Last modified April 26, 2007
915resolution is a tool to modify the video BIOS of the 800 and 900 series Intel graphics chipsets. This includes the 830, 845G, 855G, and 865G chipsets, as well as 915G, 915GM, 945G, 946GZ, G965, and Q965 chipsets. This modification is neccessary to allow the display of certain graphics resolutions for an Xorg or XFree86 graphics server.
915resolution's modifications of the BIOS are transient. There is no risk of permanent modification of the BIOS. This also means that 915resolution must be run every time the computer boots inorder for it's changes to take effect.
915resolution is derived from the tool 855resolution. However, the code differs substantially. 915resolution's code base is much simpler. 915resolution also allows the modification of bits per pixel.
915resolution has been reported to work with the following systems. It should, however, work with any system with an Intel 800 or 900 series graphics chipset.
|Samsung||X20||XVM 1600 III|
Debian packages can be found here.
You can find 915resolution scripts for Gentoo here . There is also an associated tarball for the Gentoo scripts.
FreeBSD users can look here for a port of 915resolution.
Note that you need to set the video BIOS with 915resolution before you start up the X server. You don't need to set them all. Just pick an unused mode with the right number of bits per pixel. Also, the setting is not permanent. You need to set the VBIOS every time you start the machine.
Be sure to the latest drivers from Intel. Youc an also find an updated driver here
You also need at least X server version 6.8.2
You'll need to fiddle with your X configuration to get things to work. You will probably need to create a modeline, and change horizontal/vertical scan frequencies. My X configuration file: xorg.conf. If my modeline doesn't work for you, generate your own with gtf
In the meantime, there is a test driver that has 915resolution built in here
The syntax to override a BIOS resolution is below. You place the option in the driver section.
Option "ForceBIOS" "1024x768=1400x1050"This will re-program the old 1024x768 to become a new 1400x1050 one.
You can find discussion about this problem within x.org's bug tracking system. It is bug 643
An interesting set of links on using centrino notebooks can be found here
Below are numerous links of people reporting thier experiences with 915resolution. This is a good place to look if your having problems..