Ubuntu :: Monitor Not Detected - 640x480 At Startup?
Jul 11, 2010
My Ubuntu server box, has a Iiyama prolite LCD, 22", 1680x1050, that had not problem at all since... I can remember. Since yesterday, after a restart, xserver started in 640x480, with only 320x240 as alternative.
I have latest nVidia drivers installed, and the main difference with last week, is that now, Display Configuration says CRT-1, unknown instead of Iiyama.
I've tried.
1. Uninstall xserver and reinstall.
2. dpkg reconfigure
3. Uninstall nVidia and come back to original Nouveau.
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Apr 27, 2010
I use slackware 13.0 64bit and VGA EN9400GT, I have two monitor samsung that is: SNX(CRT-0) && 943SNX(CRT-1) series, i had try setting it in nvidia X server settings but the resolution as CRT-1 only have 2 options that is: 640x480 & 320x240. this is my xorg.conf # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 1.0 (buildmeister@builder58) Fri Mar 12 02:13:46 PST 2010
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Jan 23, 2010
I have a fujitsu siemens monitor C776 (built by Hansol E17CL)
FC12 can't autodetect it
If I go system -> preferences -> display the button: detect monitor does not work
I can't change resolution which is stopped at 640x480:
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Aug 17, 2011
My software and hardware information are as follows. I have Fedora 12 and KDE 4.4.5 installed on a Dell Vostro 1500 laptop. I believe it's a 64 bit processor; it's an Intel Core 2 Duo CPU. The external monitor is a Dell as well.
My problem is that my system does not seem to be detecting an external monitor that I have connected. Everything else is working just fine; however, I would like to have the option of attaching an external monitor. When I plug the external monitor into the laptop, the external monitor remains black and appears to be in power save mode. The results of xrandr -q (with or without the external monitor attached: it doesn't appear to change) are as follows.
Code:
How can I get my laptop to recognize that the external monitor is even connected? Let me know if I can be more specific or provide additional details.
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Oct 28, 2010
I just upgraded, and when I rebooted I could see that it was booting but after the initial phase I got a blank screen.
I went to prompt and tried xrandr to which I got the error : Can't open display.
What does that mean, and how do I fix this? I guess that my monitor is not properly identified or is not identified at all.
Does anyone know what I can do?
Went to /etc/gdm to find xorg.conf but it is not there. In etc/X11 I have an xorg.conf
The contents are :
Section "Monitor"
Identifier "Configured Monitor"
EndSection
Section "Screen"
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Jun 1, 2010
So I have a Samsung monitor at work (model 2343BWX) that I use in addition to my laptop screen. My computer is a T500 think pad. When I boot into ubuntu 10.04 from previously shutting down the computer in ubuntu I can't detect the monitor. If I however boot first into windows (I don't even have to enter my password, I can just press shutdown on the menu instead of logging in, and then boot into ubuntu) and it auto detects the monitor.
I have tried going to System -> Preferences Monitors and clicking "Detect Monitors" it doesn't work. Anyone know how this could be?
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Jul 7, 2010
I have installed (successfully) Ubuntu 10.04 ppc on my powerpc g4 mac. 400mhz, 1g ram. Its the blue model. It works great, but it does not detect my monitor, and I can not change the settings past 800 X 600. I am using a Dell 19 inch monitor. Analog input (not DVI yet) resolution 12080 x 1024 60hz. I believe I need to change the info in the xconfig file (but I don't know to what or how), and I may not be saying that correctly.
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Oct 31, 2010
I'm running 10.04 as a DVR (mythtv). If the computer boots with the TV off it won't detect the settings, and when I turn the TV on nothing displays. I have to ssh into the computer and reboot it to get it to detect the display.Any idea how I can go about solving this? How can I disable autodetect and force it to use a specific setting?
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Feb 19, 2009
I install the debian on my PC, but the monitor is not detected or not adapted ( while it is for linux CD live, and windows XP). it gives the following errors :
I want to use the file xorg.conf given by CDlive ( sidux for example) and copy it in the /etc/X11 of my debian, is it enougn or I need ohter configuration ?
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Sep 29, 2015
Today I set up the energy settings like that:
10 minutes (screen), 20 minutes for suspension.
After around 30 minutes, I came back and switched back on the pc.
The primary monitor (VGA) was not detected, even after a system reboot.
More info about my pc:
Debian stable 8.2, kernel 3.16.0-4-686-pae.
I have an Nvidia card, but currently I am using nouveau drivers.
