Ubuntu :: Monitor Randomly Loses Signal And Cannot Be Turned Back On
Feb 11, 2011
I have this issue with two different computers. One is a dell optiplex gx60 and the other a hp pavilion a317x. The two monitors are a hp pavilion f70 and a nec mulitsync lcd.
The problem I have is the monitor will randomly turn off like it would if the signal is lost but the computer is still running. I cannot get the monitor back on unless I do a hard shutdown and reboot. Sometimes it will happen within minutes of turning on the computer and sometimes it will take hours or days. I have had this problem with ubuntu 10.04 which is currently installed, mint 9 xfce, and mint 9 fluxbox. The only distro that it did not do this on was peppermint ice and windows xp.
I don't know at this point if it is hardware or software related. I am new to linux so I don't know what else to look for.
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Jan 23, 2009
I'm trying to install Fedora 10. I'm booting from a CD, and the installation gets as far as those 3 progress bars in the very beginning. As soon as they all load, my monitor goes black and starts flashing a "DVI Input Out Of Range" warning. That's all.
I'm using a
nvidia geforce 8800 gtx
and the Planar PX3611W monitor.
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Oct 30, 2014
i have a probelm once i leave my laptop there for a while the monitor turned off and there is no way for me to turn it back on, so i need to restart the machine.
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Oct 20, 2010
I am having this weird problem when I turn off my PC and then when its turned back on there are items on the desktop that were not there before (they had been previously but been moved to another folder).Also partitions that I dont want to mount are suddenly mounted and I have to umount as root. I think I have some problems in my grub2 installation since installing 10.10. I ran the boot info script, and can see that there are problems but I get nervous messing with grub
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Jun 18, 2011
Debian, Squeeze, Gnome. Laptop AJP7521P. I had it on for a few daysThen i decided to close the lid (hibernate). When i turned it back on, it did not load. It has a black screen with GRUB written on the top left. I think that grub does not load.My /(root) partition is sda4.Would update grub fix it? (I am worried whether it will find sda4).
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Jun 25, 2011
Wife's laptop has AR5001 Wireless Adapter laptop model is Toshiba Satellite A215
Problem : Wireless networking randomly loses connectivity and can not regain connectivity, the only apparent solution is a full power down , this is not even certain to work. The card works under Windows, she hates Windows. (I love her for this) I know it's not faulty hardware , because it will work for days on end under Windows without problems.
Things I've tried : madwifi drivers (any and all versions available) : These increase stability of the signal and seem to delay the inevitable however it still happens. When using these drivers the only option is to unload them modprobe -r then reboot then remove them again and re add them. It makes no sense why this works, and if I don't remove them prior to rebooting it will not work.
ATH5K drivers : These are pretty much junk, results are unpredictable at best, sometimes it will work perfectly for a few hours, sometimes it will not work at all. Nothing is repeatable, I can't seem to force whatever condition is causing this. rfkill does not show the wifi being blocked (hard or soft), unblocking it anyway does nothing, only way to make this work and it's iffy is to fully power down wait 5-10 minutes turn it back on and it MAY decide to work.
Firmware update : Updated the Toshiba BIOS to the latest version of the firmware 2.0 no joy here either. Same issue both sets of drivers.
Tried different distros and kernels : I've tried Mint 9, 10 ,11 ; Ubuntu 10.10, 10.04 , 9.10 and 11.04 (which is currently installed) , Fedora and OpenSUSE. All are giving the same problems. I have also tried a slew of different kernels no joy from any of them (I'm not at the computer with the issue now I will post exactly what kernel versions I've used when I have access to the machine).
Another useful bit of information, the hard switch to disable/enable wifi WILL disable it but turning it back on does absolutely nothing. The hotkey does nothing at all. The bios does not have an option to disable or enable the wireless card.
I will also post the typical lsmod , lspci , iwconfig all that good stuff when I get back to the computer in question. I'm probably just going to buy a PC card for it and give up on that one, but this is driving me insane and I would really like to see it resolved even if I do replace the hardware.
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Apr 2, 2015
Fairly new to debian and linux and general. I have an install of debian wheezy (to run LinuxCNC). I went in the graphical interface to the 'monitor' section and changed the screen resolution. I had two monitors, one labeled monitor and another (I think) Lenovo Monitor.
There was a check box in the screen monitor window that said something like, "Don't use this display." I figured it might turn off the lenovo and default to the generic monitor listed. I clicked it and my monitor turned OFF!! I tried another monitor (Dell in this case) and same thing, no video output.
I asked on the LinuxCNC forum and googled, but I just dont' seem to be able to figure out what or how to get to the solution.
