The HiQV chipsets contain a multimedia engine that allow a 16bpp window to be overlayed on the screen. A sample of an incomplete ” xorg. This is a debugging option and general users have no need of it. Try a lower dot clock. Hence the maximum dot-clock might need to be limited. We recommend that you try and pick a mode that is similar to a standard VESA mode.

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The clock code can be fooled into giving a different and perhaps more stable clock by simply changing the clock value slightly.

Which results in the x mode only expanded to x For 24bpp on TFT screens, the server assumes tecchnologies a 24bit bus is being used.

It also includes a fully programmable dot clock and supports all types of flat panels. Hardware cursors effectively speeds all graphics operations as the job of ensuring that the cursor remains on top is now given to the hardware.

If the user has used the ” UseModeline ” or ” FixPanelSize ” options the panel timings are derived from the mode, which can be different than the panel size.

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WW Memory bandwidth requirements exceeded by dual-channel WW mode. The four options are for 8bpp or less, 16, 24 or 32bpp LCD panel clocks, where the options above set the clocks to 65MHz.

Leaving too little memory available for the cache will only have a detrimental effect on the graphics performance. The default behaviour is to have both the flat panel and the CRT use the same display channel and thus the same refresh rate. This can be fixed by using the ” 18BitBus ” option.


Horizontal waving or jittering of the whole screen, continuously independent from drawing operations. You can avoid tecjnologies by either using the ” NoStretch ” option or removing the HWcursor ” option. Similar to the but has yet higher maximum memory and pixel clocks. The servers solution to this problem is not to do doubling vertically. This option forces the second display to take a particular amount of memory.

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Using an 8bpp, the colour will then be displayed incorrectly. Option “NoAccel” This option will disable the use of any accelerated functions.

If it is a standard mode and frequency that your screen should be able to handle, try to find different timings for a similar mode and frequency combination. Note that many chips are capable of higher memory clocks than actually set by BIOS. In addition the device, screen and layout sections of the ” xorg. The x and WinGine chipsets are capable of colour depths of 16 or 24bpp.

Org releases later than 6. However if you do try this option and are willing to debug it, I’d like to hear from you. Therefore to use this option the server must be started in either 15 or 16bpp depth.


You are probably using a dot clock that is too high or too low ; it is also possible that there is interference with a close MCLK. This might further reduce the available memory.

Like the overlays, the Xvideo extension uses a part of the video memory for a second framebuffer. The first two are usually loaded with This option forces the LCD panel size to be overridden by the modeline display sizes. Except for the HiQV chipsets, it is impossible for the server to read the value of the currently used frequency for the text console when using programmable clocks.

It is believed that this is really just a with a higher maximum dot-clock of 80MHz. This option sets the centering and stretching to the BIOS default values. If you see such display corruption, and you have this warning, your choices are to reduce the refresh rate, colour depth or resolution, or increase the speed of the memory clock with the the ” SetMClk ” option described above.

This effectively means that there are two limits on the dotclock. Therefore the server uses a default value of The server will limit the maximum dotclock to a value as specified by the manufacturer.