Change X refresh rate on Geforce 4MX/32MB with Compaq S710 crt monitor
Good day,
I have a server running Mandrake 9.0, and apart from some minor unconfigured stuff I have one slightly cosmetic problem: the default refresh rate for my monitor was chosen to be 85hz which is throwing off the image on my monitor, it doesn't like to be set 1024x768 @ 85hz. So I need it changed to 75hz, so the image doesn't shrink and jump to the right on screen. I have tried editing the XF86Config files without positive results. I might have also botched up those files' permissions in the same process, although I tried to correct that. steps I took: service dm stop edit XF86Config / XF86Config-4 to contain an (what I thought to be) apppropriate modeline for the Compaq S710 color monitor, set at 1024x768 @ 75hz refresh rate save file, exit service dm start, and I get tossed into the login manager and start X image still shrunk and shifted rebooted, image still shrunk and shifted. I've obviously missed something here, I thought the settings would either reside in XF86Config or XF86Config-4 (probably the latter) but I couldn't get it to change, so there's something missing. Any thoughts? Thanks in advance and have a nice day. |
um i have mandrake 10 so :S
is there KDE>configuration>KDE>hardware>DISPLAY & RESOLUTION. use these settings (i dont like using monitor from list) select custom monitor Quote:
If there isnt anything similar in 9 Make sure you arent running X if you edit XF86config file it doesnt seem to change it when i use X to edit it run it from init 3 #vi /etc/X11/XF86config-4 I found my monitor on the list but it doesnt work as well as it does just using plain generic or CUSTOM *note if you run "KDE>configuration>KDE>hardware>DISPLAY & RESOLUTION." it adds a program to the dock which right click and you can change the refresh rate :) |
I'll try the custom monitor settings, however I remember I messed up X that way
when I did the first install on this machine.. there's no monitor refresh rate setting you can access from X anywhere in 9.0 like you can in 10.x where you have that nice applet and can just click on it. Thanks for finding the monitor sync specs, I had a hard time locating those. Finally, how do I make sure X isn't running? at install I didn't set X to start at boot so I assume it isn't running when the machine is booted, and I edited the config files without X yet nothing changed. Can I pass init 3 to the (boot) prompt? |
Just boot normal and if x (KDE, gnome whatever you use) load your probably at INIT 5
(runlevel 5) just use a console ctrl+ALT+F1 login and type init 3 #you are now at runlevel 3 edit your XF86config-4 file Quote:
Remember too if in the extreme case you end up with a resolution that put scramble jargon on the screeen CTRL+ALT+ (+ on numpad) will cycle through resolutions |
This actually might be the easiest solution
do you have the mandrake install cds still? well the first one reboot your computer boot the cd to install it choose "update to Mandrake 9.2" follow the prompts it won't ask to format or anything you wont lose files it rebuilds you hardware settings and lets you choose your hardware as you did when you first installed linux. If you get stuck and cant get into KDE remember lynx is available from command line |
Thanks for the many replies.
Yes, I have the official cd's, but i'm not going to risk breaking my server install right now. My server doesn't have X at boot, i'm left with a login prompt as this is more resource friendly, if I want X I usually start it later when i'm logged in by using startx. I've tried altering the monitor section of XF86Config-4 with the monitor sync specifications you found but this doesn't change anything at all, in fact, these are similar values like XFree inserted when I selected the monitor from the list. If I define a custom monitor, I still do not have the option to choose a refresh rate, instead it again asks for the sync specifications and chooses to use 85Hz as the default refresh rate, with predictable results. (I simply do not see how I can force it to use 75Hz in the config file right now) I really need to force Xfree to _not_ default to 85Hz, it has to be 75Hz when the screen is set to 1024x768 pixels. |
Problem solved, I now have an LCD Flatpanel. (Bit drastic, but hey it works ;) )
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