Change refresh rate on fedora
 

How do I change my screen refresh rate on my fedora7?

From GUI

Administration or system --> Display in KDE

fedora7 is too old ...move to Fedora10

I tried that but I can't get the refresh rate to go lower.
how do I change horizontal and vertical refresh?

Why would you want to lower the refresh rate?

I'm using an old monitor and if the rate is too high left edge of my screen gets cut off, only solution is to lower the rate a little.

That should not be your refresh rate. It should be your resolution. Video cards also only have a fixed window of refresh rates that they can operate in.

Fixed it!
I just added

HorizSync 31.5 -50.0
VertRefresh 40-90

to /etc/X11/xorg.conf
yeah you are right I could also lower my resolution
or keep it the same and lower the refresh rate.

Be aware that operating a monitor outside its normal refresh rates will damage the monitor.

ok ( I didn't know that ) thanks for the tip, I will check if I'm still in correct range.

Post output of

#lspci

and your /etc/X11/xorg.conf

Usually hsync and vsync are auto detected (you will find them in the manual/monitor website too). If they are not, use modelines as well

Here you go.

# lspci
00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated Graphics Controller (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
01:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

check if i810 is in your driver.

see lsmod

or /etc/X11/xorg.conf