Red Hat / Fedora :: Forcing Screen Resolution When Monitor Type Not Detected
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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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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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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Aug 28, 2009
I installed FC11 on my laptop T43 and the video card is ATI Mobility Radeon x300. Now I have a problem of screen resolution with external monitor:
When I do presentation, I have to mirror the two monitors and both set to 1024*768, which is not perfect.
I remember that when I use RHEL 5 desktop edition, The system can automatically detect the external monitor and set it by itself ----- The laptop uses 1400*1050 and the external monitors such as projector uses 1024*768. But I haven't found such feature on FC11.
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May 13, 2010
First off, let me say: I'm a long time Linux hobbyist and recently installed Fedora 12. I've been looking (some say "lurking") around these forums for a bit after I loaded it up and let me say: Leigh, You're an amazing young man! Keep up the great work! I've a question: I've just put together a hobby computer: Pentuim 4, with 1 Gig of RAM and a Nvidia Geforce5700LE. When I install Fedora from a fresh install, everything works great: nice screen resolution, good graphics, etc. but no 3d or acceleration, so I'm very limited on my programs.
So I decided I need to upgrade my Nvidia driver. I followed Leigh's Nvidia setup guide after installing Fedora 12 (all four steps!) everything seemed to go fine, but when I reboot, I quickly see the Nvidia splash screen, but the screen then goes blank. Well, not really blank, I can see what appears to be a kind of cross-hatch pattern, plus I can see what should be my mouse cursor on screen (it also is a square shaped pattern). I suspect it may be at a screen resolution that my monitor doesn't support. Once there, the computer pretty much doesn't do anything else. Usually I can break into the x driver loading and go to the command prompt, but this latest time I can't even do that.
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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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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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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 11, 2010
so when ppl bring me their computer and i install them ubuntu in my monitor when they take their computer to their home ubuntu does not keep the screen resolution i set for them.
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Nov 2, 2010
I have a old Pentium III box with equally old monitor (It says LG Sutdioworks 45v).I have installed Ubuntu 10.04 LTS.I have found it difficult to setup my screen resolution. It shows by default 800x600.After some tweaking I can stretch upto 832x624.I have seen resolution up to 1024x768 in windows on the same box and same monitor.How can I improve the resolution?I have searched and found out that i need a xorg.conf setup as Ubuntu cant identify my monitor properly.I also installed ddcprobe, read-edid.However I have met with limited success.
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Nov 10, 2010
I need to know how to change resolution on the screen and monitor
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Nov 14, 2010
I cannot get the monitor screen resolution to anything but 1920 x 1440 (4:3).
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Jul 25, 2010
I am new to Linux (Ubuntu 10.4 LTS on a Thinkpad T40), now just two days, and had everything working nicely. But since I wanted a better higher resolution I tried to set the monitor resolution to a higher value. After selecting a higher resolution first the screen went black and now it has a white background and is steady but has flickering areas. The system is still working. How can I go back to the resolution that was working?
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Aug 19, 2010
I changed may graphic card, earlier I used NVIDIA FX5500 with nvidia driver, now I was trying to use ATI Radeon 7500, but there are problems with graphic configuration. At first attempt server started but after I changed a screen resolution the monitor went blank. I restarted a computer but after the X server started immediately the monitor wnet blank. I found that for completely for me unknown reasons Xorg was trying to use an NVIDIA glx module with radeon driver. I removed this nvidia driver, I expected ubuntu would be able automatically to set up a proper configuration, but instead of ubuntu complained about a missing driver. I also tried manually to set up some basic config using Xorg -configure but after that the Xorg server was stuck.
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Jan 27, 2010
I am running Ubuntu 9.10 on a new HP PC (Pavilion p6240f PC).This came with an Intel GMX X4500 Integrated graphics.My monitor is Samsung SyncMaster 2333. Initially I got a very bad resolution, Later I edited /etc/X11/xorg.conf (created the file) and added the following.
Section "Monitor"
Identifier "Generic Monitor"
HorizSync 30 - 75
VertRefresh56 - 61
EndSection
[code]....
