zkoušel jsi ovladač pro monitor ?
http://www.necdisplay.com/SupportCenter/DriverFinder/
Nebo by stačilo přepsat EDID (extended display identification data) pomocí upraveného INF souboru, protože tam pravděpodobně nejsou správné hodnoty.
(sevenforums.com)
Download Phoenix.zip and extract it to a working folder.
http://www.sevenforums.com/attachments/ ... hoenix.zip
Run it and click the registry toolbar button.
Click the pencil toolbar button for edit mode.
Change the EDID settings to reflect you display's true capabilities
Pay special attention to the Standard Timings tab.
Detailed Timing blocks 2-4 provide some very interested additional options.
Save the EDID to a .DAT file in the working folder.
Download moninfo.exe and install it.
http://www.entechtaiwan.com/files/moninfo.exe
Open the saved .DAT with MonInfo and make sure it doesn't complain about it
If it does post here for help
If MonInfo reads in an displays the settings the way you configured them in Phoenix then...
Select Create INF... from the file menu and save it to the working folder.
Feel free to edit the strings in the INF to your liking.
Open Start, type devmgmt.msc and press Enter.
Select the monitor you want to change, right click and select Update Driver Software
Use the tried and true "Have Disk" method to select the INF and install it.
Reboot
Popřípadě EDID úplně "vypnout", ale nevím, zda by to pomohlo.