Upgraded monitor without changing refresh rates

Posted on 2005-03-12
Medium Priority
Last Modified: 2013-12-15
Hey all, I have a problem here.  I'm running Fedora Core 2 (don't laugh at me :P), and I upgraded from a CRT monitor running at 85 hertz refresh, to an LCD (Sony SDMHS74-P) monitor that has a maximum refresh of 75 hertz.  The problem is, whenever it goes into the login screen, of course my monitor cuts out because it wants to try displaying at 85 hertz and it's out of the range of this particular monitor.

I tried "upgrading" my Fedora installation with the disks, hoping it would detect that change and modify it, but it didn't do a thing.  How can I tell Linux that my monitor is no longer a CRT 17 inch but an LCD 17 inch with different refresh rates necessarry?
Question by:Jezuit
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
LVL 40

Accepted Solution

jlevie earned 375 total points
ID: 13526338
The first thing to try is to log in as root an an alternate console (Ctrl-Alt-F2)  and use system-config-display to set up X for this monitor. That should work, but in some cases the monitor may not work when presented with an out of range signal from X.

If you can't get into an alternate console  because the display is locked up you'll need to boot into single user mode by appending " single" (note the leading space) to the kernel spec on the Grub boot screen. Then execute 'telinit 3' (or edit /etc/inittab and set "id:3:initdefault:") and reboot. The system will then come up in text mode and you can set up X. From text mode you can start the Desktop with 'startx' to make sure it works. Then if you want, you can revert to the Gui login by executing 'telinit 5'  (or edit /etc/inittab and set "id:5:initdefault:")

Author Comment

ID: 13526680
Ctrl+Alt+F2 worked actually, and was allowing me to login in text mode.  I logged in as root and started up 'system-config-display' at which point it promptly went back to having an out of range signal.  When you say 'The system will then come up in text mode and you can set up X'... how will I proceed to actually set up X at that point?

Author Comment

ID: 13526876
Never mind.  I was able to change the xorg.conf file (which I had to read up about, I had no clue about it :P), and set the refresh rates manually for my monitor.  Thanks for the help.
LVL 40

Expert Comment

ID: 13527230
Sometimes the approach you used (editing xorg.conf) is the only way to get things working.

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Network Interface Card (NIC) bonding, also known as link aggregation, NIC teaming and trunking, is an important concept to understand and implement in any environment where high availability is of concern. Using this feature, a server administrator …
Google Drive is extremely cheap offsite storage, and it's even possible to get extra storage for free for two years.  You can use the free account 15GB, and if you have an Android device..when you install Google Drive for the first time it will give…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
Suggested Courses
Course of the Month9 days, 11 hours left to enroll

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question