Two monitors: VGA (primary) and DVI (secondary).
Later I could get my primary monitor to work by switching tty (ctrl+alt+f3 and typing "startx" in the console).
I guess this is related to Xorg configuration (/etc/X11/xorg.conf is empty), but I am not really sure.
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Dec 14, 2010
I have a ViewSonic (VA1703w) LCD and Fedora 14 is not detecting it. I want to change the resolution but it is fixed to 1024x768. I have also tried to add the resolution in xorg.conf but no effect.
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Nov 13, 2015
I noticed that Debian 8 has a significant bug related to detecting presence of display(s). Today, I woke my computer from sleep while the LCD monitor was unplugged from power (the monitor is connected via DVI) then I powered the monitor but nothing was displayed. Next, I connected another monitor via HDMI and both screens started working. However after disconnecting HDMI cable from the second monitor the first one with DVI stopped showing anything. The conclusion of this situation is that HDMI monitor must be connected all the time.
I thought that this is caused by graphics driver, but I experienced the problem on different machines, one with nvidia driver and DVI, and the second with default free driver and DisplayPort.
I just checked that this is related to KDE. After switching to console using ctrl+alt+f1 the screen turns on, but when I am going back via ctrl+alt+f7 the screen disappears.
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Aug 16, 2015
Setup:
I'm using i386 Jessie Debian, have an i7 Intel processor and Gtx 745 4gb NVidia GPU.
I am running with nomodeset due to blurring issue but issue occured without nomodeset too.
Problem:
When I start Debian with just a monitor in the HDMI slot it doesn't recognize the monitor and keeps the monitor at 1024x768.
When I start Debian with monitor in both DVI and HDMI slot it only activates the DVI monitor (with proper resolution). PC has no VGA I have no DP cable.
xrandr:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1920 x 1080, maximum 1920 x 1080
default connected primary 1920x1080+0+0 0mm x 0mm
1920x1080 0.00*
1280x1024 0.00
1024x768 0.00
800x600 0.00
640x480 0.00
Which is my dvi monitor, no other screens detected. Is there any way to get the HDMI to run properly?
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Oct 20, 2015
My system can't seem to detect the external monitor that I've plugged into my laptop using and HDMI cable. The monitor works when I'm booted into Windows so I know that it isn't a problem with the monitor or the cable.
When I run xrandr I get.
Code: Select allScreen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
LVDS1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
1600x900 60.00*+ 39.99
1440x900 59.89
1360x768 59.80 59.96
1152x864 60.00
1024x768 60.00
800x600 60.32 56.25
640x480 59.94
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
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Jul 30, 2015
I've recently installed Debian v8.1 and installed Nvidia driver 340.46. In nvidia-settings I am able to enable my second monitor and enable it/set it's position..etc. My second monitor is not being detected in Debian Display and is 'on' but only showing a black screen. I've tried researching and implementing various 'fixes', but I'm not having any luck.
I'm running dual GTX 570's with a monitor plugged into one each (DVI). I noticed in my xorg.conf under Section "Screen" I have an option "MultiGPU" "Off"; would this be part of the issue?
I've tried:
- purging all nvidia drivers and re-installing
- installing different versions of nvidia drivers
- add nomodeset in grub
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Jul 26, 2011
Today my desktop reverted to 1024x768 resolution immediately after init. I tried changing it back but only 1024x768 and 800x600 are listed as supported in the display settings, even though my monitor supports resolutions of up to 1360x768. Rebooting the system did not solve the problem.I'm running Fedora 15 x86_64 on kernel 2.6.38.8-35 with the proprietary nvidia drivers of version 275.09.07. My monitor is a Samsung SyncMaster 933n. nvidia-settings is apparently not detecting it correctly, it thinks I'm using a CRT monitor.I was actually in this exact same situation a few months back, but it kind of went away on its own, so I didn't mind too much. So, what could be causing this, and what can I do?
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Aug 20, 2010
I haven't manually configured XWindows in a very long time, so I'm not very certain what I need to do anymore. Hopefully someone can provide some guidance. I just built up a new system that I'm trying to connect to a 47" LCD TV that provides a VGA connection. When the computer starts booting all of the text comes up just fine (1 or 2 characters on the left are chopped, but otherwise fine). When I tried to run the installer for CentOS5.5 I ran into a problem. The monitor(TV) wasn't getting a proper signal to display XWindows. In an effort to keep going, I reconnected the PC to an old monitor and did the install from there. That worked no problem. I ran all the latest updates hoping that maybe this was fixed in a patch. I then shutdown and reconnected to my TV. no luck. When it starts XWindows the screen doesn't display anything. I've tried fooling around with modifying the xorg.conf and adding an explicit "Monitor" section and set it to 640x480 with a VertRefresh of 60 (which is supposedly an acceptable format), but no luck. Can anyone provide any guidance on how to solve this problem. BTW I do know that the VGA connector on the TV works just fine because I can hook up my laptop (Windows XP) to it.
