monitor lagging after OS X update

Hi,
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I use a Terratec Connect A1 card for the link.
thx

I have noticed something similar on my Win7x64 system, but am not able to reliably reproduce it. It seems, for me at least, to be a combination of +Clarity and Lens Profile Correction which will always trigger an observable screen redraw when moving from segment to segment in 1:1 view mode. The variable is the delay.....most often it's a fleeting effect, but occasionally there's a more obvious delay in redrawing the image display. I suspect the more obvious delay is, in addition to the +Clarity and Lens Correction, some internal resource utilisation over a longer Lightroom session....certainly every time I've encountered it a Lightroom restart has cleared it up.
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My notebook is Macbook Pro 374, OSX 10.9.1.
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No there isn't...
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Try Function F1

[SOLVED] Run hook on external monitor connect/disconnect

I want to run a script whenever I connect or disconnect an external monitor from my laptop.
Is there a hook I can create somewhere to achieve this?
Last edited by Bruce Connor (2013-07-16 16:03:03)

Unfortunately that doesn't seem to be working for me. =/
I've inserted
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IChat disconnects when external monitor connected to Macbook Pro.

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Hi,
I am not going to be much use here.
I don't have a computer with Thunderbolt.
The computer I do run a second screen on is a G4 running Leopard and in the Energy Saver there is no setting for the second screen to be set independently than the main screen.
I think it may pay to ask again in the Lion Forum Community.
8:03 PM Friday; September 23, 2011
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
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 MacBookPro 2Gb( 10.6.8)
 Mac OS X (10.6.8),
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External Monitor connects, disconnects, re-connects, disconnects, endlessly