> As far as I know, when you blank the screen (i.e. Screensaver), the > backlight should switch off. That certainly happens with my embedded > systems, but I use a VGA - LCD interface attached to the screen.
I might have not expressed myself clearly enough. The LCD screen I use is not a monitor with a VGA interface, but a Toshiba TFT screen with a 18-bit data bus, a few control signals, and a backlight power supply (+/- 1500V). The backlight power supply is connected to an 'inverter' which produces the necessary power voltage from a 12V power supply. The inverter has 2 control signals, one is used to switch the backlight on or off, and the other one is used to control the contrast (0V -> minimal contrast, 5V -> maximal contrast). The Savage4/IX has a 50-pin connector LCD interface. One of the pins is called ENABLK, and is not connected to the LCD data bus, so I assumed that it can be used to turn the backlight on or off. What I need is to know how to control the ENABLK signal. The Savage4/IX driver code doesn't seem to handle that, so I'm looking for the chipset specifications. > Laurent Pinchart wrote: > > Hi everybody, > > > > I recently got an embedded computer (Intel CPU) with a Savage4/IX > > chipset. The board had both a CRT and an LCD connector. > > > > I would like to be able to turn the LCD backlight on and off. The > > backlight inverter has an enable input, and the LCD connector on the > > board has a ENABLK signal. > > > > I haven't been able to find any information about that signal, but I > > suppose it comes directly from the Savage4/IX chip. > > > > I looked in the savage driver code, and found nothing related to the > > backlight. > > > > Could someone tell me if backlight support for the Savage4/IX chipset is > > implemented ? If so, where in the XFree86 code, and if not, does anyone > > have enough information (maybe the Savage4/IX datasheet) to implement > > such support ? > > > > I can code, but need technical specifications of the chip, and some help > > about the XFree86 architecture as I'm quite new to this. > > > > Thanks in advance for your help. > > > > Laurent Pinchart _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
