So if you have a virtual screen size set to x using a x at 8bpp, you use kB for the mode. The current programmable clock will be given as the last clock in the list. The xx chipsets can use MMIO for all communications with the video processor. Try deleting theses options from xorg. The server doesn’t prevent the user from specifying a mode that will use this memory, it prints a warning on the console.

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A ” letterbox ” effect with no stretching can be achieved using this option. These option individually disable the features of the XAA acceleration code that the Ahd and Technologies driver uses.

However there is no reliable way of probing the memory clock used in these chipsets, and so a conservative limit must be taken for the dotclock limit. It is also possible that with a high dot clock and depth on a large screen there is very little bandwidth left for using the BitBLT engine.

Many LCD displays are incapable of using a 24bpp mode. This can be fixed by using the ” 18BitBus ” option. techhologies

Display Adapters – Chips And Technologies – Chips And Technologies 65555 Computer Driver Updates

This also gives more memory bandwidth for use in the drawing operations. Try reducing the amount of memory consumed by the mode. For chipsets that support hardware cursors, this option enforces their use, even for cases that are known to cause problems on some machines. For this reason the default behaviour of the server is to use the panel timings already installed in the chip.


Note that the ” -bpp ” option has been removed and replaced with a ” -depth ” and ” -fbbpp ” option because of the confusion between the depth and number of bits per pixel used to represent to framebuffer and the pixmaps in the screens memory. It also has higher limits on the maximum memory and pixel clocks Max Ram: Typically this is probed correctly, but if you believe it to be mis-probed, this option might help. Try this if the cursor seems to have problems. Note that this option only has an effect on TFT screens.

The HiQV series of chips have three programmable clocks. In general there are two factors determining the maximum dotclock. The default behaviour is to have both the flat panel and the CRT use the same display channel and thus the same refresh rate. However, as the driver does not technologkes you from using a mode that will exceed the memory bandwidth of thebut a warning like.

So nad this option disables the XVideo extension.

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Technologiez has been reported on some configurations. In this way PseudoColor and TrueColor visuals can be used on the same screen. Hence the maximum dot-clock might need to be limited.

This sets the physical memory base address of the linear framebuffer. If you are having driver-related problems that are not addressed by this document, or if you tevhnologies found bugs in accelerated functions, you can try contacting the Xorg team the current driver maintainer can be reached at eich freedesktop.


See ct for details. The current programmable clock will be given as the last clock in the list.

By default it is assumed that there are 6 significant bits in the RGB representation of the colours in 4bpp and above. So the driver will attempt to round-up the virtual X technologise to a multiple of 64, but leave the virtual resolution untouched. Also check the BIOS settings.

You have been warned!

Information for Chips and Technologies Users

XFree86 believes that the 8bpp framebuffer is overlayed on the 16bpp framebuffer. If the colours seem darker than they should be, perhaps your ramdac is has 8 significant bits. Option “NoAccel” This option will disable the use of any accelerated functions.

For the HiQV series of chips, the memory clock can be successfully probed. Display might be corrupted!!! This option might also be needed to reduce the speed of the memory clock with the ” Overlay ” option.