I have been able to Ctrl-Alt-F1 to open a terminal. But, I can't find any the right files and found that the xrandr command 'should' work, but doesn't.
Whenever I issued the xrandr command (other than man xrandr), I get "Can't Open Display"
I did find two outputs VGA1 and LVDS1 in this file /var/log/Xorg.0.log and this coincides with what I saw in the monitor window. These are the 'output' types and if the xrandr command worked I'd issue something like : xrandr --ouptut LVDS1 --auto
I read about xorg.conf, but I could not find any xorg.conf files in the etc/X11 folder. In some of the info I found, the xorg.conf was replaced in this or a recent version of Debian by something else and confuses me.
One person had a similar issue and he got to this directory: $HOME/.e/e/config/standard" and found files such as:
"e_randr.cfg" plus "e_randr.1.cfg" thru "e_randr.9.cfg"
But, I can't get to that folder. How to turn on my monitor display?
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Feb 11, 2009
I have fedora 10 installed and when my monitor is turned off the X session fails to start because it can not probe for settings. Is there a way to hard code the settings for x instead of letting them assign dynamically on boot?
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Jan 3, 2011
Ok, first off I installed the disc after having to holed select for the language to come up then selected the nomodeset option before installing, then I installed, restarted and got no signal. After that I tried to edit the grub like a thread said by changing splash or whatever to nomodeset and it won't allow me to edit.
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Jan 24, 2011
I have an Asus Eee PC with Ubuntu Netbook Remix (Unity). The other day, I turned off the wireless using the keyboard shortcut to save battery life when I was somewhere without wireless, but now it's not turning back on. I tried restarting, I've done the keyboard shortcut several times, and it still just says "disconnected" for wireless and wired, even though there are several wireless networks around me right now. There aren't any options in Network Connections or Network Tools to turn on the wireless. Is there a way to manually turn it back on?
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Sep 13, 2010
If I turn off the monitors, I get a black screen (the monitors goes to power save) when I turn them on again.
I have a workaround which involves pressing ctrl-alt and f3 and then ctrl-alt f7. That usually works and brings up the graphical login-screen. And I get my session back.
But sometimes when I log in, my session is gone. It is as if I was logged out or the system has rebooted.
I have two monitors and Nvidia.
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Nov 28, 2010
I basically destroyed my laptop a couple of years ago. Windows XP wouldn't even start but it didn't come with an installation disk. I tried recovering it but it just died. So a few months ago I put a box of thing on top of it which broke the screen! I was going to chuck it out until I stumbled upon a page which told you you could use it as a web server.
I decided to use it to host my website. I installed ubuntu without a problem however it wasn't until I was about to start it up I found out it was against BT's terms and conditions!! So since I installed ubuntu I thought I might as well make use of it and use it to render my files. When I went to turn it on for the second time and plugged it into the monitor it said input signal out of range!
I can see the login screen but I can't move the mouse or anything. I can't access the terminal, how can fix this?
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Jan 5, 2010
I am facing weired problem while installing Ubuntu 8.04 on my desktop
specification of it
Intel Core 2 duo 2.93
4 GB RAM
500 GB HDD
Intel Motherboard DG41 RQ
it goes on loading ubuntu and then after when i am suppose to get my home screen with bird background to view, monitor stops getting signal.
i tried both 32 bit and 64 bit
ubuntu-8.04.3-desktop-amd64.iso
ubuntu-8.04.3-desktop-i386.iso
but no luck where as 9.10 works like a charm and i have no issue in working with it.
but because of some external H/W drievrs i need to stick to old karnel version which supports 2.6.30 or lower
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Mar 19, 2011
I use my old computer as an NAS, so I remove the monitor after I installed linux on it (disconnect vga cable). I use ssh to control the machine and it works fine. Until some day, after kernel/softare upgrade or messing up some configs, I cannot connect to it through ssh, then I have to plug the monitor back, but the monitor says "No input signal". So I have to restart the computer WITH the monitor connected, and the monitor's back!
I think the computer/linux kernel doesn't detect the monitor plug-in event. So how can I start my linux box without a monitor, but when it goes wrong I can still plug my monitor (vga) back and use the console.
Edit: just one pci-e video card, has dvi, vga, tv/out (s-video)
Edit2: Xorg is not running. I just need the console (CTRL+ALT+F1). The problem is, if the machine booted without a monitor connected, it won't give me a pseudo terminal after I attach the vga cable while it's running. Clearly the monitor is not auto detected as usb device. I'm wondering how to let the monitor auto detected.