H/W Monitor: Olevia 747i (when nVidia on my laptop detects it, it is reported as 747-b11) Motherboard: Biostar MCP6PB M2+ Motherboard - Socket AM2+, �ATX, Audio, GeForce 6150 Graphics, SATA, RAID Graphics: Using the integrated GeForce 6150 chipset
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Oct 6, 2010
Installed fedora 13 to hard drive on fresh partition,installed ok,ran updater,installed all updates.all working ok but fedora is not able to detect my laptop monitor.i am unable to increase resolution.stuck on 800 * 600. when a window in open and i need to click at the bottom of the window i cant because it is bellow the screen.I went to [URL] to look for drivers.it only shows display drivers for red hat 7.0.i tried them but wont install.is thier drivers i can use for fedora 13,or a way to force resolution into 1024*768.
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Jan 18, 2010
OS: Fedora 12
Video card: ATI Radeon 9200 series
Monitor: ViewSonic 19"
I installed Fedora 12 configured Gnome automatically. Generally default settings. My monitor was connected directly to the video card and all was good. My video card was detected and my monitor was detected as ViewSonic Corporation 19" and I can set the screen resolution to 1280x1024. I had no xorg.conf file, as it seems that Fedora 12 does a great job of PnP to just set everything up.Now I go and complicate things by hooking up my monitor through a KVM switch. All of a sudden my monitor is "Unknown" and the best resolution I can achieve is 800x600.
Sure, I could go and reconnect without the KVM, but I want to be able use it.Is it possible to edit xorg.conf to tell it "Trust me, just use 1280x1024 at 60Hz even though you can't figure out what the monitor is"?
I tried a number of the posted suggestions to generate xorg.conf files but none of them get me what I need. A simple sample file listing that does the minimum is greatly appreciated (I can experiment from there once I get a basic setup working).And can someone explain if it is X or the ATI driver that is getting confused by the unknown monitor type. It helps to know what is actually going on in addition to a fix (so I can figure it out myself in the future). Thanks!
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Apr 24, 2010
My monitor flickers 3-4 times only during startup.I also get some bunch of errors before ubuntu is loaded.I cannot see those error messages because ubuntu is loaded instantly.I only get 1-2 second to read those errors(but i can't read so fast).Can i read them ? How should i stop my monitor to flicker.Also, my postcode shows 00(it used to show FF on windows 7), any ideas why ?
Also can i install any graphics driver ? I read something somewhere and all i have is -
Code:
I'm on Ubuntu 10.04 LTS - the Lucid Lynx.
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Jan 24, 2011
I have followed this post: http://ubuntuforums.org/showthread.p...lay+resolution And when I restart it goes back to having the edge of my window (scrollbar) cut off. I added the increase_resolution.sh to my startup menu but I guess I don't know the command to MAKE it start at startup. (That is what "command" means in the "Edit startup program" menu, correct?) If I go into usr/local/bin and click run it works, but if I can execute it automatically, that would be great.
Also, I have added an account(?) for my daughter and when she is finished and I try to log her out the display goes nuts and does not correct itself. I assume it has to do with this since when I restart the machine (and the script isn't running) the picture is fine again. Is there a conflict between the two accounts and this script? I'm sorry if this is not making sense, I know what I want to say, but don't have the lingo/jargon down.
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May 4, 2011
I started using Ubuntu 11.04 today.
Everything works fine with my monitor directly connected to the computer. I get a default screen resoluton of 1600 x 1280, which is just fine.
However, when I connect the screen through a video splitter to be able to use a beamer, the screen resolution defaults to 1024x768. Moreover, Ubuntu then detects an unknown monitor.
I recall that I have solved this problem before with an older version of Ubuntu.
Now it seems that there is no xorg.conf anymore so I don't know what to do.
How can I force Ubuntu 11.04 to start with a screen resololution of 1600 x 1280.
