hi,
i found a very interesting thing . i'll post it up for
you to see. please help me analyze it.
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60 Hz refresh rate bug in win2k and winxp
The fix presented below include only editing of windows
registry hence no need of running any third party apps of
unknown origin.
Theoretically this fix should be display-driver/adapter
indenpendent since it modifies settings for the monitor
rather than display-drivers/adapter itself.
IMPORTANT
Before making any changes make sure that your monitor
supports the refresh-rate--resolution combinations you
wish to use. Use this fix at YOUR OWN RISK.
Assuming that you have installed your monitor correctly
(the monitor driver supports the desired vertical refresh
rate, here 75 Hz), and you have a "normal" system (no
multi-monitor support enabled etc) do the following:
Open regedit and find this key:
[HKEY_LOCAL_MACHINE\system\CurentControlSet\Control\Class]
.. Expand the "class key"
If you select one of them you'll see some values. There
should be a string called "Default" or "Class" or both of
them, saying what kind of device it is,
like "Modem", "Keyboards" etc. Find the key that has a
string value "Class"="Monitor".
Expand that key and there should be at least one key,
typically "0000". Might be more, in that case you'll have
see which one is currently in use. Just modify them one
by one.
Start by expanding the "0000" key, there should be a
key "MODES", expand it, now you should see a key with
your monitor's max resolution. Now, suppose that you want
a 75 Hz vertical refresh rate in resolution 1024x768. Add
a key in "MODES" called "1024,768". In the "1024,768"
key, add a String value
"Mode1"="75-75,75-75".
Now if you open "Display properties" (right-click on your
desktop) click the "Advanced"-button and go to "Monitor"
tab you will be able to select only one refresh rate
namely 75 Hz. Provided of course that "0000" key was the
key currently in use and that "Hide all unsupported
modes" checkbox was ticked. Repeat the procedure for all
refresh-rate--resolution combinations you wish to use.
Go to "Display properties->advanced->monitor" and select
the refresh rate, here 75 Hz.
Basically what this fix does is setting the lowest
refresh rate supported by your monitor to the one you
wish to use. Now all games should run on the specified
refresh rate regardless if they use Direct3D or OpenGL.
That should work in XP too.
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well i'm on a samsung syncmaster 955df 19" monitor @
1280x1024 res. i added the key value '1280x1024' with the
corresponding value name and data: "Mode1"="75-75,75-75".
once i restart my PC, i find that my desktop res. changes
to 1280x768. the change of res. to 1280x768 also causes
my maximum res. that can be produced by my monitor to
become 1280x1024 which isn't a good thing, on the other
hand, the refresh rate is capped at 75hz default instead
of the 60hz. does anyone know if there's a way to make my
start-up res. back to 1280x1024 and the default refresh
rate to be capped at 75hz. if so , please help out. i
will also try helping out as much as possible.
thanks,
- eC