With both 1600 x 1200 and 1680 x 1080 I get the resolution but I see lots of shadowing.(The letters are not crisp) Do I need to upgrade any driver ?
~$ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
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Apr 22, 2011
I have a dell studio hybrid PC which I am hooking up to my TCL brand 40" LCD TV to use as a media center pc. The problem I am having is that I can't get the TV's native 1920x1080 resolution to display properly. The rendered desktop doesn't quite fit in the screen (I think its the top and bottom edges that are cut off) so for example the menu bar at the top is completely off the screen.
1680x1050 works fine in the sense that it fits the full desktop to the screen size, but its not the native res. In the resolution changer utility, it recognizes that my TV is a TCL brand but mentions 36 in the model name (the TV I have has 40 in the model name to denote 40") so I think Ubuntu is recognizing the wrong size TV. How can I finagle the screen settings to make the 1920x1080 fit properly on my monitor? Or get Ubuntu to correctly recognize my TV? My TV is a no-name brand so its hard to find info on it or others setting up linux with it.
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Jun 7, 2011
I've been working on this off and on for the last couple of days and I can't seem to get this working. I'm using the latest Catalyst Control Center (11.5) and I've also got xorg.conf set up for this resolution. If I switch the driver in xorg.conf to radeon from fglrx, I can get my 1920x1080 resolution (only on GNOME;the login screen and Fluxbox have a black bar on the left that cuts off about a quarter of the screen). When using fglrx and Catalyst Control Center, I can only get a maximum resolution of 1600x1200.
Xorg.conf:
Section "ServerLayout"
Identifier "Manual Layout"
Screen "Screen-0" 0 0
[Code]...
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Nov 14, 2010
on a 6-7 years old compaq laptop, connected to a brand new hp monitor i am having a mismatch with computer/monitor resolution.
before i had ubuntu 10.04 which could only run in x's safe graphics mode - allowing for full screen resolution but with handicapped graphics - for example videos fullscreen would be quirky and run with cpu at 100%, something which was no problem before 10.04.
then i tried ubuntu 10.10 and later lubuntu 10.10 (which had exactly the same problem); the monitor is running 1440x900 while the computer is rendering to only 1024x768 - leaving a huge black border on right and bottom of screen. the gfx is still crippled; videos fullscreen is quirky as before.
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Sep 9, 2010
I recently purchased a cheap computer to use for everyday tasks. It came pre-loaded with Windows 7. The monitor I am using is a Vizio VX20L. It's native resolution is 1366X768. I have no problem with the screen resolution in Windows 7 but in Ubuntu, I am having some issues. I have the propriatary Nvidia driver installed in Ubuntu but for some reason I cannot get the screen resolution right. I am currently using a resolution of 1360x768 and the right part of my desktop is not on the screen.
I have tried to adjust the screen size using the monitor settings, but I still cannot get the whole screen to show up. If I set the resolution to Auto in the NVIDIA X Server Settings, it defaults to 1280X1024 and I can see my whole desktop, but it is streeeeetched. Here is some relevant information pertaining to my system:
I'm using Ubuntu 10.04
Integrated Video chip is NVIDIA GeForce 6150SE
The driver I'm using is NVIDIA accelerated graphic driver (version current)[Recommended]
screen is a Vizio VX20LHD
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Sep 24, 2010
I have Ubuntu (running Jolicloud) on my HP dv2000 laptop, connected to my Sony AV Receiver through HDMI to use the TV as an external monitor. However, the resolution seems to be slightly off as the outer edges of the screen are cut off. Is there a way to fix this by editing the xorg.conf file? My current setup is below. I tried adding the line "Virtual 1244 700" to the subsection "display", but when I restarted it threw me into low graphics mode. Is there anything else I can try?
I also tried setting up the resolution at 1920x1080 on the TV and kept the default resolution on the monitor as 1280x800, and as you would expect displays the entire desktop in a smaller version on part of the tv. However, the desktop is still offset, leaving the top and left margins cut off. So, perhaps I need a way to offset the screen? Is this possible in xorg.conf?