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May 23, 2010
So my computer works reasonably fast running XP (old 3GHz processor with 512RAM), but every so often it simply freezes. I've tried all I can to fix this, but sometimes when I boot up XP it'll get to the window's logo then freeze, sometimes it'll get all the way to the desktop and then freeze, and sometimes it'll start up, run fine for an hour or two then freeze. By freeze, I mean the screen doesn't update, the keyboard and mouse do nothing. Updating NVIDIA drivers doesn't seem to help - some make it worse! So I've had enough, and decided to download Wubi to try Ubuntu on it. I'm not ready to remove windows just yet (lots of data on this machine) and so I don't really want to try dual-booting yet.
Wubi downloads and runs in Windows fine. When I go to restart, after picking Ubuntu from the menu it shows a little text (I think about installation, and press Esc for menu) then my monitor gives a "No Signal" message. So I try restarting (pressing the button), and pressing Esc to bring up the menu. I tried all 5ish options, and "Safe graphics mode" and "ACPI workarounds" seem to last longer, but the same error occurs, before it has even prompted me (still doing its own thing). So I can get up to GRUB, and even get into the grub> prompt. I tried adding irqpoll and/or all_generic_ide to the boot thing (pressing e in the grub menu), but that hasn't helped. I'm unsure of how to find what hardware my computer has (only computer, don't have receipt), but I know "NVIDIA GeForce 6600 GT".
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Sep 22, 2010
I am looking for a tool that can monitor my 3g signal.
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Feb 16, 2010
This is the difference in the output of a port scan using Zenmap on the same system with UFW turned off and then with it turned on. It is obvious that UFW works.
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Jun 22, 2010
I did a fresh install of Lucid Lynx, and now when I start up it shows a blinking cursor for a second or so and then my monitor shows an "Input signal out of range" error. The same thing has happened before, and I was able to fix it by editing the boot options in grub to include 'nomodeset'. However, this time the usual grub loading screen where I would normally press esc to edit the boot options doesn't appear. (Spamming esc doesn't seem to work either.) If it matters (which I have an odd feeling that it does) I partitioned the hard drive into an ext4 partition that mounts at / , a swap partition, and another ext4 partition that mounts at /home . I attached a screenshot of what GParted says about it.
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Jul 21, 2011
I am running 11.04 on a new Gateway with 8 gigs of ram. It is a solo installation. The monitor is connected via an HDMI cable. Everything was great (installation running smoothly for over a month) until last night. I just installed a netgear router and was setting it up with the system to try to get Stanza on my IPAD to connect to Calibre. Anyway, i suffered a severe freeze up warranting a hard boot. I could see the drive working, ancillary drives lit up, keyboard lit up so I know the system is working. The monitor did not come on, It shows a yellow light indication no signal. It is a 28" Hansspree. I tested the monitor by hooking it to a laptop. The monitor is fine. I cannot see anything on the screen so I can't boot to repair mode or use a CD. There is no signal.
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Jul 15, 2010
My time keeps getting thrown off by about 15 minutes. It corrects itself randomly but then goes back! Not sure yet if it's decrementing slowly or if it takes 15 off all at once.ntpdate ntp.ubuntu.com puts it back, output is:Code:15 Jul 08:09:29 ntpdate[6157]: step time server 91.189.94.4 offset 1056.199059 secCurious what the "offset" means. Is there a way to ensure it keeps constant time without having to do it manually?
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Feb 2, 2010
The wireless connection works fine. The wireless switch automatically turns itself on every time I start the computer. However, after turning it off, I can't ever turn it on again unless I restart the computer. And because of this, the wireless connection is disabled until the next time I start the computer.I don't think this is a hardware problem because the switch can be turned on and off, although not in the way I expect.
I'm using ubuntu 9.10 on an Acer Aspire 4740G. The command [lspci | grep Network] shows Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01). the [rfkill list] command shows (when the switch is on)
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
and, as expected, shows (when the switch is turned off)
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
I just want to be able to turn the switch on or off at any time I want as long as the computer is still on.
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Jul 13, 2011
I have just "finished" updating my Ubuntu 9.10. (somehow I knew that something is going to go wrong), and now my PC starts, works fine for a few seconds, then I get a black screen for a moment, and then my monitor starts acting like PC is off.Interestingly I think that otherwise everything is working just fine and that I just can't see anything due to the black screen (monitor is flashing like there is no signal coming from PC).
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Feb 19, 2010
I usually log out from my account, let the pc working and close the monitor. When after some hours I try to open again the monitor I get the msg "No Signal" I move the mouse I press some buttons at the keyboard but nothing.. I have to reboot again to see the monitor working.. What can I do?
