LinuxQuestions.org - Adjusting refresh rate?

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Adjusting refresh rate?

My refresh rate seems to be locked at 61 Hz and I can't adjust it to something I prefer (80-85 Hz). Can someone tell me how to resolve this minor issue?

Are you sure your current resolution supports that refresh rate? Also check the depth.

Hmm, well, every time I try adjusting the resolution to something lower than 1024x768 my display goes crazy. What do you mean by "Depth"?

If you want to pull off a 1024x768 resolution with a refresh rate of 85, you must specify that in the monitor section of your xorg.conf. First open a shell, and type the following command..

Code:

gtf 1024 768 85

Then simply copy the output, and paste it in the monitor section of your xorg.conf, and then you should be able to switch to that resolution and refresh rate in whatever WM you are using. I hope this helps.

I'm stiil new to Linux, so bear with me. I've located the xorg.cfg, but I'm still not sure where exactly to paste the output frome that command. I don't see anything along the lines of "Monitor" or "Display" within it. If you could be a little more specific, I would greatly appreciate it.

Everything in xorg.conf is divided by sections, and each section is usually commented with #. Look for something like Monitor section. Try using pico , and hit ctrl+w which is a shortcut to search through the file, and type in monitor section , or simply monitor, and it should pull you to that section. If you are not comfortable with pico, because it is text base, try running KWrite, that is, if you are using KDE as your DE (Desktop Environment) , or use whatever text editor(gui based editor) that you are comfortable with

OK, upon closer examination, I noticed I was in xorg.CFG not xorg.CONF. I have located the monitor section.

# **********************************************************************
# Monitor section
# **********************************************************************

Where exactly do I paste the output?

Place it after the VertRefresh 50-130 (note, this is from my xorg.conf, yours may have different values for VertRefresh... So, you should have something like this

Code:

# **********************************************************************

# Monitor section

# **********************************************************************



# Any number of monitor sections may be present



Section "Monitor"



    Identifier  "GatewayVX700"



# HorizSync is in kHz unless units are specified.

# HorizSync may be a comma separated list of discrete values, or a

# comma separated list of ranges of values.

# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S

# USER MANUAL FOR THE CORRECT NUMBERS.



    HorizSync  30-86



#    HorizSync        30-64        # multisync

#    HorizSync        31.5, 35.2    # multiple fixed sync frequencies

#    HorizSync        15-25, 30-50  # multiple ranges of sync frequencies



# VertRefresh is in Hz unless units are specified.

# VertRefresh may be a comma separated list of discrete values, or a

# comma separated list of ranges of values.

# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S

# USER MANUAL FOR THE CORRECT NUMBERS.



    VertRefresh 50-130



#1024x768 @ 100.00 Hz (GTF) hsync: 81.40 kHz; pclk: 113.31 MHz

Modeline "1024x768_100.0"  113.31  1024 1096 1208 1392  768 769 772 814  -HSync +Vsync



EndSection

note: DO NOT COPY MY INPUT!!! It is specifically for my monitor, and it may damage yours, because your monitor may not support 1024x768 @ 100Hz, but this is where you place the results of the gtf command, after the VertRefresh

This doesent seem to work. :/ I go into my Screen Resolution Preferances and 61Hz is the only refresh rate there. Thanks for your help anyway.

Go back into your xorg.conf and to the monitor section again. Perhaps during the setup with xorgsetup, you did not specify the correct Horizontal and Vertical refresh rates for your own monitor. If you do not know them, check the manual for your monitor, or check online if you do not have the manual

OK I figured it out. I ran xorgconfig and set everything up, then pico /etc/X11/xorg.conf to verify everything was correct. Thank you for your help and for putting up with my noobishness.

actually me to asked this question earlier and didnt get answer
i cant type gtf as root but as a normal user i could, i pasted the result and restart X
still showing 71 (this was my original rate-it is ok for me but i asked it for other machine:) which is showing 61 only)

any way thank you for the suggestion a new one ;)