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Old 11-29-2007, 03:34 PM   #1
Rick@rd
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Higher refresh rate!


Hi!
My monitor is an BenQ T221WA and I would like to use higher refresh rate in 1680x1050 in 75Mhz.

This is a part of my xorg.conf

Code:
Section "Screen"
        Identifier      "Default Screen"
        Device          "nVidia Corporation NV36 [GeForce FX 5700LE]"
        Monitor         "CPD-E500E"
        DefaultDepth    24
        SubSection "Display"
                Depth           1
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1680x1050" "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
EndSection
 
Old 11-29-2007, 03:41 PM   #2
tronayne
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In the Monitor section of xorg.conf, put entries like this:
Code:
Section "Monitor"
...
        HorizSync    30.0 - 85.0
        VertRefresh  50.0 - 160.0
        Option      "DPMS"
...
EndSection
Do not use these values: check your monitor manual for the correct range!
 
Old 11-30-2007, 06:46 AM   #3
Rick@rd
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Quote:
Originally Posted by tronayne View Post
In the Monitor section of xorg.conf, put entries like this:
Code:
Section "Monitor"
...
        HorizSync    30.0 - 85.0
        VertRefresh  50.0 - 160.0
        Option      "DPMS"
...
EndSection
Do not use these values: check your monitor manual for the correct range!
Thanks for your kvick answer, but it didn't solve my problem.
It looks like it always use 60Mhz when I run in 1860x1050 resolution.

I have been reading a little about modeline and tried to add this line.

Code:
Modeline "1680x1050" 207.14  1680 1784 2032 2512  1050 1050 1053 1099
from here...
http://www.bohne-lang.de/spec/linux/modeline/
Code:
 Horizontal Resolution:   1680 
  Vertical Resolution:     1050 
  Vertical Refresh Rate:   75.00 Hz 
  Horizontal Refresh Rate: 82.46 KHz 
  Dot Clock Frequence:     207.14 MHz 

 # V-freq: 75.00 Hz  // h-freq: 82.46 KHz
 Modeline "1680x1050" 207.14  1680 1784 2032 2512  1050 1050 1053 1099
I have been looking at others xorg.conf and they are using Modeline like this...

Code:
ModeLine "1400x1050_75"  155.85  1400 1496 1648 1896  1050 1051 1054 1096  -HSync +Vsync
    
    # modeline generated by gtf(1) [handled by XFdrake]
    ModeLine "1400x1050_60"  122.61  1400 1488 1640 1880  1050 1051 1054 1087  -HSync +Vsync
    
    # modeline generated by gtf(1) [handled by XFdrake]
    ModeLine "1400x1050_50"  99.88  1400 1480 1624 1848  1050 1051 1054 1081  -HSync +Vsync
Please anyone help me...
 
Old 11-30-2007, 07:01 AM   #4
pixellany
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Here's what gtf gives me:
Code:
[mherring@localhost ~]$ gtf 1680 1050 75

  # 1680x1050 @ 75.00 Hz (GTF) hsync: 82.20 kHz; pclk: 188.07 MHz
  Modeline "1680x1050_75.00"  188.07  1680 1800 1984 2288  1050 1051 1054 1096  -HSync +Vsync
One article I found suggests removing the .00 from the mode name---like so:
"1680x1050_75"

If you put the mode name into the "Display" section of xorg.conf, it should work.

If you use a modeline in the "Monitor" section, then you don't need to specify refresh rates.
 
Old 11-30-2007, 10:36 AM   #5
Rick@rd
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Quote:
Originally Posted by pixellany View Post
Here's what gtf gives me:
Code:
[mherring@localhost ~]$ gtf 1680 1050 75

  # 1680x1050 @ 75.00 Hz (GTF) hsync: 82.20 kHz; pclk: 188.07 MHz
  Modeline "1680x1050_75.00"  188.07  1680 1800 1984 2288  1050 1051 1054 1096  -HSync +Vsync
One article I found suggests removing the .00 from the mode name---like so:
"1680x1050_75"

If you put the mode name into the "Display" section of xorg.conf, it should work.

If you use a modeline in the "Monitor" section, then you don't need to specify refresh rates.
Apparently BenQ T221WA don't take higher then 60Mhz in 1680x1050 resolution. I just read that in the manual.