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Jul 6, 2010
We have a quad core Intel Xeon E 5410 processor running on recently installed centOS 5.5. Machine can't be pinged all of sudden and when we switch on the monitor, no signal on it, even no response on keyboard. We thought the problem accorded with abrupt temperature changes, is it so? But we have similar machines running efficiently under same temperature conditions.
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Mar 9, 2011
I have a Fujitsu Siemens T3010 Lifebook on which I have Ubuntu 10.10 installed. The installed kernel is 2.6.35-27. lspci lists the installed network contraller as:
01:0d.0 Network controller: Intel Corporation PRO/Wireless LAN 2100 3B Mini PCI Adapter (rev 04) At first glance, the wireless adapter seems to be functioning normally. The problem is that every once in a while the wireless connection gets dropped, and gets reestablished a while later. At times, this happens very frequently. I have been able to figure out that the reason that the connection is dropped is due to a HW rfkill. The 'rfkill list' command produces the following output following the connection getting dropped:
Code:
0:phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
'Hard blocked: no' is printed whenever the connection is up and running. The laptop does in fact have a physical killswitch located behind it and needless to say turning it off also produces the same result. However, the loop of the connection getting dropped and reestablished happens even in the absence of physical contact altogether, so it can't be that a slight wobble is being misinterpreted as the killswitch has been triggered or anything.
I have a nasty feeling that the problem may be due to a physical problem - but I want to exhaust all other alternatives before I go digging into the box. Even if it is not fixable, perhaps there may be a way to override the problem somehow. I am posting a section from my daemon.log that spans a single rfkill loop below.
[Code]...
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May 24, 2010
I'm running a fresh 10.04 x86-64 on a thinkpad w500, using the default video driver. The monitor shuts off randomly, sometimes while I'm using it and requires me to trigger sleep mode and waking up to bring back the screen. When it shuts off, everything else seems to be running. (i.e. its not going to sleep) I've turned off screensaver, sleep, hibernation and installed the Caffeine util to no avail.
pm-suspend.log: http://pastebin.org/273444
pm-powersave.log: http://pastebin.org/273445
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Dec 18, 2010
I am having a problem. I am running Ubuntu 10.04 on a Sony Vaio FW series. It has Nvidia graphics that I don't think the OS is taking advantage of, whatever. It also came with 64-bit Windows, it's a 32-bit OS, and again, as far as I have been concerned, whatever. It's been functioning fine for the half a year since I installed it.
Until recently. My computer has been freezing. What happened first is that the screen randomly whited out, fading in splotches to black and then back to white. This freaked me out, but restarting seemed to smooth things out. Then windows in the OS wouldn't resize, then Flash videos would freeze the OS up, repeating the 2 seconds of sound it last played. Over and over again. In a loop. On a white screen. Sometimes with vertical stripes.
This all happens inconsistently, and whenever I restart it's fine again. I just want to know if there's a deeper issue so that I can resolve it. Otherwise I have been completely satisfied, as a previous Windows and OSX user who is computer-competent within a GUI.
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Feb 19, 2011
Iv'e tried on both CD & USB. Upon Live Boot from the CD I get the first purple screen, then "No Input Signal" on my monitor. Upon Live Boot from USB I've choosen both the Install & Boot options, then It thinks for a minute; and I recieve "No Input Signal". I'm leaning toward it being my "Graphics Card"(NOTHING IS WRONG WITH IT OR ANY OF MY HARDWARE!!!!; but it is an "ATI" ^_^), but thats just a guess. Iv'e Tried Both 32/64 Here Is My Hardware Information... (Everything is Brand New & Full Diagnostics)
Intel Core i7 950
MSI Big Bang-XPower (MS-7666)
DDR3 1333 gSkill Ram (6 x 1gb)
ATI Sapphire Radeon HD 5870 (2 gb Memory, GDDR5)
HANNspree 28" Monitor 1920x1200
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May 1, 2010
I tried to install Ubuntu 10.04 amd64 version on desktop. I created the usb boot disk using usb-creator, and booted using that usb drive. About 5 seconds after booting from the usb drive, my LCD monitor shows "No Signal", and stayed blank afterwards. I had to push the "reset" button to reboot. It's definitely not the problem of my usb drive, because I had successfully used it in my laptop. I believe this is a bug of the Ubuntu 10.04 installer, which somehow doesn't get along with my desktop hardware.
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Mar 18, 2011
I was trying to boot Ubuntu 10.10 from aand it was going okay at first (gave me a 'loading' screen) and then everything went black and my monitor said it couldn't get a signal. I tried Fedora 14 and got the same problem.hat's going on? I figure it's trying to set itself to a resolution my monitor doesn't support. My GFX card is an NVIDIA FX 5200.
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