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Jan 15, 2010
I have a cheap usb kvm that doesn't pass the EDID data back to the computer from the monitor. And now Fedora 12 seems to rely on autodetection of the monitor to start up at the proper resolution. When I have my samsung 712N on the kvm, fedora 12 boots to only 800x600 max resolution. If I connect the monitor directly to the computer video card, fedora sets the screen resolution to the desired 1280x1024 properly.
When booted through the kvm, fedora won't let me detect or select the correct monitor, and I haven't found any way to work around the problem other than pulling the monitor off the cable, connect to the cpu, reboot. After it's booted I can reconnect the monitor to the kvm and the video is fine.
My question is does anyone know how to manually tell Fedora 12 at startup what kind of monitor I'm using and skip the bootup monitor detection? So far I've spent a couple unproductive hours with google to discover this isn't a totally uncommon problem and no site I've found seems to have any solution.
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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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Aug 7, 2011
I am having problems getting my external monitor to work. When I plug in the monitor, both the laptop screen and the external monitor go black. When I unplug the monitor, the laptop screen works again.
When I startup with the external monitor plugged in, neither screen works or teh computer hangs or something.
I have had the external monitor going on a couple of occasions. I did manage to configure my monitors through System Settings > Display. I turned off the laptop monitor as I just want to use the external. But after rebooting, things didn't work.
I have a Thinkpad E420, Fedora 15
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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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Nov 5, 2010
I have a 22'' monitor. And I would like to set resolution to 1280*800. This is the resolution set in Windows in my computer in another disk partition. So I dont understand why I can't do the same in Fedora 13. The default resolution is 1680*1050, but everything looks too small. Other options I can choose are uselesnes because it distort everything.
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Oct 1, 2010
It seems that whenever I boot my laptop (hp probook 6450b) without a monitor attached, then boot with a monitor later attached, the configuration gets all messed up.
Currently, if I boot with the monitor attached, right after the blue loading screen (at the login prompt) i get two black monitors and a mouse, with no login screen. Unplugging the monitor shows the login screen on the laptop.
If i boot without the monitor attached, log in, then plug it in, i see the following from xrandr:
Code:
Screen 0: minimum 320 x 200, current 2390 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
1366x768 59.6*+
1024x768 60.0
[Code]....
However, now when I reboot, all settings are lost, and if the monitor is attached, i get the black screen with a mouse at login.
I did notice that when I shutdown, it hangs on "Running guests on default URI", and i get a stack trace. It will keep dumping stack traces, and i have to hold down the power button to force it off.
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Nov 14, 2010
problem happens after installing nvidia driver.everything was fine.the nvidia driver has been detected and functioning correctly.but my monitor,acer x173w which can go for maximum resolution of 1440x990 but i'm still using 1024x768.
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Oct 27, 2009
I am trying to install Fedora 11, but the monitor that I am using is only 640x480. When the window comes up to start the install, I cannot see any of the buttons or tabs for selecting the items. How can I adjust the resolution so that I can see the entire image in my screen?
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Feb 27, 2011
I have a HPL2045W LCD monitor connected to my Fedora 14 PC through a Belkin KVM switch. On Fedora 12, the screen resolution (upto 1680x1050) was correctly recognised, but in Fedora 14, the best I can get is 1024x768. How do I correct this obvious error?My graphics card is an ATI Radeon RV2600 which has worked flawlessly for several years, until this version of Fedora.
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Mar 30, 2011
I'm a new Fedora/Linux user and I've just setup my first laptop to use Fedora 14. However, I've come across an issue and I've done a lot of searching on various forums etc and basically I'm going around in circles. I've had my PC hang already after I tried to create a xorg.conf file. I have since removed the changes I made.
I have a a SIS 771/671 PCIE VIA Display Adapter (rev 10). I got this info via the lspci command. The problem I have is that it's not letting me select a resolution above 1024 * 768. I know it has higher resolutions as when it was a Windows XP and Vista PC I had higher resolutions. There has to be an easier way to set a screen resolution that manually editing cryptic files and knowing refresh rates etc.
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