All I want to do is to run in highest resolution in 75Mhz

This is how my xorg.conf looks like now after that I used this cmd "dpkg-reconfigure -phigh xserver-xorg"
I added HorizSync and VertRefresh.
Code:
Section "Device"
        Identifier      "nVidia Corporation NV36 [GeForce FX 5700LE]"
        Driver          "nv"
        BusID           "PCI:1:0:0"
EndSection
Section "Monitor"
        Identifier      "BenQ T221WA"
        HorizSync       30.0 - 82.0
        VertRefresh     56.0 - 76.0
        Option          "DPMS"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "nVidia Corporation NV36 [GeForce FX 5700LE]"
        Monitor         "BenQ T221WA"
        DefaultDepth    24
        SubSection "Display"
                Depth           1
                Modes           "1680x1050" "1600x1600" "1440x1440" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"       EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1680x1050" "1600x1600" "1440x1440" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"       EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1680x1050" "1600x1600" "1440x1440" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1680x1050" "1600x1600" "1440x1440" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"      EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1680x1050" "1600x1600" "1440x1440" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"      EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1680x1050" "1600x1600" "1440x1440" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"       EndSubSection
EndSection
thanks again...
 
Old 11-30-2007, 11:07 AM   #6
tronayne
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Have you tried using the xorgsetup utility? It probes your video hardware and mouse and writes a configuration file (xorg.conf) for you (it also makes a back up of any existing xorg.conf file).

Usually, xorgsetup will give you the highest resolution your hardware is capable of by default (without doing the "modes" in the Screen section.

Worth a try, maybe?
 
Old 11-30-2007, 12:31 PM   #7
zeeshanhayat
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Quote:
Originally Posted by tronayne View Post
Have you tried using the xorgsetup utility? It probes your video hardware and mouse and writes a configuration file (xorg.conf) for you (it also makes a back up of any existing xorg.conf file).

Usually, xorgsetup will give you the highest resolution your hardware is capable of by default (without doing the "modes" in the Screen section.

Worth a try, maybe?
is xorgsetup availabe in all distros ?
 
Old 11-30-2007, 12:40 PM   #8
tronayne
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Dunno -- should be (it's in /usr/bin on mine) and it has to be run by root.
 
Old 11-30-2007, 12:45 PM   #9
Rick@rd
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Quote:
Originally Posted by tronayne View Post
Have you tried using the xorgsetup utility? It probes your video hardware and mouse and writes a configuration file (xorg.conf) for you (it also makes a back up of any existing xorg.conf file).

Usually, xorgsetup will give you the highest resolution your hardware is capable of by default (without doing the "modes" in the Screen section.

Worth a try, maybe?
Thanks mate, I just read that xorgsetup is only for Slackware.
 
Old 11-30-2007, 01:05 PM   #10
zeeshanhayat
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If you are using debian/ubuntu this might help to reconfigure your X

dpkg-reconfigure xserver-xfree86
 
Old 11-30-2007, 01:24 PM   #11
pixellany
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there's also "xorgconfig"---but that won't help if the manual says the monitor won't do 75Hz at that res.

Once again--why would you need to run an LCD faster than 60?
 
Old 11-30-2007, 01:29 PM   #12
H_TeXMeX_H
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Quote:
Originally Posted by Rick@rd View Post
Thanks mate, I just read that xorgsetup is only for Slackware.
'xorgsetup' is only for Slackware, instead try 'xorgcfg', it does an equivalently good job. However, if the manual states that 60 Hz is max at that resolution, it may not be a good idea to force the monitor to do more than that.
 
Old 11-30-2007, 02:04 PM   #13
Rick@rd
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Thanks everyone!
I am using 1440x900 @ 75Mhz and it works like a charm. This is how my xorg.conf looks like now.

I guess I don't need HorizSync and VertRefresh.

Code:
Section "Monitor"
        Identifier      "BenQ-T221WA"
        HorizSync       30.0-82.0
        VertRefresh     56.0-76.0
        # 1440x900 @ 75.00 Hz (GTF) hsync: 70.50 kHz; pclk: 136.49 MHz
        Modeline "1440x900_75.00"  136.49  1440 1536 1688 1936  900 901 904 940  -HSync +Vsync

        # 1440x900 @ 60.00 Hz (GTF) hsync: 55.92 kHz; pclk: 106.47 MHz
        Modeline "1440x900_60.00"  106.47  1440 1520 1672 1904  900 901 904 932  -HSync +Vsync

        Option          "DPMS"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "nVidia Corporation NV36 [GeForce FX 5700LE]"
        Monitor         "BenQ-T221WA"
        DefaultDepth    24
        SubSection "Display"
                Depth           16
                Modes           "1440x900"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1440x900"
        EndSubSection
EndSection
A great tool to generate modeline: http://www.sh.nu/nvidia/gtf.php
 
  


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