Options related to drivers can be present in the Screen, Device and Monitor sections and the Display subsections. The Xserver assumes that the framebuffer, if used, will be at the top of video ram. This option is only useful when acceleration can’t be used and linear addressing can be used. Modeline “x 8bpp” The driver is capable of driving both a CRT and a flat panel display. The problem here is that the flat panel needs timings that are related to the panel size, and not the mode size.

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When constructing a modeline for use with the Chips and Technologies driver you’ll needed to considered several points.

Chips and Technologies

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.

The ct chipset introduced a new dual channel architecture.

The first two are usually loaded with The xx MMIO mode has been implemented entirely from the manual as I don’t have the hardware to test it on.

However the panel size will still be probed. When the size of the mode used is less than the panel size, the default behaviour of the server is to stretch the mode in an attempt to fill the screen. This chip is similar to the but has a 64bit memory bus as opposed to a 32bit bus.


This chip is similar to thebut it also includes XRAM support and supports the higher dot clocks of the So for unexplained problems not addressed above, please try to alter the clock you are using slightly, say in steps of 0. It also includes a fully programmable dot clock and supports all types of flat panels. Dual-head display has two effects on the modelines.

Information for Chips and Technologies Users

It has the same ID and is identified as a when probed. In this way the expensive operation of reading back to contents of the screen is never performed and the performance yech.65550 improved. In its current form, X can not take advantage of this second display channel.

In this case enough memory needs to be left for the largest unscaled video window that will be displayed. This is a problem with the video BIOS not knowing about all the funny modes that might be selected. This shouldn’t affect higher depths, and is fixable with a switch to the virtual console and back.

XFree86 releases later than 4. It is possible to use the fixed clocks supported by the chip instead by using this option. Hence qnd maximum dot-clock might need to be limited. Org releases later than 6.

For 24bpp on TFT screens, the server assumes that a 24bit tch.65550 is being used. If it is a non-standard mode, maybe you need to tweak the timings a bit. This might further reduce the available memory. Before using this check that the server reports an incorrect panel size.


Chips and Technologies drivers – Chips and Technologies Video Drivers

Hence the server assumes a This is a driver limitation that might ane relaxed in the future. Legal values for this key are depth dependent. Many DSTN screens use frame acceleration to improve the performance of the screen. It is possible that the chip could be misidentified, particular due to interactions with other drivers in the server.

Work is underway to fix this. Alternatively the user can use the ” TextClockFreq ” option described above to select a different clock for the text console.

This is useful to see that pixmaps, tiles, etc have been properly cached. The Xserver assumes that the framebuffer, if used, will be at the top of video ram. Possibly useful if you wish to use an old workstation monitor. The XVideo extension has only recently been added to the chips driver.