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Oct 11, 2010
I installed a new copy of F13 this morning on my fairly new laptop.32 Bit Intel, 3GB Memory 120GB HDD. The problem I've got is that my Monitor/Graphics card is not getting detected and as a result I'm getting a horrible Resolution/Refresh rate. When I run
lspci | grep VGA
I get this 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 771/671 PCIE VGA Display Adapter (rev 10). how I can get my monitor/graphics recognized to work in the Full Resolution.
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Jun 18, 2011
I am new to Ubuntu. I installed Ubuntu 8.04 and it detected my Acer monitor AL1716 correctly and it works fine. However when I installed Ubuntu 11.04 it shows the monitor as " Unknown Monitor" and the maximum resolution is 1024x768 and I cannot set the native resolution which is much higher. My motherboard has Intel 845G chipset and built in graphics. I tried Ubuntu Software Center, but couldnot solve the problem.
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Feb 25, 2010
I have Ubuntu 9.10 installed on my computer. I also have Galaxy (Nvidia) 9500 GT PCI-E card installed on it. I can get both monitors (Acer X223w) to work but every time I shut off the computer and turn it back on the second monitor is shut off. I just need to turn it back on using Nvidia X Server Settings. I have tried to save my X configuratin file but I keep getting an error of:" Unable to remove old X config backup file '/etc/X11/xorg.conf.backup'. I have a feeling this is because I am not signed in as root. Is this correct? If this is the case is there a way to get to sign in as root not using the command lines? Otherwise they need to remove this button. I can manually create a backup (copy paste into a text file). I think. Getting back to my Xorg.conf file, I think I need to modify it to have two screens. I have also got some information on my video card using the lspci command. I think I need some information from this. I have written below (towards the bottom) what I think the file should be. Now before I do this, does anybody know of an easy way to back up my whole computer? With my luck I am about to screw something up big time. I think I can just get away with the text file that I copied from the Xorg. Worst case scenario I will just manually replace the file.
Information on my computer:
OS: Ubuntu 9.10 32bit
Motherboard: ASUS M3A78
CPU: AMD Phenom 9500 Quad Core
Video Card: Galaxy Geforce 9500 GT 1GB 128 bit DDR2 (Nvidia)
Hard Drive: Hitachi 1 TB Sata Drive 3 Gb/sec 7200 RPM
Ram: 4 GB (I think, its been awhile since I built this thing)
DVD Burner: LG
Here is a copy of my xorg.conf file: (I don't think it matters but I have both monitors turned on right now).
from the lspci | grep VGA:
I think I need the 01:00 information for my Bus ID. The only thing that I am confuse on is that I was expecting to see two of them.
Okay, this is what I think I need to do: I tried to add color to make it easier to find the changes I made but for some reason I cannot. I will add **** on the end (right side) so my additions and questions will be easier to find.
Do I need to add another Device for the video? Doesn't make sense to me since I only have one video card. I was told it should be based on the # of chips on the card. So I guess I should have two of them since I have two outputs.
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Jan 26, 2010
1 anyways this magnified desktop is killing me i don't know how to solve it and the resolution only goes up to 640x480 and i don't know wt to do !
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Jan 2, 2010
My Ubuntu can not go any higher then 640x480. I have found out what the problem is. The monitor has broken down (firmware or some thing) but still works fine in Windows. How do i know this ? Well a few mouths ago i was on Windows Me and one day it booted up saying that it is installing a default driver for the screen , so i let it do and after it did that it would never use the VA702 driver. Also the resolution could get higher then 1280x1024(this is the screens biggest res). A other mouth later i installed Windows XP and when using it i tried to install the VA702 driver but it did not work so i had to manually install it which worked but did not get correct resolutions e.g. could go higher than the monitor is meant to go. Now in Ubuntu can't go higher then 640x480. How can i fix this ?
Screen : ViewSonic VA702
Graphics Card : Winfast My Vivo A170 Geforce 4 MX 440 AGP 4x 64MB DDR
Ubuntu:9.10
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May 19, 2010
My monitor only supports 640x480 resolution, so how can I start Ubuntu's live CD at this resolution?
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May 24, 2010
Resolution won't go higher than 640x480 with a TV
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Oct 21, 2010
I had the following problem when I installed ubuntu 10.10: - my video was only able to show 640x480 and the installation was a nightmare (I started more than 10 times until I was able to finish - because right-down buttons are not visible ...) If you need more details about my hardware let me know and I can run some software to collect data about my hardware if is necessary. Basically I have a dual monitor system (one lower resolution and one with higher resolution). A nice fix will be (if possible) to not clone automatically the screen on both screens -> and to give me the option to choose the video settings (before starting the installation - and this screen to have always 640x480 ...)
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