Graphics — Unable to use high resolution video modes at high refresh rates in Linux

Graphics

Unable to use high resolution video modes at high refresh rates in Linux

Symptom(s):
Unable to use high resolution video modes at high refresh rates in Linux

Solution:
The Intel® 810 and 815 chipset families have a maximum RAMDAC (Random Access Memory Digital to Analog Converter) clock of 230 MHz. The Linux drivers should auto-detect the correct RAMDAC speed, however sometimes a lower maximum clock is detected. To correct this and allow all the supported video modes to be used, add a DacSpeed line to the XF86Config file "Device" section as follows:

Section "Device"
Identifier "i810"
DacSpeed 230
EndSection

Operating System:

Linux*

This applies to:

Intel® 82810 Graphics and Memory Controller Hub (GMCH)

Intel® 82815 Graphics Controller

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Solution ID: CS-004245 (9.0.873144.3217865)
Last Modified: 16-Nov-2009
Date Created: 29-Dec-2002